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3 years agomtd: rawnand: fsmc: Fix error code in fsmc_nand_probe()
Dan Carpenter [Mon, 15 Feb 2021 15:58:49 +0000 (18:58 +0300)]
mtd: rawnand: fsmc: Fix error code in fsmc_nand_probe()

[ Upstream commit e7a97528e3c787802d8c643d6ab2f428511bb047 ]

If dma_request_channel() fails then the probe fails and it should
return a negative error code, but currently it returns success.

fixes: 4774fb0a48aa ("mtd: nand/fsmc: Add DMA support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/YCqaOZ83OvPOzLwh@mwanda
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoregmap: set debugfs_name to NULL after it is freed
Meng Li [Fri, 26 Feb 2021 02:17:37 +0000 (10:17 +0800)]
regmap: set debugfs_name to NULL after it is freed

[ Upstream commit e41a962f82e7afb5b1ee644f48ad0b3aee656268 ]

There is a upstream commit cffa4b2122f5("regmap:debugfs:
Fix a memory leak when calling regmap_attach_dev") that
adds a if condition when create name for debugfs_name.
With below function invoking logical, debugfs_name is
freed in regmap_debugfs_exit(), but it is not created again
because of the if condition introduced by above commit.
regmap_reinit_cache()
regmap_debugfs_exit()
...
regmap_debugfs_init()
So, set debugfs_name to NULL after it is freed.

Fixes: cffa4b2122f5 ("regmap: debugfs: Fix a memory leak when calling regmap_attach_dev")
Signed-off-by: Meng Li <Meng.Li@windriver.com>
Link: https://lore.kernel.org/r/20210226021737.7690-1-Meng.Li@windriver.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agousb: typec: tcpci: Check ROLE_CONTROL while interpreting CC_STATUS
Badhri Jagan Sridharan [Thu, 4 Mar 2021 07:09:31 +0000 (23:09 -0800)]
usb: typec: tcpci: Check ROLE_CONTROL while interpreting CC_STATUS

[ Upstream commit 19c234a14eafca78e0bc14ffb8be3891096ce147 ]

While interpreting CC_STATUS, ROLE_CONTROL has to be read to make
sure that CC1/CC2 is not forced presenting Rp/Rd.

>From the TCPCI spec:

4.4.5.2 ROLE_CONTROL (Normative):
The TCPM shall write B6 (DRP) = 0b and B3..0 (CC1/CC2) if it wishes
to control the Rp/Rd directly instead of having the TCPC perform
DRP toggling autonomously. When controlling Rp/Rd directly, the
TCPM writes to B3..0 (CC1/CC2) each time it wishes to change the
CC1/CC2 values. This control is used for TCPM-TCPC implementing
Source or Sink only as well as when a connection has been detected
via DRP toggling but the TCPM wishes to attempt Try.Src or Try.Snk.

Table 4-22. CC_STATUS Register Definition:
If (ROLE_CONTROL.CC1 = Rd) or ConnectResult=1)
00b: SNK.Open (Below maximum vRa)
01b: SNK.Default (Above minimum vRd-Connect)
10b: SNK.Power1.5 (Above minimum vRd-Connect) Detects Rp-1.5A
11b: SNK.Power3.0 (Above minimum vRd-Connect) Detects Rp-3.0A

If (ROLE_CONTROL.CC2=Rd) or (ConnectResult=1)
00b: SNK.Open (Below maximum vRa)
01b: SNK.Default (Above minimum vRd-Connect)
10b: SNK.Power1.5 (Above minimum vRd-Connect) Detects Rp 1.5A
11b: SNK.Power3.0 (Above minimum vRd-Connect) Detects Rp 3.0A

Fixes: 74e656d6b0551 ("staging: typec: Type-C Port Controller Interface driver (tcpci)")
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210304070931.1947316-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoserial: stm32: fix tx_empty condition
Erwan Le Ray [Thu, 4 Mar 2021 16:23:07 +0000 (17:23 +0100)]
serial: stm32: fix tx_empty condition

[ Upstream commit 3db1d52466dc11dca4e47ef12a6e6e97f846af62 ]

In "tx_empty", we should poll TC bit in both DMA and PIO modes (instead of
TXE) to check transmission data register has been transmitted independently
of the FIFO mode. TC indicates that both transmit register and shift
register are empty. When shift register is empty, tx_empty should return
TIOCSER_TEMT instead of TC value.

Cleans the USART_CR_TC TCCF register define (transmission complete clear
flag) as it is duplicate of USART_ICR_TCCF.

Fixes: 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver")
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-13-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoserial: stm32: fix incorrect characters on console
Erwan Le Ray [Thu, 4 Mar 2021 16:22:58 +0000 (17:22 +0100)]
serial: stm32: fix incorrect characters on console

[ Upstream commit f264c6f6aece81a9f8fbdf912b20bd3feb476a7a ]

Incorrect characters are observed on console during boot. This issue occurs
when init/main.c is modifying termios settings to open /dev/console on the
rootfs.

This patch adds a waiting loop in set_termios to wait for TX shift register
empty (and TX FIFO if any) before stopping serial port.

Fixes: 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver")
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-4-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct PMIC interrupt trigger level on Snow
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:25 +0000 (22:25 +0100)]
ARM: dts: exynos: correct PMIC interrupt trigger level on Snow

[ Upstream commit 8987efbb17c2522be8615085df9a14da2ab53d34 ]

The Maxim PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: c61248afa819 ("ARM: dts: Add max77686 RTC interrupt to cros5250-common")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-9-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct PMIC interrupt trigger level on SMDK5250
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:24 +0000 (22:25 +0100)]
ARM: dts: exynos: correct PMIC interrupt trigger level on SMDK5250

[ Upstream commit f6368c60561370e4a92fac22982a3bd656172170 ]

The Maxim PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: 47580e8d94c2 ("ARM: dts: Specify MAX77686 pmic interrupt for exynos5250-smdk5250")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-8-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct PMIC interrupt trigger level on Odroid X/U3 family
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:22 +0000 (22:25 +0100)]
ARM: dts: exynos: correct PMIC interrupt trigger level on Odroid X/U3 family

[ Upstream commit 6503c568e97a52f8b7a3109718db438e52e59485 ]

The Maxim PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: eea6653aae7b ("ARM: dts: Enable PMIC interrupts for exynos4412-odroid-common")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-6-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct PMIC interrupt trigger level on Midas family
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:21 +0000 (22:25 +0100)]
ARM: dts: exynos: correct PMIC interrupt trigger level on Midas family

[ Upstream commit e52dcd6e70fab51f53292e53336ecb007bb60889 ]

The Maxim PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: 15dfdfad2d4a ("ARM: dts: Add basic dts for Exynos4412-based Trats 2 board")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-5-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct MUIC interrupt trigger level on Midas family
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:20 +0000 (22:25 +0100)]
ARM: dts: exynos: correct MUIC interrupt trigger level on Midas family

[ Upstream commit 15107e443ab8c6cb35eff10438993e4bc944d9ae ]

The Maxim MUIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: 7eec1266751b ("ARM: dts: Add Maxim 77693 PMIC to exynos4412-trats2")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-4-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoARM: dts: exynos: correct fuel gauge interrupt trigger level on Midas family
Krzysztof Kozlowski [Thu, 10 Dec 2020 21:25:19 +0000 (22:25 +0100)]
ARM: dts: exynos: correct fuel gauge interrupt trigger level on Midas family

[ Upstream commit 8a45f33bd36efbb624198cfa9fdf1f66fd1c3d26 ]

The Maxim fuel gauge datasheets describe the interrupt line as active
low with a requirement of acknowledge from the CPU.  The falling edge
interrupt will mostly work but it's not correct.

Fixes: e8614292cd41 ("ARM: dts: Add Maxim 77693 fuel gauge node for exynos4412-trats2")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-3-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agomemory: gpmc: fix out of bounds read and dereference on gpmc_cs[]
Colin Ian King [Tue, 23 Feb 2021 19:38:21 +0000 (19:38 +0000)]
memory: gpmc: fix out of bounds read and dereference on gpmc_cs[]

[ Upstream commit e004c3e67b6459c99285b18366a71af467d869f5 ]

Currently the array gpmc_cs is indexed by cs before it cs is range checked
and the pointer read from this out-of-index read is dereferenced. Fix this
by performing the range check on cs before the read and the following
pointer dereference.

Addresses-Coverity: ("Negative array index read")
Fixes: 9ed7a776eb50 ("ARM: OMAP2+: Fix support for multiple devices on a GPMC chip select")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210223193821.17232-1-colin.king@canonical.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agousb: gadget: pch_udc: Revert d3cb25a12138 completely
Andy Shevchenko [Tue, 23 Mar 2021 15:36:24 +0000 (17:36 +0200)]
usb: gadget: pch_udc: Revert d3cb25a12138 completely

commit 50a318cc9b54a36f00beadf77e578a50f3620477 upstream.

The commit d3cb25a12138 ("usb: gadget: udc: fix spin_lock in pch_udc")
obviously was not thought through and had made the situation even worse
than it was before. Two changes after almost reverted it. but a few
leftovers have been left as it. With this revert d3cb25a12138 completely.

While at it, narrow down the scope of unlocked section to prevent
potential race when prot_stall is assigned.

Fixes: d3cb25a12138 ("usb: gadget: udc: fix spin_lock in pch_udc")
Fixes: 9903b6bedd38 ("usb: gadget: pch-udc: fix lock")
Fixes: 1d23d16a88e6 ("usb: gadget: pch_udc: reorder spin_[un]lock to avoid deadlock")
Cc: Iago Abal <mail@iagoabal.eu>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210323153626.54908-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoovl: fix missing revert_creds() on error path
Dan Carpenter [Tue, 23 Mar 2021 13:19:35 +0000 (16:19 +0300)]
ovl: fix missing revert_creds() on error path

commit 7b279bbfd2b230c7a210ff8f405799c7e46bbf48 upstream.

Smatch complains about missing that the ovl_override_creds() doesn't
have a matching revert_creds() if the dentry is disconnected.  Fix this
by moving the ovl_override_creds() until after the disconnected check.

Fixes: aa3ff3c152ff ("ovl: copy up of disconnected dentries")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoKVM: s390: split kvm_s390_real_to_abs
Claudio Imbrenda [Mon, 22 Mar 2021 14:05:58 +0000 (15:05 +0100)]
KVM: s390: split kvm_s390_real_to_abs

commit c5d1f6b531e68888cbe6718b3f77a60115d58b9c upstream.

A new function _kvm_s390_real_to_abs will apply prefixing to a real address
with a given prefix value.

The old kvm_s390_real_to_abs becomes now a wrapper around the new function.

This is needed to avoid code duplication in vSIE.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210322140559.500716-2-imbrenda@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoKVM: s390: fix guarded storage control register handling
Heiko Carstens [Thu, 15 Apr 2021 08:01:27 +0000 (10:01 +0200)]
KVM: s390: fix guarded storage control register handling

commit 44bada28219031f9e8e86b84460606efa57b871e upstream.

store_regs_fmt2() has an ordering problem: first the guarded storage
facility is enabled on the local cpu, then preemption disabled, and
then the STGSC (store guarded storage controls) instruction is
executed.

If the process gets scheduled away between enabling the guarded
storage facility and before preemption is disabled, this might lead to
a special operation exception and therefore kernel crash as soon as
the process is scheduled back and the STGSC instruction is executed.

Fixes: 4e0b1ab72b8a ("KVM: s390: gs support for kvm guests")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: <stable@vger.kernel.org> # 4.12
Link: https://lore.kernel.org/r/20210415080127.1061275-1-hca@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoKVM: s390: split kvm_s390_logical_to_effective
Claudio Imbrenda [Tue, 2 Mar 2021 12:36:44 +0000 (13:36 +0100)]
KVM: s390: split kvm_s390_logical_to_effective

commit f85f1baaa18932a041fd2b1c2ca6cfd9898c7d2b upstream.

Split kvm_s390_logical_to_effective to a generic function called
_kvm_s390_logical_to_effective. The new function takes a PSW and an address
and returns the address with the appropriate bits masked off. The old
function now calls the new function with the appropriate PSW from the vCPU.

This is needed to avoid code duplication for vSIE.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: stable@vger.kernel.org # for VSIE: correctly handle MVPG when in VSIE
Link: https://lore.kernel.org/r/20210302174443.514363-2-imbrenda@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agox86/cpu: Initialize MSR_TSC_AUX if RDTSCP *or* RDPID is supported
Sean Christopherson [Tue, 4 May 2021 22:56:31 +0000 (15:56 -0700)]
x86/cpu: Initialize MSR_TSC_AUX if RDTSCP *or* RDPID is supported

commit b6b4fbd90b155a0025223df2c137af8a701d53b3 upstream.

Initialize MSR_TSC_AUX with CPU node information if RDTSCP or RDPID is
supported.  This fixes a bug where vdso_read_cpunode() will read garbage
via RDPID if RDPID is supported but RDTSCP is not.  While no known CPU
supports RDPID but not RDTSCP, both Intel's SDM and AMD's APM allow for
RDPID to exist without RDTSCP, e.g. it's technically a legal CPU model
for a virtual machine.

Note, technically MSR_TSC_AUX could be initialized if and only if RDPID
is supported since RDTSCP is currently not used to retrieve the CPU node.
But, the cost of the superfluous WRMSR is negigible, whereas leaving
MSR_TSC_AUX uninitialized is just asking for future breakage if someone
decides to utilize RDTSCP.

Fixes: a582c540ac1b ("x86/vdso: Use RDPID in preference to LSL when available")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210504225632.1532621-2-seanjc@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Remove redundant entry for ALC861 Haier/Uniwill devices
Takashi Iwai [Wed, 28 Apr 2021 11:27:03 +0000 (13:27 +0200)]
ALSA: hda/realtek: Remove redundant entry for ALC861 Haier/Uniwill devices

commit defce244b01ee12534910a4544e11be5eb927d25 upstream.

The quirk entry for Uniwill ECS M31EI is with the PCI SSID device 0,
which means matching with all.  That is, it's essentially equivalent
with SND_PCI_QUIRK_VENDOR(0x1584), which also matches with the
previous entry for Haier W18 applying the very same quirk.

Let's unify them with the single vendor-quirk entry.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-13-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC269 Lenovo quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:27:00 +0000 (13:27 +0200)]
ALSA: hda/realtek: Re-order ALC269 Lenovo quirk table entries

commit f552ff54c2a700616a02b038e4bf3cbf859f65b7 upstream.

Just re-order the alc269_fixup_tbl[] entries for Lenovo devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-10-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC269 Sony quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:59 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC269 Sony quirk table entries

commit cab561f8d4bc9b196ae20c960aa5da89fd786ab5 upstream.

Just re-order the alc269_fixup_tbl[] entries for Sony devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-9-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC269 Dell quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:57 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC269 Dell quirk table entries

commit aa143ad39a52d968ac69e426d329bb74f270e6ca upstream.

Just re-order the alc269_fixup_tbl[] entries for Dell devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC269 HP quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:55 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC269 HP quirk table entries

commit 45461e3b554c75ddff9703539f3711cc3dfb0422 upstream.

Just re-order the alc269_fixup_tbl[] entries for HP devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Formerly, some entries were grouped for the actual codec, but this
doesn't seem reasonable to keep in that way.  So now we simply keep
the PCI SSID order for the whole.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC882 Clevo quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:54 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC882 Clevo quirk table entries

commit 13e1a4cd490b959a4c72c9f4fb502ef56b190062 upstream.

Just re-order the alc882_fixup_tbl[] entries for Clevo devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also, user lower hex letters in the entry.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC882 Sony quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:53 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC882 Sony quirk table entries

commit b7529c18feecb1af92f9db08c8e7fe446a82d96d upstream.

Just re-order the alc882_fixup_tbl[] entries for Sony devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/realtek: Re-order ALC882 Acer quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:26:52 +0000 (13:26 +0200)]
ALSA: hda/realtek: Re-order ALC882 Acer quirk table entries

commit b265047ac56bad8c4f3d0c8bf9cb4e828ee0d28e upstream.

Just re-order the alc882_fixup_tbl[] entries for Acer devices for
avoiding the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agodrm/radeon: fix copy of uninitialized variable back to userspace
Colin Ian King [Wed, 3 Mar 2021 00:27:59 +0000 (00:27 +0000)]
drm/radeon: fix copy of uninitialized variable back to userspace

commit 8dbc2ccac5a65c5b57e3070e36a3dc97c7970d96 upstream.

Currently the ioctl command RADEON_INFO_SI_BACKEND_ENABLED_MASK can
copy back uninitialised data in value_tmp that pointer *value points
to. This can occur when rdev->family is less than CHIP_BONAIRE and
less than CHIP_TAHITI.  Fix this by adding in a missing -EINVAL
so that no invalid value is copied back to userspace.

Addresses-Coverity: ("Uninitialized scalar variable)
Cc: stable@vger.kernel.org # 3.13+
Fixes: 439a1cfffe2c ("drm/radeon: expose render backend mask to the userspace")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agocfg80211: scan: drop entry from hidden_list on overflow
Johannes Berg [Fri, 16 Apr 2021 07:42:14 +0000 (09:42 +0200)]
cfg80211: scan: drop entry from hidden_list on overflow

commit 010bfbe768f7ecc876ffba92db30432de4997e2a upstream.

If we overflow the maximum number of BSS entries and free the
new entry, drop it from any hidden_list that it may have been
added to in the code above or in cfg80211_combine_bsses().

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210416094212.5de7d1676ad7.Ied283b0bc5f504845e7d6ab90626bdfa68bb3dc0@changeid
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoipw2x00: potential buffer overflow in libipw_wx_set_encodeext()
Dan Carpenter [Wed, 14 Apr 2021 08:29:55 +0000 (11:29 +0300)]
ipw2x00: potential buffer overflow in libipw_wx_set_encodeext()

commit 260a9ad9446723d4063ed802989758852809714d upstream.

The "ext->key_len" is a u16 that comes from the user.  If it's over
SCM_KEY_LEN (32) that could lead to memory corruption.

Fixes: e0d369d1d969 ("[PATCH] ieee82011: Added WE-18 support to default wireless extension handler")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stanislav Yakovlev <stas.yakovlev@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/YHaoA1i+8uT4ir4h@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomd: Fix missing unused status line of /proc/mdstat
Jan Glauber [Wed, 17 Mar 2021 14:04:39 +0000 (15:04 +0100)]
md: Fix missing unused status line of /proc/mdstat

commit 7abfabaf5f805f5171d133ce6af9b65ab766e76a upstream.

Reading /proc/mdstat with a read buffer size that would not
fit the unused status line in the first read will skip this
line from the output.

So 'dd if=/proc/mdstat bs=64 2>/dev/null' will not print something
like: unused devices: <none>

Don't return NULL immediately in start() for v=2 but call
show() once to print the status line also for multiple reads.

Cc: stable@vger.kernel.org
Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code and interface")
Signed-off-by: Jan Glauber <jglauber@digitalocean.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomd: md_open returns -EBUSY when entering racing area
Zhao Heming [Sat, 3 Apr 2021 03:01:25 +0000 (11:01 +0800)]
md: md_open returns -EBUSY when entering racing area

commit 6a4db2a60306eb65bfb14ccc9fde035b74a4b4e7 upstream.

commit d3374825ce57 ("md: make devices disappear when they are no longer
needed.") introduced protection between mddev creating & removing. The
md_open shouldn't create mddev when all_mddevs list doesn't contain
mddev. With currently code logic, there will be very easy to trigger
soft lockup in non-preempt env.

This patch changes md_open returning from -ERESTARTSYS to -EBUSY, which
will break the infinitely retry when md_open enter racing area.

This patch is partly fix soft lockup issue, full fix needs mddev_find
is split into two functions: mddev_find & mddev_find_or_alloc. And
md_open should call new mddev_find (it only does searching job).

For more detail, please refer with Christoph's "split mddev_find" patch
in later commits.

3 years agomd: factor out a mddev_find_locked helper from mddev_find
Christoph Hellwig [Sat, 3 Apr 2021 16:15:28 +0000 (18:15 +0200)]
md: factor out a mddev_find_locked helper from mddev_find

commit 8b57251f9a91f5e5a599de7549915d2d226cc3af upstream.

Factor out a self-contained helper to just lookup a mddev by the dev_t
"unit".

Cc: stable@vger.kernel.org
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomd: split mddev_find
Christoph Hellwig [Sat, 3 Apr 2021 16:15:29 +0000 (18:15 +0200)]
md: split mddev_find

commit 65aa97c4d2bfd76677c211b9d03ef05a98c6d68e upstream.

Split mddev_find into a simple mddev_find that just finds an existing
mddev by the unit number, and a more complicated mddev_find that deals
with find or allocating a mddev.

This turns out to fix this bug reported by Zhao Heming.

----------------------------- snip ------------------------------
commit d3374825ce57 ("md: make devices disappear when they are no longer
needed.") introduced protection between mddev creating & removing. The
md_open shouldn't create mddev when all_mddevs list doesn't contain
mddev. With currently code logic, there will be very easy to trigger
soft lockup in non-preempt env.

3 years agomd-cluster: fix use-after-free issue when removing rdev
Heming Zhao [Thu, 8 Apr 2021 07:44:15 +0000 (15:44 +0800)]
md-cluster: fix use-after-free issue when removing rdev

commit f7c7a2f9a23e5b6e0f5251f29648d0238bb7757e upstream.

md_kick_rdev_from_array will remove rdev, so we should
use rdev_for_each_safe to search list.

How to trigger:

env: Two nodes on kvm-qemu x86_64 VMs (2C2G with 2 iscsi luns).

```
node2=192.168.0.3

for i in {1..20}; do
    echo ==== $i `date` ====;

    mdadm -Ss && ssh ${node2} "mdadm -Ss"
    wipefs -a /dev/sda /dev/sdb

    mdadm -CR /dev/md0 -b clustered -e 1.2 -n 2 -l 1 /dev/sda \
       /dev/sdb --assume-clean
    ssh ${node2} "mdadm -A /dev/md0 /dev/sda /dev/sdb"
    mdadm --wait /dev/md0
    ssh ${node2} "mdadm --wait /dev/md0"

    mdadm --manage /dev/md0 --fail /dev/sda --remove /dev/sda
    sleep 1
done
```

Crash stack:

```
stack segment: 0000 [#1] SMP
... ...
RIP: 0010:md_check_recovery+0x1e8/0x570 [md_mod]
... ...
RSP: 0018:ffffb149807a7d68 EFLAGS: 00010207
RAX: 0000000000000000 RBX: ffff9d494c180800 RCX: ffff9d490fc01e50
RDX: fffff047c0ed8308 RSI: 0000000000000246 RDI: 0000000000000246
RBP: 6b6b6b6b6b6b6b6b R08: ffff9d490fc01e40 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffff9d494c180818 R14: ffff9d493399ef38 R15: ffff9d4933a1d800
FS:  0000000000000000(0000) GS:ffff9d494f700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe68cab9010 CR3: 000000004c6be001 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 raid1d+0x5c/0xd40 [raid1]
 ? finish_task_switch+0x75/0x2a0
 ? lock_timer_base+0x67/0x80
 ? try_to_del_timer_sync+0x4d/0x80
 ? del_timer_sync+0x41/0x50
 ? schedule_timeout+0x254/0x2d0
 ? md_start_sync+0xe0/0xe0 [md_mod]
 ? md_thread+0x127/0x160 [md_mod]
 md_thread+0x127/0x160 [md_mod]
 ? wait_woken+0x80/0x80
 kthread+0x10d/0x130
 ? kthread_park+0xa0/0xa0
 ret_from_fork+0x1f/0x40
```

Fixes: dbb64f8635f5d ("md-cluster: Fix adding of new disk with new reload code")
Fixes: 659b254fa7392 ("md-cluster: remove a disk asynchronously from cluster environment")
Cc: stable@vger.kernel.org
Reviewed-by: Gang He <ghe@suse.com>
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomd/bitmap: wait for external bitmap writes to complete during tear down
Sudhakar Panneerselvam [Tue, 13 Apr 2021 04:08:29 +0000 (04:08 +0000)]
md/bitmap: wait for external bitmap writes to complete during tear down

commit 404a8ef512587b2460107d3272c17a89aef75edf upstream.

NULL pointer dereference was observed in super_written() when it tries
to access the mddev structure.

[The below stack trace is from an older kernel, but the problem described
in this patch applies to the mainline kernel.]

[ 1194.474861] task: ffff8fdd20858000 task.stack: ffffb99d40790000
[ 1194.488000] RIP: 0010:super_written+0x29/0xe1
[ 1194.499688] RSP: 0018:ffff8ffb7fcc3c78 EFLAGS: 00010046
[ 1194.512477] RAX: 0000000000000000 RBX: ffff8ffb7bf4a000 RCX: ffff8ffb78991048
[ 1194.527325] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8ffb56b8a200
[ 1194.542576] RBP: ffff8ffb7fcc3c90 R08: 000000000000000b R09: 0000000000000000
[ 1194.558001] R10: ffff8ffb56b8a298 R11: 0000000000000000 R12: ffff8ffb56b8a200
[ 1194.573070] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1194.588117] FS:  0000000000000000(0000) GS:ffff8ffb7fcc0000(0000) knlGS:0000000000000000
[ 1194.604264] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1194.617375] CR2: 00000000000002b8 CR3: 00000021e040a002 CR4: 00000000007606e0
[ 1194.632327] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1194.647865] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1194.663316] PKRU: 55555554
[ 1194.674090] Call Trace:
[ 1194.683735]  <IRQ>
[ 1194.692948]  bio_endio+0xae/0x135
[ 1194.703580]  blk_update_request+0xad/0x2fa
[ 1194.714990]  blk_update_bidi_request+0x20/0x72
[ 1194.726578]  __blk_end_bidi_request+0x2c/0x4d
[ 1194.738373]  __blk_end_request_all+0x31/0x49
[ 1194.749344]  blk_flush_complete_seq+0x377/0x383
[ 1194.761550]  flush_end_io+0x1dd/0x2a7
[ 1194.772910]  blk_finish_request+0x9f/0x13c
[ 1194.784544]  scsi_end_request+0x180/0x25c
[ 1194.796149]  scsi_io_completion+0xc8/0x610
[ 1194.807503]  scsi_finish_command+0xdc/0x125
[ 1194.818897]  scsi_softirq_done+0x81/0xde
[ 1194.830062]  blk_done_softirq+0xa4/0xcc
[ 1194.841008]  __do_softirq+0xd9/0x29f
[ 1194.851257]  irq_exit+0xe6/0xeb
[ 1194.861290]  do_IRQ+0x59/0xe3
[ 1194.871060]  common_interrupt+0x1c6/0x382
[ 1194.881988]  </IRQ>
[ 1194.890646] RIP: 0010:cpuidle_enter_state+0xdd/0x2a5
[ 1194.902532] RSP: 0018:ffffb99d40793e68 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff43
[ 1194.917317] RAX: ffff8ffb7fce27c0 RBX: ffff8ffb7fced800 RCX: 000000000000001f
[ 1194.932056] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
[ 1194.946428] RBP: ffffb99d40793ea0 R08: 0000000000000004 R09: 0000000000002ed2
[ 1194.960508] R10: 0000000000002664 R11: 0000000000000018 R12: 0000000000000003
[ 1194.974454] R13: 000000000000000b R14: ffffffff925715a0 R15: 0000011610120d5a
[ 1194.988607]  ? cpuidle_enter_state+0xcc/0x2a5
[ 1194.999077]  cpuidle_enter+0x17/0x19
[ 1195.008395]  call_cpuidle+0x23/0x3a
[ 1195.017718]  do_idle+0x172/0x1d5
[ 1195.026358]  cpu_startup_entry+0x73/0x75
[ 1195.035769]  start_secondary+0x1b9/0x20b
[ 1195.044894]  secondary_startup_64+0xa5/0xa5
[ 1195.084921] RIP: super_written+0x29/0xe1 RSP: ffff8ffb7fcc3c78
[ 1195.096354] CR2: 00000000000002b8

bio in the above stack is a bitmap write whose completion is invoked after
the tear down sequence sets the mddev structure to NULL in rdev.

During tear down, there is an attempt to flush the bitmap writes, but for
external bitmaps, there is no explicit wait for all the bitmap writes to
complete. For instance, md_bitmap_flush() is called to flush the bitmap
writes, but the last call to md_bitmap_daemon_work() in md_bitmap_flush()
could generate new bitmap writes for which there is no explicit wait to
complete those writes. The call to md_bitmap_update_sb() will return
simply for external bitmaps and the follow-up call to md_update_sb() is
conditional and may not get called for external bitmaps. This results in a
kernel panic when the completion routine, super_written() is called which
tries to reference mddev in the rdev that has been set to
NULL(in unbind_rdev_from_array() by tear down sequence).

The solution is to call md_super_wait() for external bitmaps after the
last call to md_bitmap_daemon_work() in md_bitmap_flush() to ensure there
are no pending bitmap writes before proceeding with the tear down.

Cc: stable@vger.kernel.org
Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@oracle.com>
Reviewed-by: Zhao Heming <heming.zhao@suse.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomisc: vmw_vmci: explicitly initialize vmci_datagram payload
Tetsuo Handa [Fri, 2 Apr 2021 12:17:42 +0000 (21:17 +0900)]
misc: vmw_vmci: explicitly initialize vmci_datagram payload

commit b2192cfeba8481224da0a4ec3b4a7ccd80b1623b upstream.

KMSAN complains that vmci_check_host_caps() left the payload part of
check_msg uninitialized.

  =====================================================
  BUG: KMSAN: uninit-value in kmsan_check_memory+0xd/0x10
  CPU: 1 PID: 1 Comm: swapper/0 Tainted: G    B             5.11.0-rc7+ #4
  Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020
  Call Trace:
   dump_stack+0x21c/0x280
   kmsan_report+0xfb/0x1e0
   kmsan_internal_check_memory+0x202/0x520
   kmsan_check_memory+0xd/0x10
   iowrite8_rep+0x86/0x380
   vmci_guest_probe_device+0xf0b/0x1e70
   pci_device_probe+0xab3/0xe70
   really_probe+0xd16/0x24d0
   driver_probe_device+0x29d/0x3a0
   device_driver_attach+0x25a/0x490
   __driver_attach+0x78c/0x840
   bus_for_each_dev+0x210/0x340
   driver_attach+0x89/0xb0
   bus_add_driver+0x677/0xc40
   driver_register+0x485/0x8e0
   __pci_register_driver+0x1ff/0x350
   vmci_guest_init+0x3e/0x41
   vmci_drv_init+0x1d6/0x43f
   do_one_initcall+0x39c/0x9a0
   do_initcall_level+0x1d7/0x259
   do_initcalls+0x127/0x1cb
   do_basic_setup+0x33/0x36
   kernel_init_freeable+0x29a/0x3ed
   kernel_init+0x1f/0x840
   ret_from_fork+0x1f/0x30

  Uninit was created at:
   kmsan_internal_poison_shadow+0x5c/0xf0
   kmsan_slab_alloc+0x8d/0xe0
   kmem_cache_alloc+0x84f/0xe30
   vmci_guest_probe_device+0xd11/0x1e70
   pci_device_probe+0xab3/0xe70
   really_probe+0xd16/0x24d0
   driver_probe_device+0x29d/0x3a0
   device_driver_attach+0x25a/0x490
   __driver_attach+0x78c/0x840
   bus_for_each_dev+0x210/0x340
   driver_attach+0x89/0xb0
   bus_add_driver+0x677/0xc40
   driver_register+0x485/0x8e0
   __pci_register_driver+0x1ff/0x350
   vmci_guest_init+0x3e/0x41
   vmci_drv_init+0x1d6/0x43f
   do_one_initcall+0x39c/0x9a0
   do_initcall_level+0x1d7/0x259
   do_initcalls+0x127/0x1cb
   do_basic_setup+0x33/0x36
   kernel_init_freeable+0x29a/0x3ed
   kernel_init+0x1f/0x840
   ret_from_fork+0x1f/0x30

  Bytes 28-31 of 36 are uninitialized
  Memory access of size 36 starts at ffff8881675e5f00
  =====================================================

Fixes: 1f166439917b69d3 ("VMCI: guest side driver implementation.")
Cc: <stable@vger.kernel.org>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/r/20210402121742.3917-2-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomisc: vmw_vmci: explicitly initialize vmci_notify_bm_set_msg struct
Tetsuo Handa [Fri, 2 Apr 2021 12:17:41 +0000 (21:17 +0900)]
misc: vmw_vmci: explicitly initialize vmci_notify_bm_set_msg struct

commit 376565b9717c30cd58ad33860fa42697615fa2e4 upstream.

KMSAN complains that the vmci_use_ppn64() == false path in
vmci_dbell_register_notification_bitmap() left upper 32bits of
bitmap_set_msg.bitmap_ppn64 member uninitialized.

  =====================================================
  BUG: KMSAN: uninit-value in kmsan_check_memory+0xd/0x10
  CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.11.0-rc7+ #4
  Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020
  Call Trace:
   dump_stack+0x21c/0x280
   kmsan_report+0xfb/0x1e0
   kmsan_internal_check_memory+0x484/0x520
   kmsan_check_memory+0xd/0x10
   iowrite8_rep+0x86/0x380
   vmci_send_datagram+0x150/0x280
   vmci_dbell_register_notification_bitmap+0x133/0x1e0
   vmci_guest_probe_device+0xcab/0x1e70
   pci_device_probe+0xab3/0xe70
   really_probe+0xd16/0x24d0
   driver_probe_device+0x29d/0x3a0
   device_driver_attach+0x25a/0x490
   __driver_attach+0x78c/0x840
   bus_for_each_dev+0x210/0x340
   driver_attach+0x89/0xb0
   bus_add_driver+0x677/0xc40
   driver_register+0x485/0x8e0
   __pci_register_driver+0x1ff/0x350
   vmci_guest_init+0x3e/0x41
   vmci_drv_init+0x1d6/0x43f
   do_one_initcall+0x39c/0x9a0
   do_initcall_level+0x1d7/0x259
   do_initcalls+0x127/0x1cb
   do_basic_setup+0x33/0x36
   kernel_init_freeable+0x29a/0x3ed
   kernel_init+0x1f/0x840
   ret_from_fork+0x1f/0x30

  Local variable ----bitmap_set_msg@vmci_dbell_register_notification_bitmap created at:
   vmci_dbell_register_notification_bitmap+0x50/0x1e0
   vmci_dbell_register_notification_bitmap+0x50/0x1e0

  Bytes 28-31 of 32 are uninitialized
  Memory access of size 32 starts at ffff88810098f570
  =====================================================

Fixes: 83e2ec765be03e8a ("VMCI: doorbell implementation.")
Cc: <stable@vger.kernel.org>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/r/20210402121742.3917-1-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomisc: lis3lv02d: Fix false-positive WARN on various HP models
Hans de Goede [Wed, 17 Feb 2021 10:24:59 +0000 (11:24 +0100)]
misc: lis3lv02d: Fix false-positive WARN on various HP models

commit 3641762c1c9c7cfd84a7061a0a73054f09b412e3 upstream.

Before this commit lis3lv02d_get_pwron_wait() had a WARN_ONCE() to catch
a potential divide by 0. WARN macros should only be used to catch internal
kernel bugs and that is not the case here. We have been receiving a lot of
bug reports about kernel backtraces caused by this WARN.

The div value being checked comes from the lis3->odrs[] array. Which
is sized to be a power-of-2 matching the number of bits in lis3->odr_mask.

The only lis3 model where this array is not entirely filled with non zero
values. IOW the only model where we can hit the div == 0 check is the
3dc ("8 bits 3DC sensor") model:

int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};

Note the 0 value at index 0, according to the datasheet an odr index of 0
means "Power-down mode". HP typically uses a lis3 accelerometer for HDD
fall protection. What I believe is happening here is that on newer
HP devices, which only contain a SDD, the BIOS is leaving the lis3 device
powered-down since it is not used for HDD fall protection.

Note that the lis3_3dc_rates array initializer only specifies 10 values,
which matches the datasheet. So it also contains 6 zero values at the end.

Replace the WARN with a normal check, which treats an odr index of 0
as power-down and uses a normal dev_err() to report the error in case
odr index point past the initialized part of the array.

Fixes: 1510dd5954be ("lis3lv02d: avoid divide by zero due to unchecked")
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=785814
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1817027
BugLink: https://bugs.centos.org/view.php?id=10720
Link: https://lore.kernel.org/r/20210217102501.31758-1-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoiio:accel:adis16201: Fix wrong axis assignment that prevents loading
Jonathan Cameron [Sun, 21 Mar 2021 18:29:56 +0000 (18:29 +0000)]
iio:accel:adis16201: Fix wrong axis assignment that prevents loading

commit 4e102429f3dc62dce546f6107e34a4284634196d upstream.

Whilst running some basic tests as part of writing up the dt-bindings for
this driver (to follow), it became clear it doesn't actually load
currently.

iio iio:device1: tried to double register : in_incli_x_index
adis16201 spi0.0: Failed to create buffer sysfs interfaces
adis16201: probe of spi0.0 failed with error -16

Looks like a cut and paste / update bug.  Fixes tag obviously not accurate
but we don't want to bother carry thing back to before the driver moved
out of staging.

Fixes: 591298e54cea ("Staging: iio: accel: adis16201: Move adis16201 driver out of staging")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <Stable@vger.kernel.org>
Cc: Himanshu Jha <himanshujha199640@gmail.com>
Cc: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20210321182956.844652-1-jic23@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoFDDI: defxx: Bail out gracefully with unassigned PCI resource for CSR
Maciej W. Rozycki [Wed, 10 Mar 2021 12:03:09 +0000 (13:03 +0100)]
FDDI: defxx: Bail out gracefully with unassigned PCI resource for CSR

commit f626ca682912fab55dff15469ce893ae16b65c7e upstream.

Recent versions of the PCI Express specification have deprecated support
for I/O transactions and actually some PCIe host bridges, such as Power
Systems Host Bridge 4 (PHB4), do not implement them.

For those systems the PCI BARs that request a mapping in the I/O space
have the length recorded in the corresponding PCI resource set to zero,
which makes it unassigned:

# lspci -s 0031:02:04.0 -v
0031:02:04.0 FDDI network controller: Digital Equipment Corporation PCI-to-PDQ Interface Chip [PFI] FDDI (DEFPA) (rev 02)
Subsystem: Digital Equipment Corporation FDDIcontroller/PCI (DEFPA)
Flags: bus master, medium devsel, latency 136, IRQ 57, NUMA node 8
Memory at 620c080020000 (32-bit, non-prefetchable) [size=128]
I/O ports at <unassigned> [disabled]
Memory at 620c080030000 (32-bit, non-prefetchable) [size=64K]
Capabilities: [50] Power Management version 2
Kernel driver in use: defxx
Kernel modules: defxx

#

Regardless the driver goes ahead and requests it (here observed with a
Raptor Talos II POWER9 system), resulting in an odd /proc/ioport entry:

# cat /proc/ioports
00000000-ffffffffffffffff : 0031:02:04.0
#

Furthermore, the system gets confused as the driver actually continues
and pokes at those locations, causing a flood of messages being output
to the system console by the underlying system firmware, like:

defxx: v1.11 2014/07/01  Lawrence V. Stefani and others
defxx 0031:02:04.0: enabling device (0140 -> 0142)
LPC[000]: Got SYNC no-response error. Error address reg: 0xd0010000
IPMI: dropping non severe PEL event
LPC[000]: Got SYNC no-response error. Error address reg: 0xd0010014
IPMI: dropping non severe PEL event
LPC[000]: Got SYNC no-response error. Error address reg: 0xd0010014
IPMI: dropping non severe PEL event

and so on and so on (possibly intermixed actually, as there's no locking
between the kernel and the firmware in console port access with this
particular system, but cleaned up above for clarity), and once some 10k
of such pairs of the latter two messages have been produced an interace
eventually shows up in a useless state:

0031:02:04.0: DEFPA at I/O addr = 0x0, IRQ = 57, Hardware addr = 00-00-00-00-00-00

This was not expected to happen as resource handling was added to the
driver a while ago, because it was not known at that time that a PCI
system would be possible that cannot assign port I/O resources, and
oddly enough `request_region' does not fail, which would have caught it.

Correct the problem then by checking for the length of zero for the CSR
resource and bail out gracefully refusing to register an interface if
that turns out to be the case, producing messages like:

defxx: v1.11 2014/07/01  Lawrence V. Stefani and others
0031:02:04.0: Cannot use I/O, no address set, aborting
0031:02:04.0: Recompile driver with "CONFIG_DEFXX_MMIO=y"

Keep the original check for the EISA MMIO resource as implemented,
because in that case the length is hardwired to 0x400 as a consequence
of how the compare/mask address decoding works in the ESIC chip and it
is only the base address that is set to zero if MMIO has been disabled
for the adapter in EISA configuration, which in turn could be a valid
bus address in a legacy-free system implementing PCI, especially for
port I/O.

Where the EISA MMIO resource has been disabled for the adapter in EISA
configuration this arrangement keeps producing messages like:

eisa 00:05: EISA: slot 5: DEC3002 detected
defxx: v1.11 2014/07/01  Lawrence V. Stefani and others
00:05: Cannot use MMIO, no address set, aborting
00:05: Recompile driver with "CONFIG_DEFXX_MMIO=n"
00:05: Or run ECU and set adapter's MMIO location

with the last two lines now swapped for easier handling in the driver.

There is no need to check for and catch the case of a port I/O resource
not having been assigned for EISA as the adapter uses the slot-specific
I/O space, which gets assigned by how EISA has been specified and maps
directly to the particular slot an option card has been placed in.  And
the EISA variant of the adapter has additional registers that are only
accessible via the port I/O space anyway.

While at it factor out the error message calls into helpers and fix an
argument order bug with the `pr_err' call now in `dfx_register_res_err'.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Fixes: 4d0438e56a8f ("defxx: Clean up DEFEA resource management")
Cc: stable@vger.kernel.org # v3.19+
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoMIPS: pci-rt2880: fix slot 0 configuration
Ilya Lipnitskiy [Wed, 14 Apr 2021 03:12:33 +0000 (20:12 -0700)]
MIPS: pci-rt2880: fix slot 0 configuration

commit 8e98b697006d749d745d3b174168a877bb96c500 upstream.

pci_fixup_irqs() used to call pcibios_map_irq on every PCI device, which
for RT2880 included bus 0 slot 0. After pci_fixup_irqs() got removed,
only slots/funcs with devices attached would be called. While arguably
the right thing, that left no chance for this driver to ever initialize
slot 0, effectively bricking PCI and USB on RT2880 devices such as the
Belkin F5D8235-4 v1.

Slot 0 configuration needs to happen after PCI bus enumeration, but
before any device at slot 0x11 (func 0 or 1) is talked to. That was
determined empirically by testing on a Belkin F5D8235-4 v1 device. A
minimal BAR 0 config write followed by read, then setting slot 0
PCI_COMMAND to MASTER | IO | MEMORY is all that seems to be required for
proper functionality.

Tested by ensuring that full- and high-speed USB devices get enumerated
on the Belkin F5D8235-4 v1 (with an out of tree DTS file from OpenWrt).

Fixes: 04c81c7293df ("MIPS: PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks")
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Tobias Wolf <dev-NTEO@vplace.de>
Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoMIPS: pci-mt7620: fix PLL lock check
Ilya Lipnitskiy [Sun, 7 Mar 2021 04:17:24 +0000 (20:17 -0800)]
MIPS: pci-mt7620: fix PLL lock check

commit c15b99ae2ba9ea30da3c7cd4765b8a4707e530a6 upstream.

Upstream a long-standing OpenWrt patch [0] that fixes MT7620 PCIe PLL
lock check. The existing code checks the wrong register bit: PPLL_SW_SET
is not defined in PPLL_CFG1 and bit 31 of PPLL_CFG1 is marked as reserved
in the MT7620 Programming Guide. The correct bit to check for PLL lock
is PPLL_LD (bit 23).

Also reword the error message for clarity.

Without this change it is unlikely that this driver ever worked with
mainline kernel.

[0]: https://lists.infradead.org/pipermail/lede-commits/2017-July/004441.html

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: John Crispin <john@phrozen.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoASoC: samsung: tm2_wm5110: check of of_parse return value
Pierre-Louis Bossart [Fri, 12 Mar 2021 18:02:30 +0000 (12:02 -0600)]
ASoC: samsung: tm2_wm5110: check of of_parse return value

commit d58970da324732686529655c21791cef0ee547c4 upstream.

cppcheck warning:

sound/soc/samsung/tm2_wm5110.c:605:6: style: Variable 'ret' is
reassigned a value before the old one has been
used. [redundantAssignment]
 ret = devm_snd_soc_register_component(dev, &tm2_component,
     ^
sound/soc/samsung/tm2_wm5110.c:554:7: note: ret is assigned
  ret = of_parse_phandle_with_args(dev->of_node, "i2s-controller",
      ^
sound/soc/samsung/tm2_wm5110.c:605:6: note: ret is overwritten
 ret = devm_snd_soc_register_component(dev, &tm2_component,
     ^

The args is a stack variable, so it could have junk (uninitialized)
therefore args.np could have a non-NULL and random value even though
property was missing. Later could trigger invalid pointer dereference.

There's no need to check for args.np because args.np won't be
initialized on errors.

Fixes: 8d1513cef51a ("ASoC: samsung: Add support for HDMI audio on TM2 board")
Cc: <stable@vger.kernel.org>
Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210312180231.2741-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agonet/nfc: fix use-after-free llcp_sock_bind/connect
Or Cohen [Tue, 4 May 2021 07:16:46 +0000 (10:16 +0300)]
net/nfc: fix use-after-free llcp_sock_bind/connect

commit c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6 upstream.

Commits 8a4cd82d ("nfc: fix refcount leak in llcp_sock_connect()")
and c33b1cc62 ("nfc: fix refcount leak in llcp_sock_bind()")
fixed a refcount leak bug in bind/connect but introduced a
use-after-free if the same local is assigned to 2 different sockets.

This can be triggered by the following simple program:
    int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );
    int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );
    memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) );
    addr.sa_family = AF_NFC;
    addr.nfc_protocol = NFC_PROTO_NFC_DEP;
    bind( sock1, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )
    bind( sock2, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )
    close(sock1);
    close(sock2);

Fix this by assigning NULL to llcp_sock->local after calling
nfc_llcp_local_put.

This addresses CVE-2021-23134.

Reported-by: Or Cohen <orcohen@paloaltonetworks.com>
Reported-by: Nadav Markus <nmarkus@paloaltonetworks.com>
Fixes: c33b1cc62 ("nfc: fix refcount leak in llcp_sock_bind()")
Signed-off-by: Or Cohen <orcohen@paloaltonetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agobluetooth: eliminate the potential race condition when removing the HCI controller
Lin Ma [Mon, 12 Apr 2021 11:17:57 +0000 (19:17 +0800)]
bluetooth: eliminate the potential race condition when removing the HCI controller

commit e2cb6b891ad2b8caa9131e3be70f45243df82a80 upstream.

There is a possible race condition vulnerability between issuing a HCI
command and removing the cont.  Specifically, functions hci_req_sync()
and hci_dev_do_close() can race each other like below:

thread-A in hci_req_sync()      |   thread-B in hci_dev_do_close()
                                |   hci_req_sync_lock(hdev);
test_bit(HCI_UP, &hdev->flags); |
...                             |   test_and_clear_bit(HCI_UP, &hdev->flags)
hci_req_sync_lock(hdev);        |
                                |
In this commit we alter the sequence in function hci_req_sync(). Hence,
the thread-A cannot issue th.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Cc: Marcel Holtmann <marcel@holtmann.org>
Fixes: 7c6a329e4447 ("[Bluetooth] Fix regression from using default link policy")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agohsr: use netdev_err() instead of WARN_ONCE()
Taehee Yoo [Fri, 28 Feb 2020 18:01:46 +0000 (18:01 +0000)]
hsr: use netdev_err() instead of WARN_ONCE()

commit 4b793acdca0050739b99ace6a8b9e7f717f57c6b upstream.

When HSR interface is sending a frame, it finds a node with
the destination ethernet address from the list.
If there is no node, it calls WARN_ONCE().
But, using WARN_ONCE() for this situation is a little bit overdoing.
So, in this patch, the netdev_err() is used instead.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: George Kennedy <george.kennedy@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoBluetooth: verify AMP hci_chan before amp_destroy
Archie Pusaka [Mon, 22 Mar 2021 06:03:11 +0000 (14:03 +0800)]
Bluetooth: verify AMP hci_chan before amp_destroy

commit 5c4c8c9544099bb9043a10a5318130a943e32fc3 upstream.

hci_chan can be created in 2 places: hci_loglink_complete_evt() if
it is an AMP hci_chan, or l2cap_conn_add() otherwise. In theory,
Only AMP hci_chan should be removed by a call to
hci_disconn_loglink_complete_evt(). However, the controller might mess
up, call that function, and destroy an hci_chan which is not initiated
by hci_loglink_complete_evt().

This patch adds a verification that the destroyed hci_chan must have
been init'd by hci_loglink_complete_evt().

Example crash call trace:
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xe3/0x144 lib/dump_stack.c:118
 print_address_description+0x67/0x22a mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report+0x251/0x28f mm/kasan/report.c:396
 hci_send_acl+0x3b/0x56e net/bluetooth/hci_core.c:4072
 l2cap_send_cmd+0x5af/0x5c2 net/bluetooth/l2cap_core.c:877
 l2cap_send_move_chan_cfm_icid+0x8e/0xb1 net/bluetooth/l2cap_core.c:4661
 l2cap_move_fail net/bluetooth/l2cap_core.c:5146 [inline]
 l2cap_move_channel_rsp net/bluetooth/l2cap_core.c:5185 [inline]
 l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:5464 [inline]
 l2cap_sig_channel net/bluetooth/l2cap_core.c:5799 [inline]
 l2cap_recv_frame+0x1d12/0x51aa net/bluetooth/l2cap_core.c:7023
 l2cap_recv_acldata+0x2ea/0x693 net/bluetooth/l2cap_core.c:7596
 hci_acldata_packet net/bluetooth/hci_core.c:4606 [inline]
 hci_rx_work+0x2bd/0x45e net/bluetooth/hci_core.c:4796
 process_one_work+0x6f8/0xb50 kernel/workqueue.c:2175
 worker_thread+0x4fc/0x670 kernel/workqueue.c:2321
 kthread+0x2f0/0x304 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415

Allocated by task 38:
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0x8d/0x9a mm/kasan/kasan.c:553
 kmem_cache_alloc_trace+0x102/0x129 mm/slub.c:2787
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 hci_chan_create+0x86/0x26d net/bluetooth/hci_conn.c:1674
 l2cap_conn_add.part.0+0x1c/0x814 net/bluetooth/l2cap_core.c:7062
 l2cap_conn_add net/bluetooth/l2cap_core.c:7059 [inline]
 l2cap_connect_cfm+0x134/0x852 net/bluetooth/l2cap_core.c:7381
 hci_connect_cfm+0x9d/0x122 include/net/bluetooth/hci_core.h:1404
 hci_remote_ext_features_evt net/bluetooth/hci_event.c:4161 [inline]
 hci_event_packet+0x463f/0x72fa net/bluetooth/hci_event.c:5981
 hci_rx_work+0x197/0x45e net/bluetooth/hci_core.c:4791
 process_one_work+0x6f8/0xb50 kernel/workqueue.c:2175
 worker_thread+0x4fc/0x670 kernel/workqueue.c:2321
 kthread+0x2f0/0x304 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415

Freed by task 1732:
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free mm/kasan/kasan.c:521 [inline]
 __kasan_slab_free+0x106/0x128 mm/kasan/kasan.c:493
 slab_free_hook mm/slub.c:1409 [inline]
 slab_free_freelist_hook+0xaa/0xf6 mm/slub.c:1436
 slab_free mm/slub.c:3009 [inline]
 kfree+0x182/0x21e mm/slub.c:3972
 hci_disconn_loglink_complete_evt net/bluetooth/hci_event.c:4891 [inline]
 hci_event_packet+0x6a1c/0x72fa net/bluetooth/hci_event.c:6050
 hci_rx_work+0x197/0x45e net/bluetooth/hci_core.c:4791
 process_one_work+0x6f8/0xb50 kernel/workqueue.c:2175
 worker_thread+0x4fc/0x670 kernel/workqueue.c:2321
 kthread+0x2f0/0x304 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415

The buggy address belongs to the object at ffff8881d7af9180
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
 128-byte region [ffff8881d7af9180ffff8881d7af9200)
The buggy address belongs to the page:
page:ffffea00075ebe40 count:1 mapcount:0 mapping:ffff8881da403200 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 dead000000000100 dead000000000200 ffff8881da403200
raw: 0000000000000000 0000000080150015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d7af9080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8881d7af9100: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8881d7af9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8881d7af9200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881d7af9280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc

Signed-off-by: Archie Pusaka <apusaka@chromium.org>
Reported-by: syzbot+98228e7407314d2d4ba2@syzkaller.appspotmail.com
Reviewed-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: George Kennedy <george.kennedy@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: inherit TAINT_PROPRIETARY_MODULE
Christoph Hellwig [Tue, 28 Jul 2020 21:33:33 +0000 (23:33 +0200)]
modules: inherit TAINT_PROPRIETARY_MODULE

commit 262e6ae7081df304fc625cf368d5c2cbba2bb991 upstream.

If a TAINT_PROPRIETARY_MODULE exports symbol, inherit the taint flag
for all modules importing these symbols, and don't allow loading
symbols from TAINT_PROPRIETARY_MODULE modules if the module previously
imported gplonly symbols.  Add a anti-circumvention devices so people
don't accidentally get themselves into trouble this way.

Comment from Greg:
  "Ah, the proven-to-be-illegal "GPL Condom" defense :)"

[jeyu: pr_info -> pr_err and pr_warn as per discussion]
Link: http://lore.kernel.org/r/20200730162957.GA22469@lst.de
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: return licensing information from find_symbol
Christoph Hellwig [Thu, 30 Jul 2020 06:10:26 +0000 (08:10 +0200)]
modules: return licensing information from find_symbol

commit ef1dac6021cc8ec5de02ce31722bf26ac4ed5523 upstream.

Report the GPLONLY status through a new argument.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: rename the licence field in struct symsearch to license
Christoph Hellwig [Thu, 30 Jul 2020 06:10:25 +0000 (08:10 +0200)]
modules: rename the licence field in struct symsearch to license

commit cd8732cdcc37d7077c4fa2c966b748c0662b607e upstream.

Use the same spelling variant as the rest of the file.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: unexport __module_address
Christoph Hellwig [Thu, 30 Jul 2020 06:10:24 +0000 (08:10 +0200)]
modules: unexport __module_address

commit 34e64705ad415ed7a816e60ef62b42fe6d1729d9 upstream.

__module_address is only used by built-in code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: unexport __module_text_address
Christoph Hellwig [Thu, 30 Jul 2020 06:10:23 +0000 (08:10 +0200)]
modules: unexport __module_text_address

commit 3fe1e56d0e68b623dd62d8d38265d2a052e7e185 upstream.

__module_text_address is only used by built-in code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: mark each_symbol_section static
Christoph Hellwig [Thu, 30 Jul 2020 06:10:22 +0000 (08:10 +0200)]
modules: mark each_symbol_section static

commit a54e04914c211b5678602a46b3ede5d82ec1327d upstream.

each_symbol_section is only used inside of module.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: mark find_symbol static
Christoph Hellwig [Thu, 30 Jul 2020 06:10:21 +0000 (08:10 +0200)]
modules: mark find_symbol static

commit 773110470e2fa3839523384ae014f8a723c4d178 upstream.

find_symbol is only used in module.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomodules: mark ref_module static
Christoph Hellwig [Thu, 30 Jul 2020 06:10:20 +0000 (08:10 +0200)]
modules: mark ref_module static

commit 7ef5264de773279b9f23b6cc8afb5addb30e970b upstream.

ref_module isn't used anywhere outside of module.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agodm rq: fix double free of blk_mq_tag_set in dev remove after table load fails
Benjamin Block [Thu, 29 Apr 2021 21:37:00 +0000 (23:37 +0200)]
dm rq: fix double free of blk_mq_tag_set in dev remove after table load fails

commit 8e947c8f4a5620df77e43c9c75310dc510250166 upstream.

When loading a device-mapper table for a request-based mapped device,
and the allocation/initialization of the blk_mq_tag_set for the device
fails, a following device remove will cause a double free.

E.g. (dmesg):
  device-mapper: core: Cannot initialize queue for request-based dm-mq mapped device
  device-mapper: ioctl: unable to set up device queue for new table.
  Unable to handle kernel pointer dereference in virtual kernel address space
  Failing address: 0305e098835de000 TEID: 0305e098835de803
  Fault in home space mode while using kernel ASCE.
  AS:000000025efe0007 R3:0000000000000024
  Oops: 0038 ilc:3 [#1] SMP
  Modules linked in: ... lots of modules ...
  Supported: Yes, External
  CPU: 0 PID: 7348 Comm: multipathd Kdump: loaded Tainted: G        W      X    5.3.18-53-default #1 SLE15-SP3
  Hardware name: IBM 8561 T01 7I2 (LPAR)
  Krnl PSW : 0704e00180000000 000000025e368eca (kfree+0x42/0x330)
             R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
  Krnl GPRS: 000000000000004a 000000025efe5230 c1773200d779968d 0000000000000000
             000000025e520270 000000025e8d1b40 0000000000000003 00000007aae10000
             000000025e5202a2 0000000000000001 c1773200d779968d 0305e098835de640
             00000007a8170000 000003ff80138650 000000025e5202a2 000003e00396faa8
  Krnl Code: 000000025e368eb8c4180041e100       lgrl    %r1,25eba50b8
             000000025e368ebeecba06b93a55       risbg   %r11,%r10,6,185,58
            #000000025e368ec4e3b010000008       ag      %r11,0(%r1)
            >000000025e368ecae310b0080004       lg      %r1,8(%r11)
             000000025e368ed0a7110001           tmll    %r1,1
             000000025e368ed4a7740129           brc     7,25e369126
             000000025e368ed8e320b0080004       lg      %r2,8(%r11)
             000000025e368edeb904001b           lgr     %r1,%r11
  Call Trace:
   [<000000025e368eca>] kfree+0x42/0x330
   [<000000025e5202a2>] blk_mq_free_tag_set+0x72/0xb8
   [<000003ff801316a8>] dm_mq_cleanup_mapped_device+0x38/0x50 [dm_mod]
   [<000003ff80120082>] free_dev+0x52/0xd0 [dm_mod]
   [<000003ff801233f0>] __dm_destroy+0x150/0x1d0 [dm_mod]
   [<000003ff8012bb9a>] dev_remove+0x162/0x1c0 [dm_mod]
   [<000003ff8012a988>] ctl_ioctl+0x198/0x478 [dm_mod]
   [<000003ff8012ac8a>] dm_ctl_ioctl+0x22/0x38 [dm_mod]
   [<000000025e3b11ee>] ksys_ioctl+0xbe/0xe0
   [<000000025e3b127a>] __s390x_sys_ioctl+0x2a/0x40
   [<000000025e8c15ac>] system_call+0xd8/0x2c8
  Last Breaking-Event-Address:
   [<000000025e52029c>] blk_mq_free_tag_set+0x6c/0xb8
  Kernel panic - not syncing: Fatal exception: panic_on_oops

When allocation/initialization of the blk_mq_tag_set fails in
dm_mq_init_request_queue(), it is uninitialized/freed, but the pointer
is not reset to NULL; so when dev_remove() later gets into
dm_mq_cleanup_mapped_device() it sees the pointer and tries to
uninitialize and free it again.

Fix this by setting the pointer to NULL in dm_mq_init_request_queue()
error-handling. Also set it to NULL in dm_mq_cleanup_mapped_device().

Cc: <stable@vger.kernel.org> # 4.6+
Fixes: 1c357a1e86a4 ("dm: allocate blk_mq_tag_set rather than embed in mapped_device")
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agodm space map common: fix division bug in sm_ll_find_free_block()
Joe Thornber [Tue, 13 Apr 2021 08:11:53 +0000 (09:11 +0100)]
dm space map common: fix division bug in sm_ll_find_free_block()

commit 5208692e80a1f3c8ce2063a22b675dd5589d1d80 upstream.

This division bug meant the search for free metadata space could skip
the final allocation bitmap's worth of entries. Fix affects DM thinp,
cache and era targets.

Cc: stable@vger.kernel.org
Signed-off-by: Joe Thornber <ejt@redhat.com>
Tested-by: Ming-Hung Tsai <mtsai@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agodm persistent data: packed struct should have an aligned() attribute too
Joe Thornber [Mon, 29 Mar 2021 15:34:57 +0000 (16:34 +0100)]
dm persistent data: packed struct should have an aligned() attribute too

commit a88b2358f1da2c9f9fcc432f2e0a79617fea397c upstream.

Otherwise most non-x86 architectures (e.g. riscv, arm) will resort to
byte-by-byte access.

Cc: stable@vger.kernel.org
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agotracing: Restructure trace_clock_global() to never block
Steven Rostedt (VMware) [Fri, 30 Apr 2021 16:17:58 +0000 (12:17 -0400)]
tracing: Restructure trace_clock_global() to never block

commit aafe104aa9096827a429bc1358f8260ee565b7cc upstream.

It was reported that a fix to the ring buffer recursion detection would
cause a hung machine when performing suspend / resume testing. The
following backtrace was extracted from debugging that case:

Call Trace:
 trace_clock_global+0x91/0xa0
 __rb_reserve_next+0x237/0x460
 ring_buffer_lock_reserve+0x12a/0x3f0
 trace_buffer_lock_reserve+0x10/0x50
 __trace_graph_return+0x1f/0x80
 trace_graph_return+0xb7/0xf0
 ? trace_clock_global+0x91/0xa0
 ftrace_return_to_handler+0x8b/0xf0
 ? pv_hash+0xa0/0xa0
 return_to_handler+0x15/0x30
 ? ftrace_graph_caller+0xa0/0xa0
 ? trace_clock_global+0x91/0xa0
 ? __rb_reserve_next+0x237/0x460
 ? ring_buffer_lock_reserve+0x12a/0x3f0
 ? trace_event_buffer_lock_reserve+0x3c/0x120
 ? trace_event_buffer_reserve+0x6b/0xc0
 ? trace_event_raw_event_device_pm_callback_start+0x125/0x2d0
 ? dpm_run_callback+0x3b/0xc0
 ? pm_ops_is_empty+0x50/0x50
 ? platform_get_irq_byname_optional+0x90/0x90
 ? trace_device_pm_callback_start+0x82/0xd0
 ? dpm_run_callback+0x49/0xc0

With the following RIP:

RIP: 0010:native_queued_spin_lock_slowpath+0x69/0x200

Since the fix to the recursion detection would allow a single recursion to
happen while tracing, this lead to the trace_clock_global() taking a spin
lock and then trying to take it again:

ring_buffer_lock_reserve() {
  trace_clock_global() {
    arch_spin_lock() {
      queued_spin_lock_slowpath() {
        /* lock taken */
        (something else gets traced by function graph tracer)
          ring_buffer_lock_reserve() {
            trace_clock_global() {
              arch_spin_lock() {
                queued_spin_lock_slowpath() {
                /* DEAD LOCK! */

Tracing should *never* block, as it can lead to strange lockups like the
above.

Restructure the trace_clock_global() code to instead of simply taking a
lock to update the recorded "prev_time" simply use it, as two events
happening on two different CPUs that calls this at the same time, really
doesn't matter which one goes first. Use a trylock to grab the lock for
updating the prev_time, and if it fails, simply try again the next time.
If it failed to be taken, that means something else is already updating
it.

Link: https://lkml.kernel.org/r/20210430121758.650b6e8a@gandalf.local.home
Cc: stable@vger.kernel.org
Tested-by: Konstantin Kharlamov <hi-angel@yandex.ru>
Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Fixes: b02414c8f045 ("ring-buffer: Fix recursion protection transitions between interrupt context") # started showing the problem
Fixes: 14131f2f98ac3 ("tracing: implement trace_clock_*() APIs") # where the bug happened
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212761
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agotracing: Map all PIDs to command lines
Steven Rostedt (VMware) [Tue, 27 Apr 2021 15:32:07 +0000 (11:32 -0400)]
tracing: Map all PIDs to command lines

commit 785e3c0a3a870e72dc530856136ab4c8dd207128 upstream.

The default max PID is set by PID_MAX_DEFAULT, and the tracing
infrastructure uses this number to map PIDs to the comm names of the
tasks, such output of the trace can show names from the recorded PIDs in
the ring buffer. This mapping is also exported to user space via the
"saved_cmdlines" file in the tracefs directory.

But currently the mapping expects the PIDs to be less than
PID_MAX_DEFAULT, which is the default maximum and not the real maximum.
Recently, systemd will increases the maximum value of a PID on the system,
and when tasks are traced that have a PID higher than PID_MAX_DEFAULT, its
comm is not recorded. This leads to the entire trace to have "<...>" as
the comm name, which is pretty useless.

Instead, keep the array mapping the size of PID_MAX_DEFAULT, but instead
of just mapping the index to the comm, map a mask of the PID
(PID_MAX_DEFAULT - 1) to the comm, and find the full PID from the
map_cmdline_to_pid array (that already exists).

This bug goes back to the beginning of ftrace, but hasn't been an issue
until user space started increasing the maximum value of PIDs.

Link: https://lkml.kernel.org/r/20210427113207.3c601884@gandalf.local.home
Cc: stable@vger.kernel.org
Fixes: bc0c38d139ec7 ("ftrace: latency tracer infrastructure")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agorsi: Use resume_noirq for SDIO
Marek Vasut [Sat, 27 Mar 2021 23:59:32 +0000 (00:59 +0100)]
rsi: Use resume_noirq for SDIO

commit c434e5e48dc4e626364491455f97e2db0aa137b1 upstream.

The rsi_resume() does access the bus to enable interrupts on the RSI
SDIO WiFi card, however when calling sdio_claim_host() in the resume
path, it is possible the bus is already claimed and sdio_claim_host()
spins indefinitelly. Enable the SDIO card interrupts in resume_noirq
instead to prevent anything else from claiming the SDIO bus first.

Fixes: 20db07332736 ("rsi: sdio suspend and resume support")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Cc: Angus Ainslie <angus@akkea.ca>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Karun Eagalapati <karun256@gmail.com>
Cc: Martin Kepplinger <martink@posteo.de>
Cc: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Cc: Siva Rebbagondla <siva8118@gmail.com>
Cc: netdev@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210327235932.175896-1-marex@denx.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agotty: fix memory leak in vc_deallocate
Pavel Skripkin [Sat, 27 Mar 2021 21:44:43 +0000 (00:44 +0300)]
tty: fix memory leak in vc_deallocate

commit 211b4d42b70f1c1660feaa968dac0efc2a96ac4d upstream.

syzbot reported memory leak in tty/vt.
The problem was in VT_DISALLOCATE ioctl cmd.
After allocating unimap with PIO_UNIMAP it wasn't
freed via VT_DISALLOCATE, but vc_cons[currcons].d was
zeroed.

Reported-by: syzbot+bcc922b19ccc64240b42@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210327214443.21548-1-paskripkin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: dwc2: Fix session request interrupt handler
Artur Petrosyan [Thu, 8 Apr 2021 09:45:49 +0000 (13:45 +0400)]
usb: dwc2: Fix session request interrupt handler

commit 42b32b164acecd850edef010915a02418345a033 upstream.

According to programming guide in host mode, port
power must be turned on in session request
interrupt handlers.

Fixes: 21795c826a45 ("usb: dwc2: exit hibernation on session request")
Cc: <stable@vger.kernel.org>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094550.75484A0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: dwc3: gadget: Fix START_TRANSFER link state check
Thinh Nguyen [Tue, 20 Apr 2021 02:11:12 +0000 (19:11 -0700)]
usb: dwc3: gadget: Fix START_TRANSFER link state check

commit c560e76319a94a3b9285bc426c609903408e4826 upstream.

The START_TRANSFER command needs to be executed while in ON/U0 link
state (with an exception during register initialization). Don't use
dwc->link_state to check this since the driver only tracks the link
state when the link state change interrupt is enabled. Check the link
state from DSTS register instead.

Note that often the host already brings the device out of low power
before it sends/requests the next transfer. So, the user won't see any
issue when the device starts transfer then. This issue is more
noticeable in cases when the device delays starting transfer, which can
happen during delayed control status after the host put the device in
low power.

Fixes: 799e9dc82968 ("usb: dwc3: gadget: conditionally disable Link State change events")
Cc: <stable@vger.kernel.org>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/bcefaa9ecbc3e1936858c0baa14de6612960e909.1618884221.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: gadget/function/f_fs string table fix for multiple languages
Dean Anderson [Wed, 17 Mar 2021 22:41:09 +0000 (15:41 -0700)]
usb: gadget/function/f_fs string table fix for multiple languages

commit 55b74ce7d2ce0b0058f3e08cab185a0afacfe39e upstream.

Fixes bug with the handling of more than one language in
the string table in f_fs.c.
str_count was not reset for subsequent language codes.
str_count-- "rolls under" and processes u32 max strings on
the processing of the second language entry.
The existing bug can be reproduced by adding a second language table
to the structure "strings" in tools/usb/ffs-test.c.

Signed-off-by: Dean Anderson <dean@sensoray.com>
Link: https://lore.kernel.org/r/20210317224109.21534-1-dean@sensoray.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: gadget: Fix double free of device descriptor pointers
Hemant Kumar [Wed, 21 Apr 2021 19:47:32 +0000 (12:47 -0700)]
usb: gadget: Fix double free of device descriptor pointers

commit 43c4cab006f55b6ca549dd1214e22f5965a8675f upstream.

Upon driver unbind usb_free_all_descriptors() function frees all
speed descriptor pointers without setting them to NULL. In case
gadget speed changes (i.e from super speed plus to super speed)
after driver unbind only upto super speed descriptor pointers get
populated. Super speed plus desc still holds the stale (already
freed) pointer. Fix this issue by setting all descriptor pointers
to NULL after freeing them in usb_free_all_descriptors().

Fixes: f5c61225cf29 ("usb: gadget: Update function for SuperSpeedPlus")
cc: stable@vger.kernel.org
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1619034452-17334-1-git-send-email-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: gadget: dummy_hcd: fix gpf in gadget_setup
Anirudh Rayabharam [Mon, 19 Apr 2021 03:37:08 +0000 (09:07 +0530)]
usb: gadget: dummy_hcd: fix gpf in gadget_setup

commit 4a5d797a9f9c4f18585544237216d7812686a71f upstream.

Fix a general protection fault reported by syzbot due to a race between
gadget_setup() and gadget_unbind() in raw_gadget.

The gadget core is supposed to guarantee that there won't be any more
callbacks to the gadget driver once the driver's unbind routine is
called. That guarantee is enforced in usb_gadget_remove_driver as
follows:

        usb_gadget_disconnect(udc->gadget);
        if (udc->gadget->irq)
                synchronize_irq(udc->gadget->irq);
        udc->driver->unbind(udc->gadget);
        usb_gadget_udc_stop(udc);

usb_gadget_disconnect turns off the pullup resistor, telling the host
that the gadget is no longer connected and preventing the transmission
of any more USB packets. Any packets that have already been received
are sure to processed by the UDC driver's interrupt handler by the time
synchronize_irq returns.

But this doesn't work with dummy_hcd, because dummy_hcd doesn't use
interrupts; it uses a timer instead. It does have code to emulate the
effect of synchronize_irq, but that code doesn't get invoked at the
right time -- it currently runs in usb_gadget_udc_stop, after the unbind
callback instead of before. Indeed, there's no way for
usb_gadget_remove_driver to invoke this code before the unbind callback.

To fix this, move the synchronize_irq() emulation code to dummy_pullup
so that it runs before unbind. Also, add a comment explaining why it is
necessary to have it there.

Reported-by: syzbot+eb4674092e6cc8d9e0bd@syzkaller.appspotmail.com
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Link: https://lore.kernel.org/r/20210419033713.3021-1-mail@anirudhrb.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomedia: dvbdev: Fix memory leak in dvb_media_device_free()
Peilin Ye [Fri, 11 Dec 2020 08:30:39 +0000 (09:30 +0100)]
media: dvbdev: Fix memory leak in dvb_media_device_free()

commit bf9a40ae8d722f281a2721779595d6df1c33a0bf upstream.

dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn`
before setting it to NULL, as documented in include/media/media-device.h:
"The media_entity instance itself must be freed explicitly by the driver
if required."

Link: https://syzkaller.appspot.com/bug?id=9bbe4b842c98f0ed05c5eed77a226e9de33bf298
Link: https://lore.kernel.org/linux-media/20201211083039.521617-1-yepeilin.cs@gmail.com
Cc: stable@vger.kernel.org
Fixes: 0230d60e4661 ("[media] dvbdev: Add RF connector if needed")
Reported-by: syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoext4: fix error code in ext4_commit_super
Fengnan Chang [Fri, 2 Apr 2021 10:16:31 +0000 (18:16 +0800)]
ext4: fix error code in ext4_commit_super

commit f88f1466e2a2e5ca17dfada436d3efa1b03a3972 upstream.

We should set the error code when ext4_commit_super check argument failed.
Found in code review.
Fixes: c4be0c1dc4cdc ("filesystem freeze: add error handling of write_super_lockfs/unlockfs").

Cc: stable@kernel.org
Signed-off-by: Fengnan Chang <changfengnan@vivo.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20210402101631.561-1-changfengnan@vivo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoext4: do not set SB_ACTIVE in ext4_orphan_cleanup()
Zhang Yi [Wed, 31 Mar 2021 03:31:38 +0000 (11:31 +0800)]
ext4: do not set SB_ACTIVE in ext4_orphan_cleanup()

commit 72ffb49a7b623c92a37657eda7cc46a06d3e8398 upstream.

When CONFIG_QUOTA is enabled, if we failed to mount the filesystem due
to some error happens behind ext4_orphan_cleanup(), it will end up
triggering a after free issue of super_block. The problem is that
ext4_orphan_cleanup() will set SB_ACTIVE flag if CONFIG_QUOTA is
enabled, after we cleanup the truncated inodes, the last iput() will put
them into the lru list, and these inodes' pages may probably dirty and
will be write back by the writeback thread, so it could be raced by
freeing super_block in the error path of mount_bdev().

After check the setting of SB_ACTIVE flag in ext4_orphan_cleanup(), it
was used to ensure updating the quota file properly, but evict inode and
trash data immediately in the last iput does not affect the quotafile,
so setting the SB_ACTIVE flag seems not required[1]. Fix this issue by
just remove the SB_ACTIVE setting.

[1] https://lore.kernel.org/linux-ext4/99cce8ca-e4a0-7301-840f-2ace67c551f3@huawei.com/T/#m04990cfbc4f44592421736b504afcc346b2a7c00

Cc: stable@kernel.org
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Tested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210331033138.918975-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoext4: fix check to prevent false positive report of incorrect used inodes
Zhang Yi [Wed, 31 Mar 2021 12:15:16 +0000 (20:15 +0800)]
ext4: fix check to prevent false positive report of incorrect used inodes

commit a149d2a5cabbf6507a7832a1c4fd2593c55fd450 upstream.

Commit <50122847007> ("ext4: fix check to prevent initializing reserved
inodes") check the block group zero and prevent initializing reserved
inodes. But in some special cases, the reserved inode may not all belong
to the group zero, it may exist into the second group if we format
filesystem below.

  mkfs.ext4 -b 4096 -g 8192 -N 1024 -I 4096 /dev/sda

So, it will end up triggering a false positive report of a corrupted
file system. This patch fix it by avoid check reserved inodes if no free
inode blocks will be zeroed.

Cc: stable@kernel.org
Fixes: 50122847007 ("ext4: fix check to prevent initializing reserved inodes")
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Suggested-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210331121516.2243099-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoarm64: vdso: remove commas between macro name and arguments
Jian Cai [Thu, 6 May 2021 01:25:08 +0000 (18:25 -0700)]
arm64: vdso: remove commas between macro name and arguments

LLVM's integrated assembler appears to assume an argument with default
value is passed whenever it sees a comma right after the macro name.
It will be fine if the number of following arguments is one less than
the number of parameters specified in the macro definition. Otherwise,
it fails. For example, the following code works:

$ cat foo.s
.macro  foo arg1=2, arg2=4
        ldr r0, [r1, #\arg1]
        ldr r0, [r1, #\arg2]
.endm

foo, arg2=8

$ llvm-mc -triple=armv7a -filetype=obj foo.s -o ias.o
arm-linux-gnueabihf-objdump -dr ias.o

ias.o:     file format elf32-littlearm

Disassembly of section .text:

00000000 <.text>:
   0: e5910001 ldr r0, [r1, #2]
   4: e5910003 ldr r0, [r1, #8]

While the the following code would fail:

$ cat foo.s
.macro  foo arg1=2, arg2=4
        ldr r0, [r1, #\arg1]
        ldr r0, [r1, #\arg2]
.endm

foo, arg1=2, arg2=8

$ llvm-mc -triple=armv7a -filetype=obj foo.s -o ias.o
foo.s:6:14: error: too many positional arguments
foo, arg1=2, arg2=8

This causes build failures as follows:

arch/arm64/kernel/vdso/gettimeofday.S:230:24: error: too many positional
arguments
 clock_gettime_return, shift=1
                       ^
arch/arm64/kernel/vdso/gettimeofday.S:253:24: error: too many positional
arguments
 clock_gettime_return, shift=1
                       ^
arch/arm64/kernel/vdso/gettimeofday.S:274:24: error: too many positional
arguments
 clock_gettime_return, shift=1

This error is not in mainline because commit 28b1a824a4f4 ("arm64: vdso:
Substitute gettimeofday() with C implementation") rewrote this assembler
file in C as part of a 25 patch series that is unsuitable for stable.
Just remove the comma in the clock_gettime_return invocations in 4.19 so
that GNU as and LLVM's integrated assembler work the same.

Link:
https://github.com/ClangBuiltLinux/linux/issues/1349

Suggested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Jian Cai <jiancai@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoposix-timers: Preserve return value in clock_adjtime32()
Chen Jun [Wed, 14 Apr 2021 03:04:49 +0000 (03:04 +0000)]
posix-timers: Preserve return value in clock_adjtime32()

commit 2d036dfa5f10df9782f5278fc591d79d283c1fad upstream.

The return value on success (>= 0) is overwritten by the return value of
put_old_timex32(). That works correct in the fault case, but is wrong for
the success case where put_old_timex32() returns 0.

Just check the return value of put_old_timex32() and return -EFAULT in case
it is not zero.

[ tglx: Massage changelog ]

Fixes: 3a4d44b61625 ("ntp: Move adjtimex related compat syscalls to native counterparts")
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Cochran <richardcochran@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210414030449.90692-1-chenjun102@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoRevert 337f13046ff0 ("futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op")
Thomas Gleixner [Thu, 22 Apr 2021 19:44:18 +0000 (21:44 +0200)]
Revert 337f13046ff0 ("futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op")

commit 4fbf5d6837bf81fd7a27d771358f4ee6c4f243f8 upstream.

The FUTEX_WAIT operand has historically a relative timeout which means that
the clock id is irrelevant as relative timeouts on CLOCK_REALTIME are not
subject to wall clock changes and therefore are mapped by the kernel to
CLOCK_MONOTONIC for simplicity.

If a caller would set FUTEX_CLOCK_REALTIME for FUTEX_WAIT the timeout is
still treated relative vs. CLOCK_MONOTONIC and then the wait arms that
timeout based on CLOCK_REALTIME which is broken and obviously has never
been used or even tested.

Reject any attempt to use FUTEX_CLOCK_REALTIME with FUTEX_WAIT again.

The desired functionality can be achieved with FUTEX_WAIT_BITSET and a
FUTEX_BITSET_MATCH_ANY argument.

Fixes: 337f13046ff0 ("futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210422194704.834797921@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agojffs2: check the validity of dstlen in jffs2_zlib_compress()
Yang Yang [Thu, 28 Jan 2021 10:55:35 +0000 (02:55 -0800)]
jffs2: check the validity of dstlen in jffs2_zlib_compress()

commit 90ada91f4610c5ef11bc52576516d96c496fc3f1 upstream.

KASAN reports a BUG when download file in jffs2 filesystem.It is
because when dstlen == 1, cpage_out will write array out of bounds.
Actually, data will not be compressed in jffs2_zlib_compress() if
data's length less than 4.

[  393.799778] BUG: KASAN: slab-out-of-bounds in jffs2_rtime_compress+0x214/0x2f0 at addr ffff800062e3b281
[  393.809166] Write of size 1 by task tftp/2918
[  393.813526] CPU: 3 PID: 2918 Comm: tftp Tainted: G    B           4.9.115-rt93-EMBSYS-CGEL-6.1.R6-dirty #1
[  393.823173] Hardware name: LS1043A RDB Board (DT)
[  393.827870] Call trace:
[  393.830322] [<ffff20000808c700>] dump_backtrace+0x0/0x2f0
[  393.835721] [<ffff20000808ca04>] show_stack+0x14/0x20
[  393.840774] [<ffff2000086ef700>] dump_stack+0x90/0xb0
[  393.845829] [<ffff20000827b19c>] kasan_object_err+0x24/0x80
[  393.851402] [<ffff20000827b404>] kasan_report_error+0x1b4/0x4d8
[  393.857323] [<ffff20000827bae8>] kasan_report+0x38/0x40
[  393.862548] [<ffff200008279d44>] __asan_store1+0x4c/0x58
[  393.867859] [<ffff2000084ce2ec>] jffs2_rtime_compress+0x214/0x2f0
[  393.873955] [<ffff2000084bb3b0>] jffs2_selected_compress+0x178/0x2a0
[  393.880308] [<ffff2000084bb530>] jffs2_compress+0x58/0x478
[  393.885796] [<ffff2000084c5b34>] jffs2_write_inode_range+0x13c/0x450
[  393.892150] [<ffff2000084be0b8>] jffs2_write_end+0x2a8/0x4a0
[  393.897811] [<ffff2000081f3008>] generic_perform_write+0x1c0/0x280
[  393.903990] [<ffff2000081f5074>] __generic_file_write_iter+0x1c4/0x228
[  393.910517] [<ffff2000081f5210>] generic_file_write_iter+0x138/0x288
[  393.916870] [<ffff20000829ec1c>] __vfs_write+0x1b4/0x238
[  393.922181] [<ffff20000829ff00>] vfs_write+0xd0/0x238
[  393.927232] [<ffff2000082a1ba8>] SyS_write+0xa0/0x110
[  393.932283] [<ffff20000808429c>] __sys_trace_return+0x0/0x4
[  393.937851] Object at ffff800062e3b280, in cache kmalloc-64 size: 64
[  393.944197] Allocated:
[  393.946552] PID = 2918
[  393.948913]  save_stack_trace_tsk+0x0/0x220
[  393.953096]  save_stack_trace+0x18/0x20
[  393.956932]  kasan_kmalloc+0xd8/0x188
[  393.960594]  __kmalloc+0x144/0x238
[  393.963994]  jffs2_selected_compress+0x48/0x2a0
[  393.968524]  jffs2_compress+0x58/0x478
[  393.972273]  jffs2_write_inode_range+0x13c/0x450
[  393.976889]  jffs2_write_end+0x2a8/0x4a0
[  393.980810]  generic_perform_write+0x1c0/0x280
[  393.985251]  __generic_file_write_iter+0x1c4/0x228
[  393.990040]  generic_file_write_iter+0x138/0x288
[  393.994655]  __vfs_write+0x1b4/0x238
[  393.998228]  vfs_write+0xd0/0x238
[  394.001543]  SyS_write+0xa0/0x110
[  394.004856]  __sys_trace_return+0x0/0x4
[  394.008684] Freed:
[  394.010691] PID = 2918
[  394.013051]  save_stack_trace_tsk+0x0/0x220
[  394.017233]  save_stack_trace+0x18/0x20
[  394.021069]  kasan_slab_free+0x88/0x188
[  394.024902]  kfree+0x6c/0x1d8
[  394.027868]  jffs2_sum_write_sumnode+0x2c4/0x880
[  394.032486]  jffs2_do_reserve_space+0x198/0x598
[  394.037016]  jffs2_reserve_space+0x3f8/0x4d8
[  394.041286]  jffs2_write_inode_range+0xf0/0x450
[  394.045816]  jffs2_write_end+0x2a8/0x4a0
[  394.049737]  generic_perform_write+0x1c0/0x280
[  394.054179]  __generic_file_write_iter+0x1c4/0x228
[  394.058968]  generic_file_write_iter+0x138/0x288
[  394.063583]  __vfs_write+0x1b4/0x238
[  394.067157]  vfs_write+0xd0/0x238
[  394.070470]  SyS_write+0xa0/0x110
[  394.073783]  __sys_trace_return+0x0/0x4
[  394.077612] Memory state around the buggy address:
[  394.082404]  ffff800062e3b180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[  394.089623]  ffff800062e3b200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[  394.096842] >ffff800062e3b280: 01 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  394.104056]                    ^
[  394.107283]  ffff800062e3b300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[  394.114502]  ffff800062e3b380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[  394.121718] ==================================================================

Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Cc: Joel Stanley <joel@jms.id.au>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoFix misc new gcc warnings
Linus Torvalds [Wed, 28 Apr 2021 00:05:53 +0000 (17:05 -0700)]
Fix misc new gcc warnings

commit e7c6e405e171fb33990a12ecfd14e6500d9e5cf2 upstream.

It seems like Fedora 34 ends up enabling a few new gcc warnings, notably
"-Wstringop-overread" and "-Warray-parameter".

Both of them cause what seem to be valid warnings in the kernel, where
we have array size mismatches in function arguments (that are no longer
just silently converted to a pointer to element, but actually checked).

This fixes most of the trivial ones, by making the function declaration
match the function definition, and in the case of intel_pm.c, removing
the over-specified array size from the argument declaration.

At least one 'stringop-overread' warning remains in the i915 driver, but
that one doesn't have the same obvious trivial fix, and may or may not
actually be indicative of a bug.

[ It was a mistake to upgrade one of my machines to Fedora 34 while
  being busy with the merge window, but if this is the extent of the
  compiler upgrade problems, things are better than usual    - Linus ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrey Zhizhikin <andrey.z@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agosecurity: commoncap: fix -Wstringop-overread warning
Arnd Bergmann [Mon, 22 Mar 2021 16:02:41 +0000 (17:02 +0100)]
security: commoncap: fix -Wstringop-overread warning

commit 82e5d8cc768b0c7b03c551a9ab1f8f3f68d5f83f upstream.

gcc-11 introdces a harmless warning for cap_inode_getsecurity:

security/commoncap.c: In function â€˜cap_inode_getsecurity’:
security/commoncap.c:440:33: error: â€˜memcpy’ reading 16 bytes from a region of size 0 [-Werror=stringop-overread]
  440 |                                 memcpy(&nscap->data, &cap->data, sizeof(__le32) * 2 * VFS_CAP_U32);
      |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The problem here is that tmpbuf is initialized to NULL, so gcc assumes
it is not accessible unless it gets set by vfs_getxattr_alloc().  This is
a legitimate warning as far as I can tell, but the code is correct since
it correctly handles the error when that function fails.

Add a separate NULL check to tell gcc about it as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: James Morris <jamorris@linux.microsoft.com>
Cc: Andrey Zhizhikin <andrey.z@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agodm raid: fix inconclusive reshape layout on fast raid4/5/6 table reload sequences
Heinz Mauelshagen [Wed, 21 Apr 2021 21:32:36 +0000 (23:32 +0200)]
dm raid: fix inconclusive reshape layout on fast raid4/5/6 table reload sequences

commit f99a8e4373eeacb279bc9696937a55adbff7a28a upstream.

If fast table reloads occur during an ongoing reshape of raid4/5/6
devices the target may race reading a superblock vs the the MD resync
thread; causing an inconclusive reshape state to be read in its
constructor.

lvm2 test lvconvert-raid-reshape-stripes-load-reload.sh can cause
BUG_ON() to trigger in md_run(), e.g.:
"kernel BUG at drivers/md/raid5.c:7567!".

Scenario triggering the bug:

1. the MD sync thread calls end_reshape() from raid5_sync_request()
   when done reshaping. However end_reshape() _only_ updates the
   reshape position to MaxSector keeping the changed layout
   configuration though (i.e. any delta disks, chunk sector or RAID
   algorithm changes). That inconclusive configuration is stored in
   the superblock.

2. dm-raid constructs a mapping, loading named inconsistent superblock
   as of step 1 before step 3 is able to finish resetting the reshape
   state completely, and calls md_run() which leads to mentioned bug
   in raid5.c.

3. the MD RAID personality's finish_reshape() is called; which resets
   the reshape information on chunk sectors, delta disks, etc. This
   explains why the bug is rarely seen on multi-core machines, as MD's
   finish_reshape() superblock update races with the dm-raid
   constructor's superblock load in step 2.

Fix identifies inconclusive superblock content in the dm-raid
constructor and resets it before calling md_run(), factoring out
identifying checks into rs_is_layout_change() to share in existing
rs_reshape_requested() and new rs_reset_inclonclusive_reshape(). Also
enhance a comment and remove an empty line.

Cc: stable@vger.kernel.org
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomd/raid1: properly indicate failure when ending a failed write request
Paul Clements [Thu, 15 Apr 2021 21:17:57 +0000 (17:17 -0400)]
md/raid1: properly indicate failure when ending a failed write request

commit 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd upstream.

This patch addresses a data corruption bug in raid1 arrays using bitmaps.
Without this fix, the bitmap bits for the failed I/O end up being cleared.

Since we are in the failure leg of raid1_end_write_request, the request
either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).

Fixes: eeba6809d8d5 ("md/raid1: end bio when the device faulty")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Paul Clements <paul.clements@us.sios.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agotpm: vtpm_proxy: Avoid reading host log when using a virtual device
Stefan Berger [Wed, 10 Mar 2021 22:19:16 +0000 (17:19 -0500)]
tpm: vtpm_proxy: Avoid reading host log when using a virtual device

commit 9716ac65efc8f780549b03bddf41e60c445d4709 upstream.

Avoid allocating memory and reading the host log when a virtual device
is used since this log is of no use to that driver. A virtual
device can be identified through the flag TPM_CHIP_FLAG_VIRTUAL, which
is only set for the tpm_vtpm_proxy driver.

Cc: stable@vger.kernel.org
Fixes: 6f99612e2500 ("tpm: Proxy driver for supporting multiple emulated TPMs")
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agointel_th: pci: Add Alder Lake-M support
Alexander Shishkin [Wed, 14 Apr 2021 17:12:51 +0000 (20:12 +0300)]
intel_th: pci: Add Alder Lake-M support

commit 48cb17531b15967d9d3f34c770a25cc6c4ca6ad1 upstream.

This adds support for the Trace Hub in Alder Lake-M PCH.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org # v4.14+
Link: https://lore.kernel.org/r/20210414171251.14672-8-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agopowerpc: fix EDEADLOCK redefinition error in uapi/asm/errno.h
Tony Ambardar [Thu, 17 Sep 2020 13:54:37 +0000 (06:54 -0700)]
powerpc: fix EDEADLOCK redefinition error in uapi/asm/errno.h

commit 7de21e679e6a789f3729e8402bc440b623a28eae upstream.

A few archs like powerpc have different errno.h values for macros
EDEADLOCK and EDEADLK. In code including both libc and linux versions of
errno.h, this can result in multiple definitions of EDEADLOCK in the
include chain. Definitions to the same value (e.g. seen with mips) do
not raise warnings, but on powerpc there are redefinitions changing the
value, which raise warnings and errors (if using "-Werror").

Guard against these redefinitions to avoid build errors like the following,
first seen cross-compiling libbpf v5.8.9 for powerpc using GCC 8.4.0 with
musl 1.1.24:

  In file included from ../../arch/powerpc/include/uapi/asm/errno.h:5,
                   from ../../include/linux/err.h:8,
                   from libbpf.c:29:
  ../../include/uapi/asm-generic/errno.h:40: error: "EDEADLOCK" redefined [-Werror]
   #define EDEADLOCK EDEADLK

  In file included from toolchain-powerpc_8540_gcc-8.4.0_musl/include/errno.h:10,
                   from libbpf.c:26:
  toolchain-powerpc_8540_gcc-8.4.0_musl/include/bits/errno.h:58: note: this is the location of the previous definition
   #define EDEADLOCK       58

  cc1: all warnings being treated as errors

Cc: Stable <stable@vger.kernel.org>
Reported-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200917135437.1238787-1-Tony.Ambardar@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agopowerpc/eeh: Fix EEH handling for hugepages in ioremap space.
Mahesh Salgaonkar [Mon, 12 Apr 2021 07:52:50 +0000 (13:22 +0530)]
powerpc/eeh: Fix EEH handling for hugepages in ioremap space.

commit 5ae5bc12d0728db60a0aa9b62160ffc038875f1a upstream.

During the EEH MMIO error checking, the current implementation fails to map
the (virtual) MMIO address back to the pci device on radix with hugepage
mappings for I/O. This results into failure to dispatch EEH event with no
recovery even when EEH capability has been enabled on the device.

eeh_check_failure(token) # token = virtual MMIO address
  addr = eeh_token_to_phys(token);
  edev = eeh_addr_cache_get_dev(addr);
  if (!edev)
return 0;
  eeh_dev_check_failure(edev); <= Dispatch the EEH event

In case of hugepage mappings, eeh_token_to_phys() has a bug in virt -> phys
translation that results in wrong physical address, which is then passed to
eeh_addr_cache_get_dev() to match it against cached pci I/O address ranges
to get to a PCI device. Hence, it fails to find a match and the EEH event
never gets dispatched leaving the device in failed state.

The commit 33439620680be ("powerpc/eeh: Handle hugepages in ioremap space")
introduced following logic to translate virt to phys for hugepage mappings:

eeh_token_to_phys():
+ pa = pte_pfn(*ptep);
+
+ /* On radix we can do hugepage mappings for io, so handle that */
+       if (hugepage_shift) {
+               pa <<= hugepage_shift; <= This is wrong
+               pa |= token & ((1ul << hugepage_shift) - 1);
+       }

This patch fixes the virt -> phys translation in eeh_token_to_phys()
function.

  $ cat /sys/kernel/debug/powerpc/eeh_address_cache
  mem addr range [0x0000040080000000-0x00000400807fffff]: 0030:01:00.1
  mem addr range [0x0000040080800000-0x0000040080ffffff]: 0030:01:00.1
  mem addr range [0x0000040081000000-0x00000400817fffff]: 0030:01:00.0
  mem addr range [0x0000040081800000-0x0000040081ffffff]: 0030:01:00.0
  mem addr range [0x0000040082000000-0x000004008207ffff]: 0030:01:00.1
  mem addr range [0x0000040082080000-0x00000400820fffff]: 0030:01:00.0
  mem addr range [0x0000040082100000-0x000004008210ffff]: 0030:01:00.1
  mem addr range [0x0000040082110000-0x000004008211ffff]: 0030:01:00.0

Above is the list of cached io address ranges of pci 0030:01:00.<fn>.

Before this patch:

Tracing 'arg1' of function eeh_addr_cache_get_dev() during error injection
clearly shows that 'addr=' contains wrong physical address:

   kworker/u16:0-7       [001] ....   108.883775: eeh_addr_cache_get_dev:
   (eeh_addr_cache_get_dev+0xc/0xf0) addr=0x80103000a510

dmesg shows no EEH recovery messages:

  [  108.563768] bnx2x: [bnx2x_timer:5801(eth2)]MFW seems hanged: drv_pulse (0x9ae) != mcp_pulse (0x7fff)
  [  108.563788] bnx2x: [bnx2x_hw_stats_update:870(eth2)]NIG timer max (4294967295)
  [  108.883788] bnx2x: [bnx2x_acquire_hw_lock:2013(eth1)]lock_status 0xffffffff  resource_bit 0x1
  [  108.884407] bnx2x 0030:01:00.0 eth1: MDC/MDIO access timeout
  [  108.884976] bnx2x 0030:01:00.0 eth1: MDC/MDIO access timeout
  <..>

After this patch:

eeh_addr_cache_get_dev() trace shows correct physical address:

  <idle>-0       [001] ..s.  1043.123828: eeh_addr_cache_get_dev:
  (eeh_addr_cache_get_dev+0xc/0xf0) addr=0x40080bc7cd8

dmesg logs shows EEH recovery getting triggerred:

  [  964.323980] bnx2x: [bnx2x_timer:5801(eth2)]MFW seems hanged: drv_pulse (0x746f) != mcp_pulse (0x7fff)
  [  964.323991] EEH: Recovering PHB#30-PE#10000
  [  964.324002] EEH: PE location: N/A, PHB location: N/A
  [  964.324006] EEH: Frozen PHB#30-PE#10000 detected
  <..>

Fixes: 33439620680b ("powerpc/eeh: Handle hugepages in ioremap space")
Cc: stable@vger.kernel.org # v5.3+
Reported-by: Dominic DeMarco <ddemarc@us.ibm.com>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/161821396263.48361.2796709239866588652.stgit@jupiter
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agojffs2: Fix kasan slab-out-of-bounds problem
lizhe [Thu, 18 Mar 2021 03:06:57 +0000 (11:06 +0800)]
jffs2: Fix kasan slab-out-of-bounds problem

commit 960b9a8a7676b9054d8b46a2c7db52a0c8766b56 upstream.

KASAN report a slab-out-of-bounds problem. The logs are listed below.
It is because in function jffs2_scan_dirent_node, we alloc "checkedlen+1"
bytes for fd->name and we check crc with length rd->nsize. If checkedlen
is less than rd->nsize, it will cause the slab-out-of-bounds problem.

jffs2: Dirent at *** has zeroes in name. Truncating to %d char
==================================================================
BUG: KASAN: slab-out-of-bounds in crc32_le+0x1ce/0x260 at addr ffff8800842cf2d1
Read of size 1 by task test_JFFS2/915
=============================================================================
BUG kmalloc-64 (Tainted: G    B      O   ): kasan: bad access detected
-----------------------------------------------------------------------------
INFO: Allocated in jffs2_alloc_full_dirent+0x2a/0x40 age=0 cpu=1 pid=915
___slab_alloc+0x580/0x5f0
__slab_alloc.isra.24+0x4e/0x64
__kmalloc+0x170/0x300
jffs2_alloc_full_dirent+0x2a/0x40
jffs2_scan_eraseblock+0x1ca4/0x3b64
jffs2_scan_medium+0x285/0xfe0
jffs2_do_mount_fs+0x5fb/0x1bbc
jffs2_do_fill_super+0x245/0x6f0
jffs2_fill_super+0x287/0x2e0
mount_mtd_aux.isra.0+0x9a/0x144
mount_mtd+0x222/0x2f0
jffs2_mount+0x41/0x60
mount_fs+0x63/0x230
vfs_kern_mount.part.6+0x6c/0x1f4
do_mount+0xae8/0x1940
SyS_mount+0x105/0x1d0
INFO: Freed in jffs2_free_full_dirent+0x22/0x40 age=27 cpu=1 pid=915
__slab_free+0x372/0x4e4
kfree+0x1d4/0x20c
jffs2_free_full_dirent+0x22/0x40
jffs2_build_remove_unlinked_inode+0x17a/0x1e4
jffs2_do_mount_fs+0x1646/0x1bbc
jffs2_do_fill_super+0x245/0x6f0
jffs2_fill_super+0x287/0x2e0
mount_mtd_aux.isra.0+0x9a/0x144
mount_mtd+0x222/0x2f0
jffs2_mount+0x41/0x60
mount_fs+0x63/0x230
vfs_kern_mount.part.6+0x6c/0x1f4
do_mount+0xae8/0x1940
SyS_mount+0x105/0x1d0
entry_SYSCALL_64_fastpath+0x1e/0x97
Call Trace:
 [<ffffffff815befef>] dump_stack+0x59/0x7e
 [<ffffffff812d1d65>] print_trailer+0x125/0x1b0
 [<ffffffff812d82c8>] object_err+0x34/0x40
 [<ffffffff812dadef>] kasan_report.part.1+0x21f/0x534
 [<ffffffff81132401>] ? vprintk+0x2d/0x40
 [<ffffffff815f1ee2>] ? crc32_le+0x1ce/0x260
 [<ffffffff812db41a>] kasan_report+0x26/0x30
 [<ffffffff812d9fc1>] __asan_load1+0x3d/0x50
 [<ffffffff815f1ee2>] crc32_le+0x1ce/0x260
 [<ffffffff814764ae>] ? jffs2_alloc_full_dirent+0x2a/0x40
 [<ffffffff81485cec>] jffs2_scan_eraseblock+0x1d0c/0x3b64
 [<ffffffff81488813>] ? jffs2_scan_medium+0xccf/0xfe0
 [<ffffffff81483fe0>] ? jffs2_scan_make_ino_cache+0x14c/0x14c
 [<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
 [<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
 [<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
 [<ffffffff812d5d90>] ? kmem_cache_alloc_trace+0x10c/0x2cc
 [<ffffffff818169fb>] ? mtd_point+0xf7/0x130
 [<ffffffff81487dc9>] jffs2_scan_medium+0x285/0xfe0
 [<ffffffff81487b44>] ? jffs2_scan_eraseblock+0x3b64/0x3b64
 [<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
 [<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
 [<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
 [<ffffffff812d57df>] ? __kmalloc+0x12b/0x300
 [<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
 [<ffffffff814a2753>] ? jffs2_sum_init+0x9f/0x240
 [<ffffffff8148b2ff>] jffs2_do_mount_fs+0x5fb/0x1bbc
 [<ffffffff8148ad04>] ? jffs2_del_noinode_dirent+0x640/0x640
 [<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
 [<ffffffff81127c5b>] ? __init_rwsem+0x97/0xac
 [<ffffffff81492349>] jffs2_do_fill_super+0x245/0x6f0
 [<ffffffff81493c5b>] jffs2_fill_super+0x287/0x2e0
 [<ffffffff814939d4>] ? jffs2_parse_options+0x594/0x594
 [<ffffffff81819bea>] mount_mtd_aux.isra.0+0x9a/0x144
 [<ffffffff81819eb6>] mount_mtd+0x222/0x2f0
 [<ffffffff814939d4>] ? jffs2_parse_options+0x594/0x594
 [<ffffffff81819c94>] ? mount_mtd_aux.isra.0+0x144/0x144
 [<ffffffff81258757>] ? free_pages+0x13/0x1c
 [<ffffffff814fa0ac>] ? selinux_sb_copy_data+0x278/0x2e0
 [<ffffffff81492b35>] jffs2_mount+0x41/0x60
 [<ffffffff81302fb7>] mount_fs+0x63/0x230
 [<ffffffff8133755f>] ? alloc_vfsmnt+0x32f/0x3b0
 [<ffffffff81337f2c>] vfs_kern_mount.part.6+0x6c/0x1f4
 [<ffffffff8133ceec>] do_mount+0xae8/0x1940
 [<ffffffff811b94e0>] ? audit_filter_rules.constprop.6+0x1d10/0x1d10
 [<ffffffff8133c404>] ? copy_mount_string+0x40/0x40
 [<ffffffff812cbf78>] ? alloc_pages_current+0xa4/0x1bc
 [<ffffffff81253a89>] ? __get_free_pages+0x25/0x50
 [<ffffffff81338993>] ? copy_mount_options.part.17+0x183/0x264
 [<ffffffff8133e3a9>] SyS_mount+0x105/0x1d0
 [<ffffffff8133e2a4>] ? copy_mnt_ns+0x560/0x560
 [<ffffffff810e8391>] ? msa_space_switch_handler+0x13d/0x190
 [<ffffffff81be184a>] entry_SYSCALL_64_fastpath+0x1e/0x97
 [<ffffffff810e9274>] ? msa_space_switch+0xb0/0xe0
Memory state around the buggy address:
 ffff8800842cf180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800842cf200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8800842cf280: fc fc fc fc fc fc 00 00 00 00 01 fc fc fc fc fc
                                                 ^
 ffff8800842cf300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8800842cf380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Cc: stable@vger.kernel.org
Reported-by: Kunkun Xu <xukunkun1@huawei.com>
Signed-off-by: lizhe <lizhe67@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoNFSv4: Don't discard segments marked for return in _pnfs_return_layout()
Trond Myklebust [Sun, 18 Apr 2021 19:00:45 +0000 (15:00 -0400)]
NFSv4: Don't discard segments marked for return in _pnfs_return_layout()

commit de144ff4234f935bd2150108019b5d87a90a8a96 upstream.

If the pNFS layout segment is marked with the NFS_LSEG_LAYOUTRETURN
flag, then the assumption is that it has some reporting requirement
to perform through a layoutreturn (e.g. flexfiles layout stats or error
information).

Fixes: 6d597e175012 ("pnfs: only tear down lsegs that precede seqid in LAYOUTRETURN args")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoNFS: Don't discard pNFS layout segments that are marked for return
Trond Myklebust [Thu, 15 Apr 2021 19:41:57 +0000 (15:41 -0400)]
NFS: Don't discard pNFS layout segments that are marked for return

commit 39fd01863616964f009599e50ca5c6ea9ebf88d6 upstream.

If the pNFS layout segment is marked with the NFS_LSEG_LAYOUTRETURN
flag, then the assumption is that it has some reporting requirement
to perform through a layoutreturn (e.g. flexfiles layout stats or error
information).

Fixes: e0b7d420f72a ("pNFS: Don't discard layout segments that are marked for return")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure
Marc Zyngier [Wed, 21 Apr 2021 16:43:16 +0000 (17:43 +0100)]
ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure

commit 1ecd5b129252249b9bc03d7645a7bda512747277 upstream.

When failing the driver probe because of invalid firmware properties,
the GTDT driver unmaps the interrupt that it mapped earlier.

However, it never checks whether the mapping of the interrupt actially
succeeded. Even more, should the firmware report an illegal interrupt
number that overlaps with the GIC SGI range, this can result in an
IPI being unmapped, and subsequent fireworks (as reported by Dann
Frazier).

Rework the driver to have a slightly saner behaviour and actually
check whether the interrupt has been mapped before unmapping things.

Reported-by: dann frazier <dann.frazier@canonical.com>
Fixes: ca9ae5ec4ef0 ("acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver")
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/YH87dtTfwYgavusz@xps13.dannf
Cc: <stable@vger.kernel.org>
Cc: Fu Wei <wefu@redhat.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: dann frazier <dann.frazier@canonical.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lore.kernel.org/r/20210421164317.1718831-2-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoopenvswitch: fix stack OOB read while fragmenting IPv4 packets
Davide Caratti [Wed, 28 Apr 2021 13:23:07 +0000 (15:23 +0200)]
openvswitch: fix stack OOB read while fragmenting IPv4 packets

commit 7c0ea5930c1c211931819d83cfb157bff1539a4c upstream.

running openvswitch on kernels built with KASAN, it's possible to see the
following splat while testing fragmentation of IPv4 packets:

 BUG: KASAN: stack-out-of-bounds in ip_do_fragment+0x1b03/0x1f60
 Read of size 1 at addr ffff888112fc713c by task handler2/1367

 CPU: 0 PID: 1367 Comm: handler2 Not tainted 5.12.0-rc6+ #418
 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014
 Call Trace:
  dump_stack+0x92/0xc1
  print_address_description.constprop.7+0x1a/0x150
  kasan_report.cold.13+0x7f/0x111
  ip_do_fragment+0x1b03/0x1f60
  ovs_fragment+0x5bf/0x840 [openvswitch]
  do_execute_actions+0x1bd5/0x2400 [openvswitch]
  ovs_execute_actions+0xc8/0x3d0 [openvswitch]
  ovs_packet_cmd_execute+0xa39/0x1150 [openvswitch]
  genl_family_rcv_msg_doit.isra.15+0x227/0x2d0
  genl_rcv_msg+0x287/0x490
  netlink_rcv_skb+0x120/0x380
  genl_rcv+0x24/0x40
  netlink_unicast+0x439/0x630
  netlink_sendmsg+0x719/0xbf0
  sock_sendmsg+0xe2/0x110
  ____sys_sendmsg+0x5ba/0x890
  ___sys_sendmsg+0xe9/0x160
  __sys_sendmsg+0xd3/0x170
  do_syscall_64+0x33/0x40
  entry_SYSCALL_64_after_hwframe+0x44/0xae
 RIP: 0033:0x7f957079db07
 Code: c3 66 90 41 54 41 89 d4 55 48 89 f5 53 89 fb 48 83 ec 10 e8 eb ec ff ff 44 89 e2 48 89 ee 89 df 41 89 c0 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 48 89 44 24 08 e8 24 ed ff ff 48
 RSP: 002b:00007f956ce35a50 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
 RAX: ffffffffffffffda RBX: 0000000000000019 RCX: 00007f957079db07
 RDX: 0000000000000000 RSI: 00007f956ce35ae0 RDI: 0000000000000019
 RBP: 00007f956ce35ae0 R08: 0000000000000000 R09: 00007f9558006730
 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
 R13: 00007f956ce37308 R14: 00007f956ce35f80 R15: 00007f956ce35ae0

 The buggy address belongs to the page:
 page:00000000af2a1d93 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112fc7
 flags: 0x17ffffc0000000()
 raw: 0017ffffc0000000 0000000000000000 dead000000000122 0000000000000000
 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
 page dumped because: kasan: bad access detected

 addr ffff888112fc713c is located in stack of task handler2/1367 at offset 180 in frame:
  ovs_fragment+0x0/0x840 [openvswitch]

 this frame has 2 objects:
  [32, 144) 'ovs_dst'
  [192, 424) 'ovs_rt'

 Memory state around the buggy address:
  ffff888112fc7000: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  ffff888112fc7080: 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00
 >ffff888112fc7100: 00 00 00 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00
                                         ^
  ffff888112fc7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  ffff888112fc7200: 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 00 00 00

for IPv4 packets, ovs_fragment() uses a temporary struct dst_entry. Then,
in the following call graph:

  ip_do_fragment()
    ip_skb_dst_mtu()
      ip_dst_mtu_maybe_forward()
        ip_mtu_locked()

the pointer to struct dst_entry is used as pointer to struct rtable: this
turns the access to struct members like rt_mtu_locked into an OOB read in
the stack. Fix this changing the temporary variable used for IPv4 packets
in ovs_fragment(), similarly to what is done for IPv6 few lines below.

Fixes: d52e5a7e7ca4 ("ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmt")
Cc: <stable@vger.kernel.org>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agomlxsw: spectrum_mr: Update egress RIF list before route's action
Ido Schimmel [Thu, 6 May 2021 07:23:08 +0000 (10:23 +0300)]
mlxsw: spectrum_mr: Update egress RIF list before route's action

commit cbaf3f6af9c268caf558c8e7ec52bcb35c5455dd upstream.

Each multicast route that is forwarding packets (as opposed to trapping
them) points to a list of egress router interfaces (RIFs) through which
packets are replicated.

A route's action can transition from trap to forward when a RIF is
created for one of the route's egress virtual interfaces (eVIF). When
this happens, the route's action is first updated and only later the
list of egress RIFs is committed to the device.

This results in the route pointing to an invalid list. In case the list
pointer is out of range (due to uninitialized memory), the device will
complain:

mlxsw_spectrum2 0000:06:00.0: EMAD reg access failed (tid=5733bf490000905c,reg_id=300f(pefa),type=write,status=7(bad parameter))

Fix this by first committing the list of egress RIFs to the device and
only later update the route's action.

Note that a fix is not needed in the reverse function (i.e.,
mlxsw_sp_mr_route_evif_unresolve()), as there the route's action is
first updated and only later the RIF is removed from the list.

Cc: stable@vger.kernel.org
Fixes: c011ec1bbfd6 ("mlxsw: spectrum: Add the multicast routing offloading logic")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/20210506072308.3834303-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agof2fs: fix to avoid out-of-bounds memory access
Chao Yu [Mon, 22 Mar 2021 11:47:30 +0000 (19:47 +0800)]
f2fs: fix to avoid out-of-bounds memory access

commit b862676e371715456c9dade7990c8004996d0d9e upstream.

butt3rflyh4ck <butterflyhuangxx@gmail.com> reported a bug found by
syzkaller fuzzer with custom modifications in 5.12.0-rc3+ [1]:

 dump_stack+0xfa/0x151 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x82/0x32c mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 f2fs_test_bit fs/f2fs/f2fs.h:2572 [inline]
 current_nat_addr fs/f2fs/node.h:213 [inline]
 get_next_nat_page fs/f2fs/node.c:123 [inline]
 __flush_nat_entry_set fs/f2fs/node.c:2888 [inline]
 f2fs_flush_nat_entries+0x258e/0x2960 fs/f2fs/node.c:2991
 f2fs_write_checkpoint+0x1372/0x6a70 fs/f2fs/checkpoint.c:1640
 f2fs_issue_checkpoint+0x149/0x410 fs/f2fs/checkpoint.c:1807
 f2fs_sync_fs+0x20f/0x420 fs/f2fs/super.c:1454
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem fs/sync.c:67 [inline]
 sync_filesystem+0x1b5/0x260 fs/sync.c:48
 generic_shutdown_super+0x70/0x370 fs/super.c:448
 kill_block_super+0x97/0xf0 fs/super.c:1394

The root cause is, if nat entry in checkpoint journal area is corrupted,
e.g. nid of journalled nat entry exceeds max nid value, during checkpoint,
once it tries to flush nat journal to NAT area, get_next_nat_page() may
access out-of-bounds memory on nat_bitmap due to it uses wrong nid value
as bitmap offset.

[1] https://lore.kernel.org/lkml/CAFcO6XOMWdr8pObek6eN6-fs58KG9doRFadgJj-FnF-1x43s2g@mail.gmail.com/T/#u

Reported-and-tested-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoubifs: Only check replay with inode type to judge if inode linked
Guochun Mao [Tue, 16 Mar 2021 08:52:14 +0000 (16:52 +0800)]
ubifs: Only check replay with inode type to judge if inode linked

commit 3e903315790baf4a966436e7f32e9c97864570ac upstream.

Conside the following case, it just write a big file into flash,
when complete writing, delete the file, and then power off promptly.
Next time power on, we'll get a replay list like:
...
LEB 1105:211344 len 4144 deletion 0 sqnum 428783 key type 1 inode 80
LEB 15:233544 len 160 deletion 1 sqnum 428785 key type 0 inode 80
LEB 1105:215488 len 4144 deletion 0 sqnum 428787 key type 1 inode 80
...
In the replay list, data nodes' deletion are 0, and the inode node's
deletion is 1. In current logic, the file's dentry will be removed,
but inode and the flash space it occupied will be reserved.
User will see that much free space been disappeared.

We only need to check the deletion value of the following inode type
node of the replay entry.

Fixes: e58725d51fa8 ("ubifs: Handle re-linking of inodes correctly while recovery")
Cc: stable@vger.kernel.org
Signed-off-by: Guochun Mao <guochun.mao@mediatek.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoarm64/vdso: Discard .note.gnu.property sections in vDSO
Bill Wendling [Fri, 23 Apr 2021 20:51:59 +0000 (13:51 -0700)]
arm64/vdso: Discard .note.gnu.property sections in vDSO

[ Upstream commit 388708028e6937f3fc5fc19aeeb847f8970f489c ]

The arm64 assembler in binutils 2.32 and above generates a program
property note in a note section, .note.gnu.property, to encode used x86
ISAs and features. But the kernel linker script only contains a single
NOTE segment:

  PHDRS
  {
    text    PT_LOAD    FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
    dynamic PT_DYNAMIC FLAGS(4);               /* PF_R */
    note    PT_NOTE    FLAGS(4);               /* PF_R */
  }

The NOTE segment generated by the vDSO linker script is aligned to 4 bytes.
But the .note.gnu.property section must be aligned to 8 bytes on arm64.

  $ readelf -n vdso64.so

  Displaying notes found in: .note
    Owner                Data size      Description
    Linux                0x00000004     Unknown note type: (0x00000000)
     description data: 06 00 00 00
  readelf: Warning: note with invalid namesz and/or descsz found at offset 0x20
  readelf: Warning:  type: 0x78, namesize: 0x00000100, descsize: 0x756e694c, alignment: 8

Since the note.gnu.property section in the vDSO is not checked by the
dynamic linker, discard the .note.gnu.property sections in the vDSO.

Similar to commit 4caffe6a28d31 ("x86/vdso: Discard .note.gnu.property
sections in vDSO"), but for arm64.

Signed-off-by: Bill Wendling <morbo@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210423205159.830854-1-morbo@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agobtrfs: fix race when picking most recent mod log operation for an old root
Filipe Manana [Tue, 20 Apr 2021 09:55:44 +0000 (10:55 +0100)]
btrfs: fix race when picking most recent mod log operation for an old root

[ Upstream commit f9690f426b2134cc3e74bfc5d9dfd6a4b2ca5281 ]

Commit dbcc7d57bffc0c ("btrfs: fix race when cloning extent buffer during
rewind of an old root"), fixed a race when we need to rewind the extent
buffer of an old root. It was caused by picking a new mod log operation
for the extent buffer while getting a cloned extent buffer with an outdated
number of items (off by -1), because we cloned the extent buffer without
locking it first.

However there is still another similar race, but in the opposite direction.
The cloned extent buffer has a number of items that does not match the
number of tree mod log operations that are going to be replayed. This is
because right after we got the last (most recent) tree mod log operation to
replay and before locking and cloning the extent buffer, another task adds
a new pointer to the extent buffer, which results in adding a new tree mod
log operation and incrementing the number of items in the extent buffer.
So after cloning we have mismatch between the number of items in the extent
buffer and the number of mod log operations we are going to apply to it.
This results in hitting a BUG_ON() that produces the following stack trace:

   ------------[ cut here ]------------
   kernel BUG at fs/btrfs/tree-mod-log.c:675!
   invalid opcode: 0000 [#1] SMP KASAN PTI
   CPU: 3 PID: 4811 Comm: crawl_1215 Tainted: G        W         5.12.0-7d1efdf501f8-misc-next+ #99
   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
   RIP: 0010:tree_mod_log_rewind+0x3b1/0x3c0
   Code: 05 48 8d 74 10 (...)
   RSP: 0018:ffffc90001027090 EFLAGS: 00010293
   RAX: 0000000000000000 RBX: ffff8880a8514600 RCX: ffffffffaa9e59b6
   RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8880a851462c
   RBP: ffffc900010270e0 R08: 00000000000000c0 R09: ffffed1004333417
   R10: ffff88802199a0b7 R11: ffffed1004333416 R12: 000000000000000e
   R13: ffff888135af8748 R14: ffff88818766ff00 R15: ffff8880a851462c
   FS:  00007f29acf62700(0000) GS:ffff8881f2200000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: 00007f0e6013f718 CR3: 000000010d42e003 CR4: 0000000000170ee0
   Call Trace:
    btrfs_get_old_root+0x16a/0x5c0
    ? lock_downgrade+0x400/0x400
    btrfs_search_old_slot+0x192/0x520
    ? btrfs_search_slot+0x1090/0x1090
    ? free_extent_buffer.part.61+0xd7/0x140
    ? free_extent_buffer+0x13/0x20
    resolve_indirect_refs+0x3e9/0xfc0
    ? lock_downgrade+0x400/0x400
    ? __kasan_check_read+0x11/0x20
    ? add_prelim_ref.part.11+0x150/0x150
    ? lock_downgrade+0x400/0x400
    ? __kasan_check_read+0x11/0x20
    ? lock_acquired+0xbb/0x620
    ? __kasan_check_write+0x14/0x20
    ? do_raw_spin_unlock+0xa8/0x140
    ? rb_insert_color+0x340/0x360
    ? prelim_ref_insert+0x12d/0x430
    find_parent_nodes+0x5c3/0x1830
    ? stack_trace_save+0x87/0xb0
    ? resolve_indirect_refs+0xfc0/0xfc0
    ? fs_reclaim_acquire+0x67/0xf0
    ? __kasan_check_read+0x11/0x20
    ? lockdep_hardirqs_on_prepare+0x210/0x210
    ? fs_reclaim_acquire+0x67/0xf0
    ? __kasan_check_read+0x11/0x20
    ? ___might_sleep+0x10f/0x1e0
    ? __kasan_kmalloc+0x9d/0xd0
    ? trace_hardirqs_on+0x55/0x120
    btrfs_find_all_roots_safe+0x142/0x1e0
    ? find_parent_nodes+0x1830/0x1830
    ? trace_hardirqs_on+0x55/0x120
    ? ulist_free+0x1f/0x30
    ? btrfs_inode_flags_to_xflags+0x50/0x50
    iterate_extent_inodes+0x20e/0x580
    ? tree_backref_for_extent+0x230/0x230
    ? release_extent_buffer+0x225/0x280
    ? read_extent_buffer+0xdd/0x110
    ? lock_downgrade+0x400/0x400
    ? __kasan_check_read+0x11/0x20
    ? lock_acquired+0xbb/0x620
    ? __kasan_check_write+0x14/0x20
    ? do_raw_spin_unlock+0xa8/0x140
    ? _raw_spin_unlock+0x22/0x30
    ? release_extent_buffer+0x225/0x280
    iterate_inodes_from_logical+0x129/0x170
    ? iterate_inodes_from_logical+0x129/0x170
    ? btrfs_inode_flags_to_xflags+0x50/0x50
    ? iterate_extent_inodes+0x580/0x580
    ? __vmalloc_node+0x92/0xb0
    ? init_data_container+0x34/0xb0
    ? init_data_container+0x34/0xb0
    ? kvmalloc_node+0x60/0x80
    btrfs_ioctl_logical_to_ino+0x158/0x230
    btrfs_ioctl+0x2038/0x4360
    ? __kasan_check_write+0x14/0x20
    ? mmput+0x3b/0x220
    ? btrfs_ioctl_get_supported_features+0x30/0x30
    ? __kasan_check_read+0x11/0x20
    ? __kasan_check_read+0x11/0x20
    ? lock_release+0xc8/0x650
    ? __might_fault+0x64/0xd0
    ? __kasan_check_read+0x11/0x20
    ? lock_downgrade+0x400/0x400
    ? lockdep_hardirqs_on_prepare+0x210/0x210
    ? lockdep_hardirqs_on_prepare+0x13/0x210
    ? _raw_spin_unlock_irqrestore+0x51/0x63
    ? __kasan_check_read+0x11/0x20
    ? do_vfs_ioctl+0xfc/0x9d0
    ? ioctl_file_clone+0xe0/0xe0
    ? lock_downgrade+0x400/0x400
    ? lockdep_hardirqs_on_prepare+0x210/0x210
    ? __kasan_check_read+0x11/0x20
    ? lock_release+0xc8/0x650
    ? __task_pid_nr_ns+0xd3/0x250
    ? __kasan_check_read+0x11/0x20
    ? __fget_files+0x160/0x230
    ? __fget_light+0xf2/0x110
    __x64_sys_ioctl+0xc3/0x100
    do_syscall_64+0x37/0x80
    entry_SYSCALL_64_after_hwframe+0x44/0xae
   RIP: 0033:0x7f29ae85b427
   Code: 00 00 90 48 8b (...)
   RSP: 002b:00007f29acf5fcf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
   RAX: ffffffffffffffda RBX: 00007f29acf5ff40 RCX: 00007f29ae85b427
   RDX: 00007f29acf5ff48 RSI: 00000000c038943b RDI: 0000000000000003
   RBP: 0000000001000000 R08: 0000000000000000 R09: 00007f29acf60120
   R10: 00005640d5fc7b00 R11: 0000000000000246 R12: 0000000000000003
   R13: 00007f29acf5ff48 R14: 00007f29acf5ff40 R15: 00007f29acf5fef8
   Modules linked in:
   ---[ end trace 85e5fce078dfbe04 ]---

  (gdb) l *(tree_mod_log_rewind+0x3b1)
  0xffffffff819e5b21 is in tree_mod_log_rewind (fs/btrfs/tree-mod-log.c:675).
  670                      * the modification. As we're going backwards, we do the
  671                      * opposite of each operation here.
  672                      */
  673                     switch (tm->op) {
  674                     case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING:
  675                             BUG_ON(tm->slot < n);
  676                             fallthrough;
  677                     case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING:
  678                     case BTRFS_MOD_LOG_KEY_REMOVE:
  679                             btrfs_set_node_key(eb, &tm->key, tm->slot);
  (gdb) quit

The following steps explain in more detail how it happens:

1) We have one tree mod log user (through fiemap or the logical ino ioctl),
   with a sequence number of 1, so we have fs_info->tree_mod_seq == 1.
   This is task A;

2) Another task is at ctree.c:balance_level() and we have eb X currently as
   the root of the tree, and we promote its single child, eb Y, as the new
   root.

   Then, at ctree.c:balance_level(), we call:

      ret = btrfs_tree_mod_log_insert_root(root->node, child, true);

3) At btrfs_tree_mod_log_insert_root() we create a tree mod log operation
   of type BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING, with a ->logical field
   pointing to ebX->start. We only have one item in eb X, so we create
   only one tree mod log operation, and store in the "tm_list" array;

4) Then, still at btrfs_tree_mod_log_insert_root(), we create a tree mod
   log element of operation type BTRFS_MOD_LOG_ROOT_REPLACE, ->logical set
   to ebY->start, ->old_root.logical set to ebX->start, ->old_root.level
   set to the level of eb X and ->generation set to the generation of eb X;

5) Then btrfs_tree_mod_log_insert_root() calls tree_mod_log_free_eb() with
   "tm_list" as argument. After that, tree_mod_log_free_eb() calls
   tree_mod_log_insert(). This inserts the mod log operation of type
   BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING from step 3 into the rbtree
   with a sequence number of 2 (and fs_info->tree_mod_seq set to 2);

6) Then, after inserting the "tm_list" single element into the tree mod
   log rbtree, the BTRFS_MOD_LOG_ROOT_REPLACE element is inserted, which
   gets the sequence number 3 (and fs_info->tree_mod_seq set to 3);

7) Back to ctree.c:balance_level(), we free eb X by calling
   btrfs_free_tree_block() on it. Because eb X was created in the current
   transaction, has no other references and writeback did not happen for
   it, we add it back to the free space cache/tree;

8) Later some other task B allocates the metadata extent from eb X, since
   it is marked as free space in the space cache/tree, and uses it as a
   node for some other btree;

9) The tree mod log user task calls btrfs_search_old_slot(), which calls
   btrfs_get_old_root(), and finally that calls tree_mod_log_oldest_root()
   with time_seq == 1 and eb_root == eb Y;

10) The first iteration of the while loop finds the tree mod log element
    with sequence number 3, for the logical address of eb Y and of type
    BTRFS_MOD_LOG_ROOT_REPLACE;

11) Because the operation type is BTRFS_MOD_LOG_ROOT_REPLACE, we don't
    break out of the loop, and set root_logical to point to
    tm->old_root.logical, which corresponds to the logical address of
    eb X;

12) On the next iteration of the while loop, the call to
    tree_mod_log_search_oldest() returns the smallest tree mod log element
    for the logical address of eb X, which has a sequence number of 2, an
    operation type of BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING and
    corresponds to the old slot 0 of eb X (eb X had only 1 item in it
    before being freed at step 7);

13) We then break out of the while loop and return the tree mod log
    operation of type BTRFS_MOD_LOG_ROOT_REPLACE (eb Y), and not the one
    for slot 0 of eb X, to btrfs_get_old_root();

14) At btrfs_get_old_root(), we process the BTRFS_MOD_LOG_ROOT_REPLACE
    operation and set "logical" to the logical address of eb X, which was
    the old root. We then call tree_mod_log_search() passing it the logical
    address of eb X and time_seq == 1;

15) But before calling tree_mod_log_search(), task B locks eb X, adds a
    key to eb X, which results in adding a tree mod log operation of type
    BTRFS_MOD_LOG_KEY_ADD, with a sequence number of 4, to the tree mod
    log, and increments the number of items in eb X from 0 to 1.
    Now fs_info->tree_mod_seq has a value of 4;

16) Task A then calls tree_mod_log_search(), which returns the most recent
    tree mod log operation for eb X, which is the one just added by task B
    at the previous step, with a sequence number of 4, a type of
    BTRFS_MOD_LOG_KEY_ADD and for slot 0;

17) Before task A locks and clones eb X, task A adds another key to eb X,
    which results in adding a new BTRFS_MOD_LOG_KEY_ADD mod log operation,
    with a sequence number of 5, for slot 1 of eb X, increments the
    number of items in eb X from 1 to 2, and unlocks eb X.
    Now fs_info->tree_mod_seq has a value of 5;

18) Task A then locks eb X and clones it. The clone has a value of 2 for
    the number of items and the pointer "tm" points to the tree mod log
    operation with sequence number 4, not the most recent one with a
    sequence number of 5, so there is mismatch between the number of
    mod log operations that are going to be applied to the cloned version
    of eb X and the number of items in the clone;

19) Task A then calls tree_mod_log_rewind() with the clone of eb X, the
    tree mod log operation with sequence number 4 and a type of
    BTRFS_MOD_LOG_KEY_ADD, and time_seq == 1;

20) At tree_mod_log_rewind(), we set the local variable "n" with a value
    of 2, which is the number of items in the clone of eb X.

    Then in the first iteration of the while loop, we process the mod log
    operation with sequence number 4, which is targeted at slot 0 and has
    a type of BTRFS_MOD_LOG_KEY_ADD. This results in decrementing "n" from
    2 to 1.

    Then we pick the next tree mod log operation for eb X, which is the
    tree mod log operation with a sequence number of 2, a type of
    BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING and for slot 0, it is the one
    added in step 5 to the tree mod log tree.

    We go back to the top of the loop to process this mod log operation,
    and because its slot is 0 and "n" has a value of 1, we hit the BUG_ON:

        (...)
        switch (tm->op) {
        case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING:
                BUG_ON(tm->slot < n);
                fallthrough;
(...)

Fix this by checking for a more recent tree mod log operation after locking
and cloning the extent buffer of the old root node, and use it as the first
operation to apply to the cloned extent buffer when rewinding it.

Stable backport notes: due to moved code and renames, in =< 5.11 the
change should be applied to ctree.c:get_old_root.

Reported-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Link: https://lore.kernel.org/linux-btrfs/20210404040732.GZ32440@hungrycats.org/
Fixes: 834328a8493079 ("Btrfs: tree mod log's old roots could still be part of the tree")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
3 years agoALSA: hda/realtek: Add quirk for Intel Clevo PCx0Dx
Eckhart Mohr [Tue, 27 Apr 2021 15:30:25 +0000 (17:30 +0200)]
ALSA: hda/realtek: Add quirk for Intel Clevo PCx0Dx

commit 970e3012c04c96351c413f193a9c909e6d871ce2 upstream.

This applies a SND_PCI_QUIRK(...) to the Clevo PCx0Dx barebones. This
fix enables audio output over the headset jack and ensures that a
microphone connected via the headset combo jack is correctly recognized
when pluged in.

[ Rearranged the list entries in a sorted order -- tiwai ]

Signed-off-by: Eckhart Mohr <e.mohr@tuxedocomputers.com>
Co-developed-by: Werner Sembach <wse@tuxedocomputers.com>
Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210427153025.451118-1-wse@tuxedocomputers.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: usb-audio: Add dB range mapping for Sennheiser Communications Headset PC 8
Timo Gurr [Mon, 3 May 2021 11:08:22 +0000 (13:08 +0200)]
ALSA: usb-audio: Add dB range mapping for Sennheiser Communications Headset PC 8

commit ab2165e2e6ed17345ffa8ee88ca764e8788ebcd7 upstream.

The decibel volume range contains a negative maximum value resulting in
pipewire complaining about the device and effectivly having no sound
output. The wrong values also resulted in the headset sounding muted
already at a mixer level of about ~25%.

BugLink: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/1049
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=212897
Signed-off-by: Timo Gurr <timo.gurr@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503110822.10222-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: usb-audio: More constifications
Takashi Iwai [Sun, 5 Jan 2020 14:47:26 +0000 (15:47 +0100)]
ALSA: usb-audio: More constifications

commit a01df925d1bbc97d6f7fe07b157aadb565315337 upstream.

Apply const prefix to the remaining places: the static table for the
unit information, the mixer maps, the validator tables, etc.

Just for minor optimization and no functional changes.

Link: https://lore.kernel.org/r/20200105144823.29547-12-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: usb-audio: Explicitly set up the clock selector
Takashi Iwai [Tue, 13 Apr 2021 08:41:52 +0000 (10:41 +0200)]
ALSA: usb-audio: Explicitly set up the clock selector

commit d2e8f641257d0d3af6e45d6ac2d6f9d56b8ea964 upstream.

In the current code, we have some assumption that the audio clock
selector has been set up implicitly and don't want to touch it unless
it's really needed for the fallback autoclock setup.  This works for
most devices but some seem having a problem.  Partially this was
covered for the devices with a single connector at the initialization
phase (commit 086b957cc17f "ALSA: usb-audio: Skip the clock selector
inquiry for single connections"), but also there are cases where the
wrong clock set up is kept silently.  The latter seems to be the cause
of the noises on Behringer devices.

In this patch, we explicitly set up the audio clock selector whenever
the appropriate node is found.

Reported-by: Geraldo Nascimento <geraldogabriel@gmail.com>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199327
Link: https://lore.kernel.org/r/CAEsQvcvF7LnO8PxyyCxuRCx=7jNeSCvFAd-+dE0g_rd1rOxxdw@mail.gmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210413084152.32325-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: sb: Fix two use after free in snd_sb_qsound_build
Lv Yunlong [Mon, 26 Apr 2021 14:55:41 +0000 (07:55 -0700)]
ALSA: sb: Fix two use after free in snd_sb_qsound_build

commit 4fb44dd2c1dda18606348acdfdb97e8759dde9df upstream.

In snd_sb_qsound_build, snd_ctl_add(..,p->qsound_switch...) and
snd_ctl_add(..,p->qsound_space..) are called. But the second
arguments of snd_ctl_add() could be freed via snd_ctl_add_replace()
->snd_ctl_free_one(). After the error code is returned,
snd_sb_qsound_destroy(p) is called in __error branch.

But in snd_sb_qsound_destroy(), the freed p->qsound_switch and
p->qsound_space are still used by snd_ctl_remove().

My patch set p->qsound_switch and p->qsound_space to NULL if
snd_ctl_add() failed to avoid the uaf bugs. But these codes need
to further be improved with the code style.

Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210426145541.8070-1-lyl2019@mail.ustc.edu.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: hda/conexant: Re-order CX5066 quirk table entries
Takashi Iwai [Wed, 28 Apr 2021 11:27:04 +0000 (13:27 +0200)]
ALSA: hda/conexant: Re-order CX5066 quirk table entries

commit 2e6a731296be9d356fdccee9fb6ae345dad96438 upstream.

Just re-order the cx5066_fixups[] entries for HP devices for avoiding
the oversight of the duplicated or unapplied item in future.
No functional changes.

Also Cc-to-stable for the further patch applications.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210428112704.23967-14-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoALSA: emu8000: Fix a use after free in snd_emu8000_create_mixer
Lv Yunlong [Mon, 26 Apr 2021 13:11:29 +0000 (06:11 -0700)]
ALSA: emu8000: Fix a use after free in snd_emu8000_create_mixer

commit 1c98f574403dbcf2eb832d5535a10d967333ef2d upstream.

Our code analyzer reported a uaf.

In snd_emu8000_create_mixer, the callee snd_ctl_add(..,emu->controls[i])
calls snd_ctl_add_replace(.., kcontrol,..). Inside snd_ctl_add_replace(),
if error happens, kcontrol will be freed by snd_ctl_free_one(kcontrol).
Then emu->controls[i] points to a freed memory, and the execution comes
to __error branch of snd_emu8000_create_mixer. The freed emu->controls[i]
is used in snd_ctl_remove(card, emu->controls[i]).

My patch set emu->controls[i] to NULL if snd_ctl_add() failed to avoid
the uaf.

Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210426131129.4796-1-lyl2019@mail.ustc.edu.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>