OSDN Git Service
Dmitry Shmidt [Fri, 12 Aug 2016 21:20:42 +0000 (14:20 -0700)]
Merge remote-tracking branch 'common/android-4.4' into android-4.4.y
Badhri Jagan Sridharan [Tue, 9 Aug 2016 19:47:37 +0000 (12:47 -0700)]
ANDROID: dm-verity: adopt changes made to dm callbacks
v4.4 introduced changes to the callbacks used for
dm-linear and dm-verity-target targets. Move to those headers
in dm-android-verity.
Verified on hikey while having
BOARD_USES_RECOVERY_AS_BOOT := true
BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
BUG:
27339727
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: Ic64950c3b55f0a6eaa570bcedc2ace83bbf3005e
Al Viro [Wed, 4 May 2016 18:04:13 +0000 (14:04 -0400)]
UPSTREAM: ecryptfs: fix handling of directory opening
(cherry picked from commit
6a480a7842545ec520a91730209ec0bae41694c1)
First of all, trying to open them r/w is idiocy; it's guaranteed to fail.
Moreover, assigning ->f_pos and assuming that everything will work is
blatantly broken - try that with e.g. tmpfs as underlying layer and watch
the fireworks. There may be a non-trivial amount of state associated with
current IO position, well beyond the numeric offset. Using the single
struct file associated with underlying inode is really not a good idea;
we ought to open one for each ecryptfs directory struct file.
Additionally, file_operations both for directories and non-directories are
full of pointless methods; non-directories should *not* have ->iterate(),
directories should not have ->flush(), ->fasync() and ->splice_read().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Change-Id: I4813ce803f270fdd364758ce1dc108b76eab226e
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Jeff Mahoney [Tue, 5 Jul 2016 21:32:30 +0000 (17:32 -0400)]
UPSTREAM: ecryptfs: don't allow mmap when the lower fs doesn't support it
(cherry picked from commit
f0fe970df3838c202ef6c07a4c2b36838ef0a88b)
There are legitimate reasons to disallow mmap on certain files, notably
in sysfs or procfs. We shouldn't emulate mmap support on file systems
that don't offer support natively.
CVE-2016-1583
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Cc: stable@vger.kernel.org
[tyhicks: clean up f_op check by using ecryptfs_file_to_lower()]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Change-Id: I66e3670771630a25b0608f10019d1584e9ce73a6
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Jeff Mahoney [Tue, 5 Jul 2016 21:32:29 +0000 (17:32 -0400)]
UPSTREAM: Revert "ecryptfs: forbid opening files without mmap handler"
(cherry picked from commit
78c4e172412de5d0456dc00d2b34050aa0b683b5)
This reverts upstream commit
2f36db71009304b3f0b95afacd8eba1f9f046b87.
It fixed a local root exploit but also introduced a dependency on
the lower file system implementing an mmap operation just to open a file,
which is a bit of a heavy hammer. The right fix is to have mmap depend
on the existence of the mmap handler instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Fixes: Change-Id I0be77c7f8bd3046bc34cd87ef577529792d479bc
("UPSTREAM: ecryptfs: forbid opening files without mmap handler")
Change-Id: Ib9bc87099f7f89e4e12dbc1a79e884dcadb1befb
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Amit Pundir [Thu, 11 Aug 2016 13:43:22 +0000 (19:13 +0530)]
ANDROID: net: core: fix UID-based routing
Fix RTA_UID enum to match it with the Android userspace code which
assumes RTA_UID=18.
With this patch all Android kernel networking unit tests mentioned here
https://source.android.com/devices/tech/config/kernel_network_tests.html
are success.
Without this patch multinetwork_test.py unit test fails.
Change-Id: I3ff36670f7d4e5bf5f01dce584ae9d53deabb3ed
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Amit Pundir [Fri, 12 Aug 2016 05:54:50 +0000 (11:24 +0530)]
ANDROID: net: fib: remove duplicate assignment
Remove duplicate FRA_GOTO assignment.
Fixes:
fd2cf795f3ab ("net: core: Support UID-based routing.")
Change-Id: I462c24b16fdef42ae2332571a0b95de3ef9d2e25
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
John Stultz [Mon, 1 Aug 2016 23:49:07 +0000 (16:49 -0700)]
FROMLIST: proc: Fix timerslack_ns CAP_SYS_NICE check when adjusting self
In changing from checking ptrace_may_access(p, PTRACE_MODE_ATTACH_FSCREDS)
to capable(CAP_SYS_NICE), I missed that ptrace_my_access succeeds
when p == current, but the CAP_SYS_NICE doesn't.
Thus while the previous commit was intended to loosen the needed
privledges to modify a processes timerslack, it needlessly restricted
a task modifying its own timerslack via the proc/<tid>/timerslack_ns
(which is permitted also via the PR_SET_TIMERSLACK method).
This patch corrects this by checking if p == current before checking
the CAP_SYS_NICE value.
Cc: Kees Cook <keescook@chromium.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
CC: Arjan van de Ven <arjan@linux.intel.com>
Cc: Oren Laadan <orenl@cellrox.com>
Cc: Ruchi Kandoi <kandoiruchi@google.com>
Cc: Rom Lemarchand <romlem@android.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Colin Cross <ccross@android.com>
Cc: Nick Kralevich <nnk@google.com>
Cc: Dmitry Shmidt <dimitrysh@google.com>
Cc: Elliott Hughes <enh@google.com>
Cc: Android Kernel Team <kernel-team@android.com>
Mailing-list-url: http://www.spinics.net/lists/kernel/msg2317488.html
Change-Id: Ia3e8aff07c2d41f55b6617502d33c39b7d781aac
Signed-off-by: John Stultz <john.stultz@linaro.org>
Dmitry Shmidt [Thu, 11 Aug 2016 22:12:05 +0000 (15:12 -0700)]
Merge tag 'v4.4.17' into android-4.4.y
This is the 4.4.17 stable release
Jeremy Compostella [Tue, 10 May 2016 11:10:20 +0000 (13:10 +0200)]
ANDROID: dm verity fec: pack the fec_header structure
The fec_header structure is generated build time and stored on disk.
The fec_header might be build on a 64 bits machine while it is read
per a 32 bits device or the other way around. In such situations, the
fec_header fields are not aligned as expected by the device and it
fails to read the fec_header structure.
This patch makes the fec_header packed.
Change-Id: Idb84453e70cc11abd5ef3a0adfbb16f8b5feaf06
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Badhri Jagan Sridharan [Thu, 7 Jul 2016 00:16:19 +0000 (17:16 -0700)]
ANDROID: dm: android-verity: Verify header before fetching table
Move header validation logic before reading the verity_table as
an invalid header implies the table is invalid as well.
(Cherry-picked from:
https://partner-android-review.git.corp.google.com/#/c/625203)
BUG:
29940612
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: Ib34d25c0854202f3e70df0a6d0ef1d96f0250c8e
Badhri Jagan Sridharan [Mon, 27 Jun 2016 23:25:55 +0000 (16:25 -0700)]
ANDROID: dm: allow adb disable-verity only in userdebug
adb disable-verity was allowed when the phone is in the
unlocked state. Since the driver is now aware of the build
variant, honor "adb disable-verity" only in userdebug
builds.
(Cherry-picked from
https://partner-android-review.git.corp.google.com/#/c/622117)
BUG:
29276559
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I7ce9f38d8c7a62361392c5a8ccebb288f8a3a2ea
Badhri Jagan Sridharan [Sat, 18 Jun 2016 01:54:35 +0000 (18:54 -0700)]
ANDROID: dm: mount as linear target if eng build
eng builds dont have verity enabled i.e it does even
have verity metadata appended to the parition. Therefore
add rootdev as linear device and map the entire partition
if build variant is "eng".
(Cherry-picked based on
https://partner-android-review.git.corp.google.com/#/c/618690/)
BUG:
29276559
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I8f5c2289b842b820ca04f5773525e5449bb3f355
Badhri Jagan Sridharan [Fri, 20 May 2016 23:45:45 +0000 (16:45 -0700)]
ANDROID: dm: use default verity public key
If the dm-android-verity target does not provide a default
key try using the default public key from the system keyring.
The defualt verity keyid is passed as a kernel command line
argument veritykeyid=.
The order of the dm-android-verity params have been reversed
to facilitate the change.
Old format example:
dm="system none ro,0 1 android-verity Android:#
7e4333f9bba00adfe0ede979e28ed1920492b40f /dev/mmcblk0p43"
New formats supported:
dm="system none ro,0 1 android-verity /dev/mmcblk0p43 Android:#
7e4333f9bba00adfe0ede979e28ed1920492b40f"
(or)
dm="system none ro,0 1 android-verity /dev/mmcblk0p43"
when veritykeyid= is set in the kernel command line.
BUG:
28384658
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I506c89b053d835ab579e703eef2bc1f8487250de
(cherry picked from commit
c5c74d0327729f35b576564976885596c6d0e7fb)
Badhri Jagan Sridharan [Fri, 20 May 2016 23:44:19 +0000 (16:44 -0700)]
ANDROID: dm: fix signature verification flag
The bug was that the signature verification was only
happening when verity was disabled. It should always
happen when verity is enabled.
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I2d9354e240d36ea06fc68c2d18d8e87b823a4c2f
(cherry picked from commit
5364b5ca0b1a12a58283b51408e43fc36d4e4fe7)
Jeremy Compostella [Fri, 15 Apr 2016 11:32:54 +0000 (13:32 +0200)]
ANDROID: dm: use name_to_dev_t
This patch makes android_verity_ctr() parse its block device string
parameter with name_to_dev_t(). It allows the use of less hardware
related block device reference like PARTUUID for instance.
Change-Id: Idb84453e70cc11abd5ef3a0adfbb16f8b5feaf07
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Badhri Jagan Sridharan [Tue, 5 Apr 2016 18:18:16 +0000 (11:18 -0700)]
ANDROID: dm: rename dm-linear methods for dm-android-verity
This keeps linear_target as static variable and just exposes
the linear target methods for android-verity
Cherry-picked: https://android-review.googlesource.com/#/c/212858
Change-Id: I4a377e417b00afd9ecccdb3e605fea31a7df112e
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
(cherry picked from commit
a6d1b091f40b25d97849487e29ec097bc5f568dd)
Badhri Jagan Sridharan [Mon, 28 Mar 2016 21:41:21 +0000 (14:41 -0700)]
ANDROID: dm: Minor cleanup
Compacts the linear device arguments removing the
unnecessary variables.
Bug:
27175947
Change-Id: I157170eebe3c0f89a68ae05870a1060f188d0da0
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Badhri Jagan Sridharan [Mon, 21 Mar 2016 17:55:23 +0000 (10:55 -0700)]
ANDROID: dm: Mounting root as linear device when verity disabled
This CL makes android-verity target to be added as linear
dm device if when bootloader is unlocked and verity is disabled.
Bug:
27175947
Change-Id: Ic41ca4b8908fb2777263799cf3a3e25934d70f18
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Badhri Jagan Sridharan [Tue, 9 Feb 2016 00:28:43 +0000 (16:28 -0800)]
ANDROID: dm-android-verity: Rebase on top of 4.1
Following CLs in upstream causes minor changes to dm-android-verity target.
1. keys: change asymmetric keys to use common hash definitions
2. block: Abstract out bvec iterator
Rebase dm-android-verity on top of these changes.
Bug:
27175947
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: Icfdc3e7b3ead5de335a059cade1aca70414db415
Badhri Jagan Sridharan [Tue, 15 Dec 2015 04:09:39 +0000 (20:09 -0800)]
ANDROID: dm: Add android verity target
This device-mapper target is virtually a VERITY target. This
target is setup by reading the metadata contents piggybacked
to the actual data blocks in the block device. The signature
of the metadata contents are verified against the key included
in the system keyring. Upon success, the underlying verity
target is setup.
BUG:
27175947
Change-Id: I7e99644a0960ac8279f02c0158ed20999510ea97
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Jeremy Compostella [Mon, 2 May 2016 15:29:28 +0000 (17:29 +0200)]
ANDROID: dm: fix dm_substitute_devices()
When candidate is the last parameter, candidate_end points to the '\0'
character and not the DM_FIELD_SEP character. In such a situation, we
should not move the candidate_end pointer one character backward.
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Badhri Jagan Sridharan [Tue, 9 Feb 2016 00:47:41 +0000 (16:47 -0800)]
ANDROID: dm: Rebase on top of 4.1
1. "dm: optimize use SRCU and RCU" removes the use of dm_table_put.
2. "dm: remove request-based logic from make_request_fn wrapper" necessitates
calling dm_setup_md_queue or else the request_queue's make_request_fn
pointer ends being unset.
[ 7.711600] Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
[ 7.717519] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W
4.1.15-02273-gb057d16-dirty #33
[ 7.726559] Hardware name: HiKey Development Board (DT)
[ 7.731779] task:
ffffffc005f8acc0 ti:
ffffffc005f8c000 task.ti:
ffffffc005f8c000
[ 7.739257] PC is at 0x0
[ 7.741787] LR is at generic_make_request+0x8c/0x108
....
[ 9.082931] Call trace:
[ 9.085372] [< (null)>] (null)
[ 9.090074] [<
ffffffc0003f4ac0>] submit_bio+0x98/0x1e0
[ 9.095212] [<
ffffffc0001e2618>] _submit_bh+0x120/0x1f0
[ 9.096165] cfg80211: Calling CRDA to update world regulatory domain
[ 9.106781] [<
ffffffc0001e5450>] __bread_gfp+0x94/0x114
[ 9.112004] [<
ffffffc00024a748>] ext4_fill_super+0x18c/0x2d64
[ 9.117750] [<
ffffffc0001b275c>] mount_bdev+0x194/0x1c0
[ 9.122973] [<
ffffffc0002450dc>] ext4_mount+0x14/0x1c
[ 9.128021] [<
ffffffc0001b29a0>] mount_fs+0x3c/0x194
[ 9.132985] [<
ffffffc0001d059c>] vfs_kern_mount+0x4c/0x134
[ 9.138467] [<
ffffffc0001d2168>] do_mount+0x204/0xbbc
[ 9.143514] [<
ffffffc0001d2ec4>] SyS_mount+0x94/0xe8
[ 9.148479] [<
ffffffc000c54074>] mount_block_root+0x120/0x24c
[ 9.154222] [<
ffffffc000c543e8>] mount_root+0x110/0x12c
[ 9.159443] [<
ffffffc000c54574>] prepare_namespace+0x170/0x1b8
[ 9.165273] [<
ffffffc000c53d98>] kernel_init_freeable+0x23c/0x260
[ 9.171365] [<
ffffffc0009b1748>] kernel_init+0x10/0x118
[ 9.176589] Code: bad PC value
[ 9.179807] ---[ end trace
75e1bc52ba364d13 ]---
Bug:
27175947
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I952d86fd1475f0825f9be1386e3497b36127abd0
Will Drewry [Wed, 9 Jun 2010 22:47:38 +0000 (17:47 -0500)]
CHROMIUM: dm: boot time specification of dm=
This is a wrap-up of three patches pending upstream approval.
I'm bundling them because they are interdependent, and it'll be
easier to drop it on rebase later.
1. dm: allow a dm-fs-style device to be shared via dm-ioctl
Integrates feedback from Alisdair, Mike, and Kiyoshi.
Two main changes occur here:
- One function is added which allows for a programmatically created
mapped device to be inserted into the dm-ioctl hash table. This binds
the device to a name and, optional, uuid which is needed by udev and
allows for userspace management of the mapped device.
- dm_table_complete() was extended to handle all of the final
functional changes required for the table to be operational once
called.
2. init: boot to device-mapper targets without an initr*
Add a dm= kernel parameter modeled after the md= parameter from
do_mounts_md. It allows for device-mapper targets to be configured at
boot time for use early in the boot process (as the root device or
otherwise). It also replaces /dev/XXX calls with major:minor opportunistically.
The format is dm="name uuid ro,table line 1,table line 2,...". The
parser expects the comma to be safe to use as a newline substitute but,
otherwise, uses the normal separator of space. Some attempt has been
made to make it forgiving of additional spaces (using skip_spaces()).
A mapped device created during boot will be assigned a minor of 0 and
may be access via /dev/dm-0.
An example dm-linear root with no uuid may look like:
root=/dev/dm-0 dm="lroot none ro, 0 4096 linear /dev/ubdb 0, 4096 4096 linear /dv/ubdc 0"
Once udev is started, /dev/dm-0 will become /dev/mapper/lroot.
Older upstream threads:
http://marc.info/?l=dm-devel&m=
127429492521964&w=2
http://marc.info/?l=dm-devel&m=
127429499422096&w=2
http://marc.info/?l=dm-devel&m=
127429493922000&w=2
Latest upstream threads:
https://patchwork.kernel.org/patch/104859/
https://patchwork.kernel.org/patch/104860/
https://patchwork.kernel.org/patch/104861/
Bug:
27175947
Signed-off-by: Will Drewry <wad@chromium.org>
Review URL: http://codereview.chromium.org/
2020011
Change-Id: I92bd53432a11241228d2e5ac89a3b20d19b05a31
Greg Kroah-Hartman [Wed, 10 Aug 2016 09:49:43 +0000 (11:49 +0200)]
Linux 4.4.17
Miklos Szeredi [Wed, 3 Aug 2016 11:44:27 +0000 (13:44 +0200)]
vfs: fix deadlock in file_remove_privs() on overlayfs
commit
c1892c37769cf89c7e7ba57528ae2ccb5d153c9b upstream.
file_remove_privs() is called with inode lock on file_inode(), which
proceeds to calling notify_change() on file->f_path.dentry. Which triggers
the WARN_ON_ONCE(!inode_is_locked(inode)) in addition to deadlocking later
when ovl_setattr tries to lock the underlying inode again.
Fix this mess by not mixing the layers, but doing everything on underlying
dentry/inode.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes:
07a2daab49c5 ("ovl: Copy up underlying inode's ->i_mode to overlay inode")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Shishkin [Thu, 30 Jun 2016 08:51:44 +0000 (11:51 +0300)]
intel_th: Fix a deadlock in modprobing
commit
a36aa80f3cb2540fb1dbad6240852de4365a2e82 upstream.
Driver initialization tries to request a hub (GTH) driver module from
its probe callback, resulting in a deadlock.
This patch solves the problem by adding a deferred work for requesting
the hub module.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Shishkin [Tue, 28 Jun 2016 15:55:23 +0000 (18:55 +0300)]
intel_th: pci: Add Kaby Lake PCH-H support
commit
7a1a47ce35821b40f5b2ce46379ba14393bc3873 upstream.
This adds Intel(R) Trace Hub PCI ID for Kaby Lake PCH-H.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitri Epshtein [Wed, 6 Jul 2016 02:18:58 +0000 (04:18 +0200)]
net: mvneta: set real interrupt per packet for tx_done
commit
06708f81528725148473c0869d6af5f809c6824b upstream.
Commit
aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay") intended to
set coalescing threshold to a value guaranteeing interrupt generation
per each sent packet, so that buffers can be released with no delay.
In fact setting threshold to '1' was wrong, because it causes interrupt
every two packets. According to the documentation a reason behind it is
following - interrupt occurs once sent buffers counter reaches a value,
which is higher than one specified in MVNETA_TXQ_SIZE_REG(q). This
behavior was confirmed during tests. Also when testing the SoC working
as a NAS device, better performance was observed with int-per-packet,
as it strongly depends on the fact that all transmitted packets are
released immediately.
This commit enables NETA controller work in interrupt per sent packet mode
by setting coalescing threshold to 0.
Signed-off-by: Dmitri Epshtein <dima@marvell.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Fixes
aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay")
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ilya Dryomov [Tue, 19 Jul 2016 01:50:28 +0000 (03:50 +0200)]
libceph: apply new_state before new_up_client on incrementals
commit
930c532869774ebf8af9efe9484c597f896a7d46 upstream.
Currently, osd_weight and osd_state fields are updated in the encoding
order. This is wrong, because an incremental map may look like e.g.
new_up_client: { osd=6, addr=... } # set osd_state and addr
new_state: { osd=6, xorstate=EXISTS } # clear osd_state
Suppose osd6's current osd_state is EXISTS (i.e. osd6 is down). After
applying new_up_client, osd_state is changed to EXISTS | UP. Carrying
on with the new_state update, we flip EXISTS and leave osd6 in a weird
"!EXISTS but UP" state. A non-existent OSD is considered down by the
mapping code
2087 for (i = 0; i < pg->pg_temp.len; i++) {
2088 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2089 if (ceph_can_shift_osds(pi))
2090 continue;
2091
2092 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
and so requests get directed to the second OSD in the set instead of
the first, resulting in OSD-side errors like:
[WRN] : client.4239 192.168.122.21:0/
2444980242 misdirected client.4239.1:2827 pg 2.
5df899f2 to osd.4 not [1,4,6] in e680/680
and hung rbds on the client:
[ 493.566367] rbd: rbd0: write 400000 at
11cc00000 (0)
[ 493.566805] rbd: rbd0: result -6 xferred 400000
[ 493.567011] blk_update_request: I/O error, dev rbd0, sector
9330688
The fix is to decouple application from the decoding and:
- apply new_weight first
- apply new_state before new_up_client
- twiddle osd_state flags if marking in
- clear out some of the state if osd is destroyed
Fixes: http://tracker.ceph.com/issues/14901
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tejun Heo [Mon, 18 Jul 2016 22:40:00 +0000 (18:40 -0400)]
libata: LITE-ON CX1-JB256-HP needs lower max_sectors
commit
1488a1e3828d60d74c9b802a05e24c0487babe4e upstream.
Since
34b48db66e08 ("block: remove artifical max_hw_sectors cap"),
max_sectors is no longer limited to BLK_DEF_MAX_SECTORS and LITE-ON
CX1-JB256-HP keeps timing out with higher max_sectors. Revert it to
the previous value.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: dgerasimov@gmail.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121671
Fixes:
34b48db66e08 ("block: remove artifical max_hw_sectors cap")
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukasz Gemborowski [Mon, 27 Jun 2016 10:57:47 +0000 (12:57 +0200)]
i2c: mux: reg: wrong condition checked for of_address_to_resource return value
commit
22ebf00eb56fe77922de8138aa9af9996582c2b3 upstream.
of_address_to_resource return 0 on successful call but
devm_ioremap_resource is called only if it returns non-zero value
Signed-off-by: Lukasz Gemborowski <lukasz.gemborowski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexey Dobriyan [Thu, 7 Jul 2016 22:39:11 +0000 (01:39 +0300)]
posix_cpu_timer: Exit early when process has been reaped
commit
2c13ce8f6b2f6fd9ba2f9261b1939fc0f62d1307 upstream.
Variable "now" seems to be genuinely used unintialized
if branch
if (CPUCLOCK_PERTHREAD(timer->it_clock)) {
is not taken and branch
if (unlikely(sighand == NULL)) {
is taken. In this case the process has been reaped and the timer is marked as
disarmed anyway. So none of the postprocessing of the sample is
required. Return right away.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Link: http://lkml.kernel.org/r/20160707223911.GA26483@p183.telecom.by
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
James Patrick-Evans [Fri, 15 Jul 2016 15:40:45 +0000 (16:40 +0100)]
media: fix airspy usb probe error path
commit
aa93d1fee85c890a34f2510a310e55ee76a27848 upstream.
Fix a memory leak on probe error of the airspy usb device driver.
The problem is triggered when more than 64 usb devices register with
v4l2 of type VFL_TYPE_SDR or VFL_TYPE_SUBDEV.
The memory leak is caused by the probe function of the airspy driver
mishandeling errors and not freeing the corresponding control structures
when an error occours registering the device to v4l2 core.
A badusb device can emulate 64 of these devices, and then through
continual emulated connect/disconnect of the 65th device, cause the
kernel to run out of RAM and crash the kernel, thus causing a local DOS
vulnerability.
Fixes CVE-2016-5400
Signed-off-by: James Patrick-Evans <james@jmp-e.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Brian King [Mon, 27 Jun 2016 14:09:40 +0000 (09:09 -0500)]
ipr: Clear interrupt on croc/crocodile when running with LSI
commit
54e430bbd490e18ab116afa4cd90dcc45787b3df upstream.
If we fall back to using LSI on the Croc or Crocodile chip we need to
clear the interrupt so we don't hang the system.
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alan Stern [Thu, 23 Jun 2016 19:05:26 +0000 (15:05 -0400)]
SCSI: fix new bug in scsi_dev_info_list string matching
commit
5e7ff2ca7f2da55fe777167849d0c93403bd0dc8 upstream.
Commit
b704f70ce200 ("SCSI: fix bug in scsi_dev_info_list matching")
changed the way vendor- and model-string matching was carried out in the
routine that looks up entries in a SCSI devinfo list. The new matching
code failed to take into account the case of a maximum-length string; in
such cases it could end up testing for a terminating '\0' byte beyond
the end of the memory allocated to the string. This out-of-bounds bug
was detected by UBSAN.
I don't know if anybody has actually encountered this bug. The symptom
would be that a device entry in the blacklist might not be matched
properly if it contained an 8-character vendor name or a 16-character
model name. Such entries certainly exist in scsi_static_device_list.
This patch fixes the problem by adding a check for a maximum-length
string before the '\0' test.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Fixes:
b704f70ce200 ("SCSI: fix bug in scsi_dev_info_list matching")
Tested-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vegard Nossum [Sun, 3 Jul 2016 08:54:54 +0000 (10:54 +0200)]
RDS: fix rds_tcp_init() error path
commit
3dad5424adfb346c871847d467f97dcdca64ea97 upstream.
If register_pernet_subsys() fails, we shouldn't try to call
unregister_pernet_subsys().
Fixes:
467fa15356 ("RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns.")
Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Oliver Hartkopp [Tue, 21 Jun 2016 13:45:47 +0000 (15:45 +0200)]
can: fix oops caused by wrong rtnl dellink usage
commit
25e1ed6e64f52a692ba3191c4fde650aab3ecc07 upstream.
For 'real' hardware CAN devices the netlink interface is used to set CAN
specific communication parameters. Real CAN hardware can not be created nor
removed with the ip tool ...
This patch adds a private dellink function for the CAN device driver interface
that does just nothing.
It's a follow up to commit
993e6f2fd ("can: fix oops caused by wrong rtnl
newlink usage") but for dellink.
Reported-by: ajneu <ajneu1@gmail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Oliver Hartkopp [Tue, 21 Jun 2016 10:14:07 +0000 (12:14 +0200)]
can: fix handling of unmodifiable configuration options fix
commit
bce271f255dae8335dc4d2ee2c4531e09cc67f5a upstream.
With upstream commit
bb208f144cf3f59 (can: fix handling of unmodifiable
configuration options) a new can_validate() function was introduced.
When invoking 'ip link set can0 type can' without any configuration data
can_validate() tries to validate the content without taking into account that
there's totally no content. This patch adds a check for missing content.
Reported-by: ajneu <ajneu1@gmail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thor Thayer [Thu, 16 Jun 2016 16:10:19 +0000 (11:10 -0500)]
can: c_can: Update D_CAN TX and RX functions to 32 bit - fix Altera Cyclone access
commit
427460c83cdf55069eee49799a0caef7dde8df69 upstream.
When testing CAN write floods on Altera's CycloneV, the first 2 bytes
are sometimes 0x00, 0x00 or corrupted instead of the values sent. Also
observed bytes 4 & 5 were corrupted in some cases.
The D_CAN Data registers are 32 bits and changing from 16 bit writes to
32 bit writes fixes the problem.
Testing performed on Altera CycloneV (D_CAN). Requesting tests on other
C_CAN & D_CAN platforms.
Reported-by: Richard Andrysek <richard.andrysek@gomtec.de>
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wolfgang Grandegger [Mon, 13 Jun 2016 13:44:19 +0000 (15:44 +0200)]
can: at91_can: RX queue could get stuck at high bus load
commit
43200a4480cbbe660309621817f54cbb93907108 upstream.
At high bus load it could happen that "at91_poll()" enters with all RX
message boxes filled up. If then at the end the "quota" is exceeded as
well, "rx_next" will not be reset to the first RX mailbox and hence the
interrupts remain disabled.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Tested-by: Amr Bekhit <amrbekhit@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephane Eranian [Thu, 3 Dec 2015 22:33:18 +0000 (23:33 +0100)]
perf/x86: fix PEBS issues on Intel Atom/Core2
commit
1424a09a9e1839285e948d4ea9fdfca26c9a2086 upstream.
This patch fixes broken PEBS support on Intel Atom and Core2
due to wrong pointer arithmetic in intel_pmu_drain_pebs_core().
The get_next_pebs_record_by_bit() was called on PEBS format fmt0
which does not use the pebs_record_nhm layout.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Fixes:
21509084f999 ("perf/x86/intel: Handle multiple records in the PEBS buffer")
Link: http://lkml.kernel.org/r/1449182000-31524-3-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Miklos Szeredi [Mon, 4 Jul 2016 14:49:48 +0000 (16:49 +0200)]
ovl: handle ATTR_KILL*
commit
b99c2d913810e56682a538c9f2394d76fca808f8 upstream.
Before
4bacc9c9234c ("overlayfs: Make f_path...") file->f_path pointed to
the underlying file, hence suid/sgid removal on write worked fine.
After that patch file->f_path pointed to the overlay file, and the file
mode bits weren't copied to overlay_inode->i_mode. So the suid/sgid
removal simply stopped working.
The fix is to copy the mode bits, but then ovl_setattr() needs to clear
ATTR_MODE to avoid the BUG() in notify_change(). So do this first, then in
the next patch copy the mode.
Reported-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes:
4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Cc: Eric Schultz <eric@startuperic.com>
Cc: Eric Hameleers <alien@slackware.com>
[backported by Eric Hameleers as seen in https://bugzilla.kernel.org/show_bug.cgi?id=150711]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstra [Fri, 24 Jun 2016 13:53:54 +0000 (15:53 +0200)]
sched/fair: Fix effective_load() to consistently use smoothed load
commit
7dd4912594daf769a46744848b05bd5bc6d62469 upstream.
Starting with the following commit:
fde7d22e01aa ("sched/fair: Fix overly small weight for interactive group entities")
calc_tg_weight() doesn't compute the right value as expected by effective_load().
The difference is in the 'correction' term. In order to ensure \Sum
rw_j >= rw_i we cannot use tg->load_avg directly, since that might be
lagging a correction on the current cfs_rq->avg.load_avg value.
Therefore we use tg->load_avg - cfs_rq->tg_load_avg_contrib +
cfs_rq->avg.load_avg.
Now, per the referenced commit, calc_tg_weight() doesn't use
cfs_rq->avg.load_avg, as is later used in @w, but uses
cfs_rq->load.weight instead.
So stop using calc_tg_weight() and do it explicitly.
The effects of this bug are wake_affine() making randomly
poor choices in cgroup-intense workloads.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes:
fde7d22e01aa ("sched/fair: Fix overly small weight for interactive group entities")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Taras Kondratiuk [Wed, 13 Jul 2016 22:05:38 +0000 (22:05 +0000)]
mmc: block: fix packed command header endianness
commit
f68381a70bb2b26c31b13fdaf67c778f92fd32b4 upstream.
The code that fills packed command header assumes that CPU runs in
little-endian mode. Hence the header is malformed in big-endian mode
and causes MMC data transfer errors:
[ 563.200828] mmcblk0: error -110 transferring data, sector 2048, nr 8, cmd response 0x900, card status 0xc40
[ 563.219647] mmcblk0: packed cmd failed, nr 2, sectors 16, failure index: -1
Convert header data to LE.
Signed-off-by: Taras Kondratiuk <takondra@cisco.com>
Fixes:
ce39f9d17c14 ("mmc: support packed write command for eMMC4.5 devices")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Omar Sandoval [Fri, 1 Jul 2016 07:39:35 +0000 (00:39 -0700)]
block: fix use-after-free in sys_ioprio_get()
commit
8ba8682107ee2ca3347354e018865d8e1967c5f4 upstream.
get_task_ioprio() accesses the task->io_context without holding the task
lock and thus can race with exit_io_context(), leading to a
use-after-free. The reproducer below hits this within a few seconds on
my 4-core QEMU VM:
#define _GNU_SOURCE
#include <assert.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/wait.h>
int main(int argc, char **argv)
{
pid_t pid, child;
long nproc, i;
/* ioprio_set(IOPRIO_WHO_PROCESS, 0, IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)); */
syscall(SYS_ioprio_set, 1, 0, 0x6000);
nproc = sysconf(_SC_NPROCESSORS_ONLN);
for (i = 0; i < nproc; i++) {
pid = fork();
assert(pid != -1);
if (pid == 0) {
for (;;) {
pid = fork();
assert(pid != -1);
if (pid == 0) {
_exit(0);
} else {
child = wait(NULL);
assert(child == pid);
}
}
}
pid = fork();
assert(pid != -1);
if (pid == 0) {
for (;;) {
/* ioprio_get(IOPRIO_WHO_PGRP, 0); */
syscall(SYS_ioprio_get, 2, 0);
}
}
}
for (;;) {
/* ioprio_get(IOPRIO_WHO_PGRP, 0); */
syscall(SYS_ioprio_get, 2, 0);
}
return 0;
}
This gets us KASAN dumps like this:
[ 35.526914] ==================================================================
[ 35.530009] BUG: KASAN: out-of-bounds in get_task_ioprio+0x7b/0x90 at addr
ffff880066f34e6c
[ 35.530009] Read of size 2 by task ioprio-gpf/363
[ 35.530009] =============================================================================
[ 35.530009] BUG blkdev_ioc (Not tainted): kasan: bad access detected
[ 35.530009] -----------------------------------------------------------------------------
[ 35.530009] Disabling lock debugging due to kernel taint
[ 35.530009] INFO: Allocated in create_task_io_context+0x2b/0x370 age=0 cpu=0 pid=360
[ 35.530009] ___slab_alloc+0x55d/0x5a0
[ 35.530009] __slab_alloc.isra.20+0x2b/0x40
[ 35.530009] kmem_cache_alloc_node+0x84/0x200
[ 35.530009] create_task_io_context+0x2b/0x370
[ 35.530009] get_task_io_context+0x92/0xb0
[ 35.530009] copy_process.part.8+0x5029/0x5660
[ 35.530009] _do_fork+0x155/0x7e0
[ 35.530009] SyS_clone+0x19/0x20
[ 35.530009] do_syscall_64+0x195/0x3a0
[ 35.530009] return_from_SYSCALL_64+0x0/0x6a
[ 35.530009] INFO: Freed in put_io_context+0xe7/0x120 age=0 cpu=0 pid=1060
[ 35.530009] __slab_free+0x27b/0x3d0
[ 35.530009] kmem_cache_free+0x1fb/0x220
[ 35.530009] put_io_context+0xe7/0x120
[ 35.530009] put_io_context_active+0x238/0x380
[ 35.530009] exit_io_context+0x66/0x80
[ 35.530009] do_exit+0x158e/0x2b90
[ 35.530009] do_group_exit+0xe5/0x2b0
[ 35.530009] SyS_exit_group+0x1d/0x20
[ 35.530009] entry_SYSCALL_64_fastpath+0x1a/0xa4
[ 35.530009] INFO: Slab 0xffffea00019bcd00 objects=20 used=4 fp=0xffff880066f34ff0 flags=0x1fffe0000004080
[ 35.530009] INFO: Object 0xffff880066f34e58 @offset=3672 fp=0x0000000000000001
[ 35.530009] ==================================================================
Fix it by grabbing the task lock while we poke at the io_context.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ursula Braun [Mon, 4 Jul 2016 12:07:16 +0000 (14:07 +0200)]
qeth: delete napi struct when removing a qeth device
commit
7831b4ff0d926e0deeaabef9db8800ed069a2757 upstream.
A qeth_card contains a napi_struct linked to the net_device during
device probing. This struct must be deleted when removing the qeth
device, otherwise Panic on oops can occur when qeth devices are
repeatedly removed and added.
Fixes:
a1c3ed4c9ca ("qeth: NAPI support for l2 and l3 discipline")
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Tested-by: Alexander Klein <ALKL@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Carpenter [Tue, 21 Jun 2016 13:58:46 +0000 (16:58 +0300)]
platform/chrome: cros_ec_dev - double fetch bug in ioctl
commit
096cdc6f52225835ff503f987a0d68ef770bb78e upstream.
We verify "u_cmd.outsize" and "u_cmd.insize" but we need to make sure
that those values have not changed between the two copy_from_user()
calls. Otherwise it could lead to a buffer overflow.
Additionally, cros_ec_cmd_xfer() can set s_cmd->insize to a lower value.
We should use the new smaller value so we don't copy too much data to
the user.
Reported-by: Pengfei Wang <wpengfeinudt@gmail.com>
Fixes:
a841178445bb ('mfd: cros_ec: Use a zero-length array for command data')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Heiko Stuebner [Tue, 17 May 2016 18:57:50 +0000 (20:57 +0200)]
clk: rockchip: initialize flags of clk_init_data in mmc-phase clock
commit
595144c1141c951a3c6bb9004ae6a2bc29aad66f upstream.
The flags element of clk_init_data was never initialized for mmc-
phase-clocks resulting in the element containing a random value
and thus possibly enabling unwanted clock flags.
Fixes:
89bf26cbc1a0 ("clk: rockchip: Add support for the mmc clock phases using the framework")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michal Suchanek [Mon, 13 Jun 2016 17:46:49 +0000 (17:46 +0000)]
spi: sun4i: fix FIFO limit
commit
6d9fe44bd73d567d04d3a68a2d2fa521ab9532f2 upstream.
When testing SPI without DMA I noticed that filling the FIFO on the
spi controller causes timeout.
Always leave room for one byte in the FIFO.
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michal Suchanek [Mon, 13 Jun 2016 17:46:49 +0000 (17:46 +0000)]
spi: sunxi: fix transfer timeout
commit
719bd6542044efd9b338a53dba1bef45f40ca169 upstream.
The trasfer timeout is fixed at 1000 ms. Reading a 4Mbyte flash over
1MHz SPI bus takes way longer than that. Calculate the timeout from the
actual time the transfer is supposed to take and multiply by 2 for good
measure.
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Ulanov [Fri, 15 Apr 2016 21:24:41 +0000 (14:24 -0700)]
namespace: update event counter when umounting a deleted dentry
commit
e06b933e6ded42384164d28a2060b7f89243b895 upstream.
- m_start() in fs/namespace.c expects that ns->event is incremented each
time a mount added or removed from ns->list.
- umount_tree() removes items from the list but does not increment event
counter, expecting that it's done before the function is called.
- There are some codepaths that call umount_tree() without updating
"event" counter. e.g. from __detach_mounts().
- When this happens m_start may reuse a cached mount structure that no
longer belongs to ns->list (i.e. use after free which usually leads
to infinite loop).
This change fixes the above problem by incrementing global event counter
before invoking umount_tree().
Change-Id: I622c8e84dcb9fb63542372c5dbf0178ee86bb589
Signed-off-by: Andrey Ulanov <andreyu@google.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Miklos Szeredi [Wed, 29 Jun 2016 08:54:23 +0000 (10:54 +0200)]
9p: use file_dentry()
commit
b403f0e37a11f84f7ceaf40b0075499e5bcfd220 upstream.
v9fs may be used as lower layer of overlayfs and accessing f_path.dentry
can lead to a crash. In this case it's a NULL pointer dereference in
p9_fid_create().
Fix by replacing direct access of file->f_path.dentry with the
file_dentry() accessor, which will always return a native object.
Reported-by: Alessio Igor Bogani <alessioigorbogani@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Alessio Igor Bogani <alessioigorbogani@gmail.com>
Fixes:
4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vegard Nossum [Fri, 15 Jul 2016 04:22:07 +0000 (00:22 -0400)]
ext4: verify extent header depth
commit
7bc9491645118c9461bd21099c31755ff6783593 upstream.
Although the extent tree depth of 5 should enough be for the worst
case of 2*32 extents of length 1, the extent tree code does not
currently to merge nodes which are less than half-full with a sibling
node, or to shrink the tree depth if possible. So it's possible, at
least in theory, for the tree depth to be greater than 5. However,
even in the worst case, a tree depth of 32 is highly unlikely, and if
the file system is maliciously corrupted, an insanely large eh_depth
can cause memory allocation failures that will trigger kernel warnings
(here, eh_depth = 65280):
JBD2: ext4.exe wants too many credits credits:195849 rsv_credits:0 max:256
------------[ cut here ]------------
WARNING: CPU: 0 PID: 50 at fs/jbd2/transaction.c:293 start_this_handle+0x569/0x580
CPU: 0 PID: 50 Comm: ext4.exe Not tainted 4.7.0-rc5+ #508
Stack:
604a8947 625badd8 0002fd09 00000000
60078643 00000000 62623910 601bf9bc
62623970 6002fc84 626239b0 900000125
Call Trace:
[<
6001c2dc>] show_stack+0xdc/0x1a0
[<
601bf9bc>] dump_stack+0x2a/0x2e
[<
6002fc84>] __warn+0x114/0x140
[<
6002fdff>] warn_slowpath_null+0x1f/0x30
[<
60165829>] start_this_handle+0x569/0x580
[<
60165d4e>] jbd2__journal_start+0x11e/0x220
[<
60146690>] __ext4_journal_start_sb+0x60/0xa0
[<
60120a81>] ext4_truncate+0x131/0x3a0
[<
60123677>] ext4_setattr+0x757/0x840
[<
600d5d0f>] notify_change+0x16f/0x2a0
[<
600b2b16>] do_truncate+0x76/0xc0
[<
600c3e56>] path_openat+0x806/0x1300
[<
600c55c9>] do_filp_open+0x89/0xf0
[<
600b4074>] do_sys_open+0x134/0x1e0
[<
600b4140>] SyS_open+0x20/0x30
[<
6001ea68>] handle_syscall+0x88/0x90
[<
600295fd>] userspace+0x3fd/0x500
[<
6001ac55>] fork_handler+0x85/0x90
---[ end trace
08b0b88b6387a244 ]---
[ Commit message modified and the extent tree depath check changed
from 5 to 32 -- tytso ]
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jeff Mahoney [Tue, 5 Jul 2016 21:32:30 +0000 (17:32 -0400)]
ecryptfs: don't allow mmap when the lower fs doesn't support it
commit
f0fe970df3838c202ef6c07a4c2b36838ef0a88b upstream.
There are legitimate reasons to disallow mmap on certain files, notably
in sysfs or procfs. We shouldn't emulate mmap support on file systems
that don't offer support natively.
CVE-2016-1583
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
[tyhicks: clean up f_op check by using ecryptfs_file_to_lower()]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jeff Mahoney [Tue, 5 Jul 2016 21:32:29 +0000 (17:32 -0400)]
Revert "ecryptfs: forbid opening files without mmap handler"
commit
78c4e172412de5d0456dc00d2b34050aa0b683b5 upstream.
This reverts commit
2f36db71009304b3f0b95afacd8eba1f9f046b87.
It fixed a local root exploit but also introduced a dependency on
the lower file system implementing an mmap operation just to open a file,
which is a bit of a heavy hammer. The right fix is to have mmap depend
on the existence of the mmap handler instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Miklos Szeredi [Fri, 1 Jul 2016 12:56:07 +0000 (14:56 +0200)]
locks: use file_inode()
commit
6343a2120862f7023006c8091ad95c1f16a32077 upstream.
(Another one for the f_path debacle.)
ltp fcntl33 testcase caused an Oops in selinux_file_send_sigiotask.
The reason is that generic_add_lease() used filp->f_path.dentry->inode
while all the others use file_inode(). This makes a difference for files
opened on overlayfs since the former will point to the overlay inode the
latter to the underlying inode.
So generic_add_lease() added the lease to the overlay inode and
generic_delete_lease() removed it from the underlying inode. When the file
was released the lease remained on the overlay inode's lock list, resulting
in use after free.
Reported-by: Eryu Guan <eguan@redhat.com>
Fixes:
4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rhyland Klein [Thu, 9 Jun 2016 21:28:39 +0000 (17:28 -0400)]
power_supply: power_supply_read_temp only if use_cnt > 0
commit
5bc28b93a36e3cb3acc2870fb75cb6ffb182fece upstream.
Change power_supply_read_temp() to use power_supply_get_property()
so that it will check the use_cnt and ensure it is > 0. The use_cnt
will be incremented at the end of __power_supply_register, so this
will block to case where get_property can be called before the supply
is fully registered. This fixes the issue show in the stack below:
[ 1.452598] power_supply_read_temp+0x78/0x80
[ 1.458680] thermal_zone_get_temp+0x5c/0x11c
[ 1.464765] thermal_zone_device_update+0x34/0xb4
[ 1.471195] thermal_zone_device_register+0x87c/0x8cc
[ 1.477974] __power_supply_register+0x364/0x424
[ 1.484317] power_supply_register_no_ws+0x10/0x18
[ 1.490833] bq27xxx_battery_setup+0x10c/0x164
[ 1.497003] bq27xxx_battery_i2c_probe+0xd0/0x1b0
[ 1.503435] i2c_device_probe+0x174/0x240
[ 1.509172] driver_probe_device+0x1fc/0x29c
[ 1.515167] __driver_attach+0xa4/0xa8
[ 1.520643] bus_for_each_dev+0x58/0x98
[ 1.526204] driver_attach+0x20/0x28
[ 1.531505] bus_add_driver+0x1c8/0x22c
[ 1.537067] driver_register+0x68/0x108
[ 1.542630] i2c_register_driver+0x38/0x7c
[ 1.548457] bq27xxx_battery_i2c_driver_init+0x18/0x20
[ 1.555321] do_one_initcall+0x38/0x12c
[ 1.560886] kernel_init_freeable+0x148/0x1ec
[ 1.566972] kernel_init+0x10/0xfc
[ 1.572101] ret_from_fork+0x10/0x40
Also make the same change to ps_get_max_charge_cntl_limit() and
ps_get_cur_chrage_cntl_limit() to be safe. Lastly, change the return
value of power_supply_get_property() to -EAGAIN from -ENODEV if
use_cnt <= 0.
Fixes:
297d716f6260 ("power_supply: Change ownership from driver to core")
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tejun Heo [Thu, 26 May 2016 19:42:13 +0000 (15:42 -0400)]
cgroup: set css->id to -1 during init
commit
8fa3b8d689a54d6d04ff7803c724fb7aca6ce98e upstream.
If percpu_ref initialization fails during css_create(), the free path
can end up trying to free css->id of zero. As ID 0 is unused, it
doesn't cause a critical breakage but it does trigger a warning
message. Fix it by setting css->id to -1 from init_and_link_css().
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Wenwei Tao <ww.tao0320@gmail.com>
Fixes:
01e586598b22 ("cgroup: release css->id after css_free")
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Shiyan [Wed, 1 Jun 2016 19:21:53 +0000 (22:21 +0300)]
pinctrl: imx: Do not treat a PIN without MUX register as an error
commit
ba562d5e54fd3136bfea0457add3675850247774 upstream.
Some PINs do not have a MUX register, it is not an error.
It is necessary to allow the continuation of the PINs configuration,
otherwise the whole PIN-group will be configured incorrectly.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tony Lindgren [Tue, 31 May 2016 21:17:06 +0000 (14:17 -0700)]
pinctrl: single: Fix missing flush of posted write for a wakeirq
commit
0ac3c0a4025f41748a083bdd4970cb3ede802b15 upstream.
With many repeated suspend resume cycles, the pin specific wakeirq
may not always work on omaps. This is because the write to enable the
pin interrupt may not have reached the device over the interconnect
before suspend happens.
Let's fix the issue with a flush of posted write with a readback.
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Minfei Huang [Fri, 27 May 2016 06:17:10 +0000 (14:17 +0800)]
pvclock: Add CPU barriers to get correct version value
commit
749d088b8e7f4b9826ede02b9a043e417fa84aa1 upstream.
Protocol for the "version" fields is: hypervisor raises it (making it
uneven) before it starts updating the fields and raises it again (making
it even) when it is done. Thus the guest can make sure the time values
it got are consistent by checking the version before and after reading
them.
Add CPU barries after getting version value just like what function
vread_pvclock does, because all of callees in this function is inline.
Fixes:
502dfeff239e8313bfbe906ca0a1a6827ac8481b
Signed-off-by: Minfei Huang <mnghuan@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael Welling [Wed, 20 Jul 2016 17:02:07 +0000 (10:02 -0700)]
Input: tsc200x - report proper input_dev name
commit
e9003c9cfaa17d26991688268b04244adb67ee2b upstream.
Passes input_id struct to the common probe function for the tsc200x drivers
instead of just the bustype.
This allows for the use of the product variable to set the input_dev->name
variable according to the type of touchscreen used. Note that when we
introduced support for TSC2004 we started calling everything TSC200X, so
let's keep this quirk.
Signed-off-by: Michael Welling <mwelling@ieee.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cameron Gutman [Wed, 29 Jun 2016 16:51:35 +0000 (09:51 -0700)]
Input: xpad - validate USB endpoint count during probe
commit
caca925fca4fb30c67be88cacbe908eec6721e43 upstream.
This prevents a malicious USB device from causing an oops.
Signed-off-by: Cameron Gutman <aicommander@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ping Cheng [Thu, 23 Jun 2016 17:54:17 +0000 (10:54 -0700)]
Input: wacom_w8001 - w8001_MAX_LENGTH should be 13
commit
12afb34400eb2b301f06b2aa3535497d14faee59 upstream.
Somehow the patch that added two-finger touch support forgot to update
W8001_MAX_LENGTH from 11 to 13.
Signed-off-by: Ping Cheng <pingc@wacom.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cameron Gutman [Thu, 23 Jun 2016 17:24:42 +0000 (10:24 -0700)]
Input: xpad - fix oops when attaching an unknown Xbox One gamepad
commit
c7f1429389ec1aa25e042bb13451385fbb596f8c upstream.
Xbox One controllers have multiple interfaces which all have the
same class, subclass, and protocol. One of the these interfaces
has only a single endpoint. When Xpad attempts to bind to this
interface, it causes an oops when trying initialize the output URB
by trying to access the second endpoint's descriptor.
This situation was avoided for known Xbox One devices by checking
the XTYPE constant associated with the VID and PID tuple. However,
this breaks when new or previously unknown Xbox One controllers
are attached to the system.
This change addresses the problem by deriving the XTYPE for Xbox
One controllers based on the interface protocol before checking
the interface number.
Fixes:
1a48ff81b391 ("Input: xpad - add support for Xbox One controllers")
Signed-off-by: Cameron Gutman <aicommander@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Torokhov [Tue, 21 Jun 2016 23:09:00 +0000 (16:09 -0700)]
Input: elantech - add more IC body types to the list
commit
226ba707744a51acb4244724e09caacb1d96aed9 upstream.
The touchpad in HP Pavilion 14-
ab057ca reports it's version as 12 and
according to Elan both 11 and 12 are valid IC types and should be
identified as hw_version 4.
Reported-by: Patrick Lessard <Patrick.Lessard@cogeco.com>
Tested-by: Patrick Lessard <Patrick.Lessard@cogeco.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sinclair Yeh [Fri, 24 Jun 2016 00:37:34 +0000 (17:37 -0700)]
Input: vmmouse - remove port reservation
commit
60842ef8128e7bf58c024814cd0dc14319232b6c upstream.
The VMWare EFI BIOS will expose port 0x5658 as an ACPI resource. This
causes the port to be reserved by the APCI module as the system comes up,
making it unavailable to be reserved again by other drivers, thus
preserving this VMWare port for special use in a VMWare guest.
This port is designed to be shared among multiple VMWare services, such as
the VMMOUSE. Because of this, VMMOUSE should not try to reserve this port
on its own.
The VMWare non-EFI BIOS does not do this to preserve compatibility with
existing/legacy VMs. It is known that there is small chance a VM may be
configured such that these ports get reserved by other non-VMWare devices,
and if this ever happens, the result is undefined.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kangjie Lu [Tue, 3 May 2016 20:44:32 +0000 (16:44 -0400)]
ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt
commit
e4ec8cc8039a7063e24204299b462bd1383184a5 upstream.
The stack object “r1” has a total size of 32 bytes. Its field
“event” and “val” both contain 4 bytes padding. These 8 bytes
padding bytes are sent to user without being initialized.
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kangjie Lu [Tue, 3 May 2016 20:44:20 +0000 (16:44 -0400)]
ALSA: timer: Fix leak in events via snd_timer_user_ccallback
commit
9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6 upstream.
The stack object “r1” has a total size of 32 bytes. Its field
“event” and “val” both contain 4 bytes padding. These 8 bytes
padding bytes are sent to user without being initialized.
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kangjie Lu [Tue, 3 May 2016 20:44:07 +0000 (16:44 -0400)]
ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS
commit
cec8f96e49d9be372fdb0c3836dcf31ec71e457e upstream.
The stack object “tread” has a total size of 32 bytes. Its field
“event” and “val” both contain 4 bytes padding. These 8 bytes
padding bytes are sent to user without being initialized.
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jan Beulich [Thu, 7 Jul 2016 07:32:04 +0000 (01:32 -0600)]
xenbus: don't bail early from xenbus_dev_request_and_reply()
commit
7469be95a487319514adce2304ad2af3553d2fc9 upstream.
xenbus_dev_request_and_reply() needs to track whether a transaction is
open. For XS_TRANSACTION_START messages it calls transaction_start()
and for XS_TRANSACTION_END messages it calls transaction_end().
If sending an XS_TRANSACTION_START message fails or responds with an
an error, the transaction is not open and transaction_end() must be
called.
If sending an XS_TRANSACTION_END message fails, the transaction is
still open, but if an error response is returned the transaction is
closed.
Commit
027bd7e89906 ("xen/xenbus: Avoid synchronous wait on XenBus
stalling shutdown/restart") introduced a regression where failed
XS_TRANSACTION_START messages were leaving the transaction open. This
can cause problems with suspend (and migration) as all transactions
must be closed before suspending.
It appears that the problematic change was added accidentally, so just
remove it.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jan Beulich [Thu, 7 Jul 2016 07:23:57 +0000 (01:23 -0600)]
xenbus: don't BUG() on user mode induced condition
commit
0beef634b86a1350c31da5fcc2992f0d7c8a622b upstream.
Inability to locate a user mode specified transaction ID should not
lead to a kernel crash. For other than XS_TRANSACTION_START also
don't issue anything to xenbus if the specified ID doesn't match that
of any active transaction.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Grodzovsky [Tue, 21 Jun 2016 18:26:36 +0000 (14:26 -0400)]
xen/pciback: Fix conf_space read/write overlap check.
commit
02ef871ecac290919ea0c783d05da7eedeffc10e upstream.
Current overlap check is evaluating to false a case where a filter
field is fully contained (proper subset) of a r/w request. This
change applies classical overlap check instead to include all the
scenarios.
More specifically, for (Hilscher GmbH CIFX 50E-DP(M/S)) device driver
the logic is such that the entire confspace is read and written in 4
byte chunks. In this case as an example, CACHE_LINE_SIZE,
LATENCY_TIMER and PCI_BIST are arriving together in one call to
xen_pcibk_config_write() with offset == 0xc and size == 4. With the
exsisting overlap check the LATENCY_TIMER field (offset == 0xd, length
== 1) is fully contained in the write request and hence is excluded
from write, which is incorrect.
Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vineet Gupta [Tue, 28 Jun 2016 04:12:25 +0000 (09:42 +0530)]
ARC: unwind: ensure that .debug_frame is generated (vs. .eh_frame)
commit
f52e126cc7476196f44f3c313b7d9f0699a881fc upstream.
With recent binutils update to support dwarf CFI pseudo-ops in gas, we
now get .eh_frame vs. .debug_frame. Although the call frame info is
exactly the same in both, the CIE differs, which the current kernel
unwinder can't cope with.
This broke both the kernel unwinder as well as loadable modules (latter
because of a new unhandled relo R_ARC_32_PCREL from .rela.eh_frame in
the module loader)
The ideal solution would be to switch unwinder to .eh_frame.
For now however we can make do by just ensureing .debug_frame is
generated by removing -fasynchronous-unwind-tables
.eh_frame generated with -gdwarf-2 -fasynchronous-unwind-tables
.debug_frame generated with -gdwarf-2
Fixes STAR
9001058196
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexey Brodkin [Thu, 23 Jun 2016 08:00:39 +0000 (11:00 +0300)]
arc: unwind: warn only once if DW2_UNWIND is disabled
commit
9bd54517ee86cb164c734f72ea95aeba4804f10b upstream.
If CONFIG_ARC_DW2_UNWIND is disabled every time arc_unwind_core()
gets called following message gets printed in debug console:
----------------->8---------------
CONFIG_ARC_DW2_UNWIND needs to be enabled
----------------->8---------------
That message makes sense if user indeed wants to see a backtrace or
get nice function call-graphs in perf but what if user disabled
unwinder for the purpose? Why pollute his debug console?
So instead we'll warn user about possibly missing feature once and
let him decide if that was what he or she really wanted.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Ryabinin [Thu, 9 Jun 2016 12:20:05 +0000 (15:20 +0300)]
kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w
commit
57675cb976eff977aefb428e68e4e0236d48a9ff upstream.
Lengthy output of sysrq-w may take a lot of time on slow serial console.
Currently we reset NMI-watchdog on the current CPU to avoid spurious
lockup messages. Sometimes this doesn't work since softlockup watchdog
might trigger on another CPU which is waiting for an IPI to proceed.
We reset softlockup watchdogs on all CPUs, but we do this only after
listing all tasks, and this may be too late on a busy system.
So, reset watchdogs CPUs earlier, in for_each_process_thread() loop.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1465474805-14641-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Slaby [Wed, 20 Jul 2016 22:45:08 +0000 (15:45 -0700)]
pps: do not crash when failed to register
commit
368301f2fe4b07e5fb71dba3cc566bc59eb6705f upstream.
With this command sequence:
modprobe plip
modprobe pps_parport
rmmod pps_parport
the partport_pps modules causes this crash:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: parport_detach+0x1d/0x60 [pps_parport]
Oops: 0000 [#1] SMP
...
Call Trace:
parport_unregister_driver+0x65/0xc0 [parport]
SyS_delete_module+0x187/0x210
The sequence that builds up to this is:
1) plip is loaded and takes the parport device for exclusive use:
plip0: Parallel port at 0x378, using IRQ 7.
2) pps_parport then fails to grab the device:
pps_parport: parallel port PPS client
parport0: cannot grant exclusive access for device pps_parport
pps_parport: couldn't register with parport0
3) rmmod of pps_parport is then killed because it tries to access
pardev->name, but pardev (taken from port->cad) is NULL.
So add a check for NULL in the test there too.
Link: http://lkml.kernel.org/r/20160714115245.12651-1-jslaby@suse.cz
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Vyukov [Thu, 14 Jul 2016 19:07:29 +0000 (12:07 -0700)]
vmlinux.lds: account for destructor sections
commit
e41f501d391265ff568f3e49d6128cc30856a36f upstream.
If CONFIG_KASAN is enabled and gcc is configured with
--disable-initfini-array and/or gold linker is used, gcc emits
.ctors/.dtors and .text.startup/.text.exit sections instead of
.init_array/.fini_array. .dtors section is not explicitly accounted in
the linker script and messes vvar/percpu layout.
We want:
ffffffff822bfd80 D _edata
ffffffff822c0000 D __vvar_beginning_hack
ffffffff822c0000 A __vvar_page
ffffffff822c0080 0000000000000098 D vsyscall_gtod_data
ffffffff822c1000 A __init_begin
ffffffff822c1000 D init_per_cpu__irq_stack_union
ffffffff822c1000 A __per_cpu_load
ffffffff822d3000 D init_per_cpu__gdt_page
We got:
ffffffff8279a600 D _edata
ffffffff8279b000 A __vvar_page
ffffffff8279c000 A __init_begin
ffffffff8279c000 D init_per_cpu__irq_stack_union
ffffffff8279c000 A __per_cpu_load
ffffffff8279e000 D __vvar_beginning_hack
ffffffff8279e080 0000000000000098 D vsyscall_gtod_data
ffffffff827ae000 D init_per_cpu__gdt_page
This happens because __vvar_page and .vvar get different addresses in
arch/x86/kernel/vmlinux.lds.S:
. = ALIGN(PAGE_SIZE);
__vvar_page = .;
.vvar : AT(ADDR(.vvar) - LOAD_OFFSET) {
/* work around gold bug 13023 */
__vvar_beginning_hack = .;
Discard .dtors/.fini_array/.text.exit, since we don't call dtors.
Merge .text.startup into init text.
Link: http://lkml.kernel.org/r/1467386363-120030-1-git-send-email-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Thu, 14 Jul 2016 19:07:23 +0000 (12:07 -0700)]
mm, meminit: ensure node is online before checking whether pages are uninitialised
commit
ef70b6f41cda6270165a6f27b2548ed31cfa3cb2 upstream.
early_page_uninitialised looks up an arbitrary PFN. While a machine
without node 0 will boot with "mm, page_alloc: Always return a valid
node from early_pfn_to_nid", it works because it assumes that nodes are
always in PFN order. This is not guaranteed so this patch adds
robustness by always checking if the node being checked is online.
Link: http://lkml.kernel.org/r/1468008031-3848-4-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Thu, 14 Jul 2016 19:07:20 +0000 (12:07 -0700)]
mm, meminit: always return a valid node from early_pfn_to_nid
commit
e4568d3803852d00effd41dcdd489e726b998879 upstream.
early_pfn_to_nid can return node 0 if a PFN is invalid on machines that
has no node 0. A machine with only node 1 was observed to crash with
the following message:
BUG: unable to handle kernel paging request at
000000000002a3c8
PGD 0
Modules linked in:
Hardware name: Supermicro H8DSP-8/H8DSP-8, BIOS 080011 06/30/2006
task:
ffffffff81c0d500 ti:
ffffffff81c00000 task.ti:
ffffffff81c00000
RIP: reserve_bootmem_region+0x6a/0xef
CR2:
000000000002a3c8 CR3:
0000000001c06000 CR4:
00000000000006b0
Call Trace:
free_all_bootmem+0x4b/0x12a
mem_init+0x70/0xa3
start_kernel+0x25b/0x49b
The problem is that early_page_uninitialised uses the early_pfn_to_nid
helper which returns node 0 for invalid PFNs. No caller of
early_pfn_to_nid cares except early_page_uninitialised. This patch has
early_pfn_to_nid always return a valid node.
Link: http://lkml.kernel.org/r/1468008031-3848-3-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Rientjes [Thu, 14 Jul 2016 19:06:50 +0000 (12:06 -0700)]
mm, compaction: prevent VM_BUG_ON when terminating freeing scanner
commit
a46cbf3bc53b6a93fb84a5ffb288c354fa807954 upstream.
It's possible to isolate some freepages in a pageblock and then fail
split_free_page() due to the low watermark check. In this case, we hit
VM_BUG_ON() because the freeing scanner terminated early without a
contended lock or enough freepages.
This should never have been a VM_BUG_ON() since it's not a fatal
condition. It should have been a VM_WARN_ON() at best, or even handled
gracefully.
Regardless, we need to terminate anytime the full pageblock scan was not
done. The logic belongs in isolate_freepages_block(), so handle its
state gracefully by terminating the pageblock loop and making a note to
restart at the same pageblock next time since it was not possible to
complete the scan this time.
[rientjes@google.com: don't rescan pages in a pageblock]
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1607111244150.83138@chino.kir.corp.google.com
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1606291436300.145590@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Minchan Kim <minchan@kernel.org>
Tested-by: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Torsten Hilbrich [Fri, 24 Jun 2016 21:50:18 +0000 (14:50 -0700)]
fs/nilfs2: fix potential underflow in call to crc32_le
commit
63d2f95d63396059200c391ca87161897b99e74a upstream.
The value `bytes' comes from the filesystem which is about to be
mounted. We cannot trust that the value is always in the range we
expect it to be.
Check its value before using it to calculate the length for the crc32_le
call. It value must be larger (or equal) sumoff + 4.
This fixes a kernel bug when accidentially mounting an image file which
had the nilfs2 magic value 0x3434 at the right offset 0x406 by chance.
The bytes 0x01 0x00 were stored at 0x408 and were interpreted as a
s_bytes value of 1. This caused an underflow when substracting sumoff +
4 (20) in the call to crc32_le.
BUG: unable to handle kernel paging request at
ffff88021e600000
IP: crc32_le+0x36/0x100
...
Call Trace:
nilfs_valid_sb.part.5+0x52/0x60 [nilfs2]
nilfs_load_super_block+0x142/0x300 [nilfs2]
init_nilfs+0x60/0x390 [nilfs2]
nilfs_mount+0x302/0x520 [nilfs2]
mount_fs+0x38/0x160
vfs_kern_mount+0x67/0x110
do_mount+0x269/0xe00
SyS_mount+0x9f/0x100
entry_SYSCALL_64_fastpath+0x16/0x71
Link: http://lkml.kernel.org/r/1466778587-5184-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Tested-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Rientjes [Fri, 24 Jun 2016 21:50:10 +0000 (14:50 -0700)]
mm, compaction: abort free scanner if split fails
commit
a4f04f2c6955aff5e2c08dcb40aca247ff4d7370 upstream.
If the memory compaction free scanner cannot successfully split a free
page (only possible due to per-zone low watermark), terminate the free
scanner rather than continuing to scan memory needlessly. If the
watermark is insufficient for a free page of order <= cc->order, then
terminate the scanner since all future splits will also likely fail.
This prevents the compaction freeing scanner from scanning all memory on
very large zones (very noticeable for zones > 128GB, for instance) when
all splits will likely fail while holding zone->lock.
compaction_alloc() iterating a 128GB zone has been benchmarked to take
over 400ms on some systems whereas any free page isolated and ready to
be split ends up failing in split_free_page() because of the low
watermark check and thus the iteration continues.
The next time compaction occurs, the freeing scanner will likely start
at the end of the zone again since no success was made previously and we
get the same lengthy iteration until the zone is brought above the low
watermark. All thp page faults can take >400ms in such a state without
this fix.
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1606211820350.97086@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Fri, 24 Jun 2016 21:49:37 +0000 (14:49 -0700)]
mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask
commit
e838a45f9392a5bd2be1cd3ab0b16ae85857461c upstream.
Commit
d0164adc89f6 ("mm, page_alloc: distinguish between being unable
to sleep, unwilling to sleep and avoiding waking kswapd") modified
__GFP_WAIT to explicitly identify the difference between atomic callers
and those that were unwilling to sleep. Later the definition was
removed entirely.
The GFP_RECLAIM_MASK is the set of flags that affect watermark checking
and reclaim behaviour but __GFP_ATOMIC was never added. Without it,
atomic users of the slab allocator strip the __GFP_ATOMIC flag and
cannot access the page allocator atomic reserves. This patch addresses
the problem.
The user-visible impact depends on the workload but potentially atomic
allocations unnecessarily fail without this path.
Link: http://lkml.kernel.org/r/20160610093832.GK2527@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reported-by: Marcin Wojtas <mw@semihalf.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ludovic Desroches [Thu, 12 May 2016 14:54:10 +0000 (16:54 +0200)]
dmaengine: at_xdmac: double FIFO flush needed to compute residue
commit
9295c41d77ca93aac79cfca6fa09fa1ca5cab66f upstream.
Due to the way CUBC register is updated, a double flush is needed to
compute an accurate residue. First flush aim is to get data from the DMA
FIFO and second one ensures that we won't report data which are not in
memory.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes:
e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ludovic Desroches [Thu, 12 May 2016 14:54:09 +0000 (16:54 +0200)]
dmaengine: at_xdmac: fix residue corruption
commit
53398f488821c2b5b15291e3debec6ad33f75d3d upstream.
An unexpected value of CUBC can lead to a corrupted residue. A more
complex sequence is needed to detect an inaccurate value for NCA or CUBC.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes:
e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ludovic Desroches [Thu, 12 May 2016 14:54:08 +0000 (16:54 +0200)]
dmaengine: at_xdmac: align descriptors on 64 bits
commit
4a9723e8df68cfce4048517ee32e37f78854b6fb upstream.
Having descriptors aligned on 64 bits allows update CNDA and CUBC in an
atomic way.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes:
e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Sun, 12 Jun 2016 10:31:53 +0000 (12:31 +0200)]
x86/quirks: Add early quirk to reset Apple AirPort card
commit
abb2bafd295fe962bbadc329dbfb2146457283ac upstream.
The EFI firmware on Macs contains a full-fledged network stack for
downloading OS X images from osrecovery.apple.com. Unfortunately
on Macs introduced 2011 and 2012, EFI brings up the Broadcom 4331
wireless card on every boot and leaves it enabled even after
ExitBootServices has been called. The card continues to assert its IRQ
line, causing spurious interrupts if the IRQ is shared. It also corrupts
memory by DMAing received packets, allowing for remote code execution
over the air. This only stops when a driver is loaded for the wireless
card, which may be never if the driver is not installed or blacklisted.
The issue seems to be constrained to the Broadcom 4331. Chris Milsted
has verified that the newer Broadcom 4360 built into the MacBookPro11,3
(2013/2014) does not exhibit this behaviour. The chances that Apple will
ever supply a firmware fix for the older machines appear to be zero.
The solution is to reset the card on boot by writing to a reset bit in
its mmio space. This must be done as an early quirk and not as a plain
vanilla PCI quirk to successfully combat memory corruption by DMAed
packets: Matthew Garrett found out in 2012 that the packets are written
to EfiBootServicesData memory (http://mjg59.dreamwidth.org/11235.html).
This type of memory is made available to the page allocator by
efi_free_boot_services(). Plain vanilla PCI quirks run much later, in
subsys initcall level. In-between a time window would be open for memory
corruption. Random crashes occurring in this time window and attributed
to DMAed packets have indeed been observed in the wild by Chris
Bainbridge.
When Matthew Garrett analyzed the memory corruption issue in 2012, he
sought to fix it with a grub quirk which transitions the card to D3hot:
http://git.savannah.gnu.org/cgit/grub.git/commit/?id=
9d34bb85da56
This approach does not help users with other bootloaders and while it
may prevent DMAed packets, it does not cure the spurious interrupts
emanating from the card. Unfortunately the card's mmio space is
inaccessible in D3hot, so to reset it, we have to undo the effect of
Matthew's grub patch and transition the card back to D0.
Note that the quirk takes a few shortcuts to reduce the amount of code:
The size of BAR 0 and the location of the PM capability is identical
on all affected machines and therefore hardcoded. Only the address of
BAR 0 differs between models. Also, it is assumed that the BCMA core
currently mapped is the 802.11 core. The EFI driver seems to always take
care of this.
Michael Büsch, Bjorn Helgaas and Matt Fleming contributed feedback
towards finding the best solution to this problem.
The following should be a comprehensive list of affected models:
iMac13,1 2012 21.5" [Root Port 00:1c.3 = 8086:1e16]
iMac13,2 2012 27" [Root Port 00:1c.3 = 8086:1e16]
Macmini5,1 2011 i5 2.3 GHz [Root Port 00:1c.1 = 8086:1c12]
Macmini5,2 2011 i5 2.5 GHz [Root Port 00:1c.1 = 8086:1c12]
Macmini5,3 2011 i7 2.0 GHz [Root Port 00:1c.1 = 8086:1c12]
Macmini6,1 2012 i5 2.5 GHz [Root Port 00:1c.1 = 8086:1e12]
Macmini6,2 2012 i7 2.3 GHz [Root Port 00:1c.1 = 8086:1e12]
MacBookPro8,1 2011 13" [Root Port 00:1c.1 = 8086:1c12]
MacBookPro8,2 2011 15" [Root Port 00:1c.1 = 8086:1c12]
MacBookPro8,3 2011 17" [Root Port 00:1c.1 = 8086:1c12]
MacBookPro9,1 2012 15" [Root Port 00:1c.1 = 8086:1e12]
MacBookPro9,2 2012 13" [Root Port 00:1c.1 = 8086:1e12]
MacBookPro10,1 2012 15" [Root Port 00:1c.1 = 8086:1e12]
MacBookPro10,2 2012 13" [Root Port 00:1c.1 = 8086:1e12]
For posterity, spurious interrupts caused by the Broadcom 4331 wireless
card resulted in splats like this (stacktrace omitted):
irq 17: nobody cared (try booting with the "irqpoll" option)
handlers:
[<
ffffffff81374370>] pcie_isr
[<
ffffffffc0704550>] sdhci_irq [sdhci] threaded [<
ffffffffc07013c0>] sdhci_thread_irq [sdhci]
[<
ffffffffc0a0b960>] azx_interrupt [snd_hda_codec]
Disabling IRQ #17
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=79301
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=111781
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=728916
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=895951#c16
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=
1009819
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=
1098621
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=
1149632#c5
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=
1279130
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=
1332732
Tested-by: Konstantin Simanov <k.simanov@stlk.ru> # [MacBookPro8,1]
Tested-by: Lukas Wunner <lukas@wunner.de> # [MacBookPro9,1]
Tested-by: Bryan Paradis <bryan.paradis@gmail.com> # [MacBookPro9,2]
Tested-by: Andrew Worsley <amworsley@gmail.com> # [MacBookPro10,1]
Tested-by: Chris Bainbridge <chris.bainbridge@gmail.com> # [MacBookPro10,2]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Chris Milsted <cmilsted@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Michael Buesch <m@bues.ch>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: b43-dev@lists.infradead.org
Cc: linux-pci@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Link: http://lkml.kernel.org/r/48d0972ac82a53d460e5fce77a07b2560db95203.1465690253.git.lukas@wunner.de
[ Did minor readability edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Sun, 12 Jun 2016 10:31:53 +0000 (12:31 +0200)]
x86/quirks: Reintroduce scanning of secondary buses
commit
850c321027c2e31d0afc71588974719a4b565550 upstream.
We used to scan secondary buses until the following commit that
was applied in 2009:
8659c406ade3 ("x86: only scan the root bus in early PCI quirks")
which commit constrained early quirks to the root bus only. Its
motivation was to prevent application of the nvidia_bugs quirk
on secondary buses.
We're about to add a quirk to reset the Broadcom 4331 wireless card on
2011/2012 Macs, which is located on a secondary bus behind a PCIe root
port. To facilitate that, reintroduce scanning of secondary buses.
The commit message of
8659c406ade3 notes that scanning only the root bus
"saves quite some unnecessary scanning work". The algorithm used prior
to
8659c406ade3 was particularly time consuming because it scanned
buses 0 to 31 brute force. To avoid lengthening boot time, employ a
recursive strategy which only scans buses that are actually reachable
from the root bus.
Yinghai Lu pointed out that the secondary bus number read from a
bridge's config space may be invalid, in particular a value of 0 would
cause an infinite loop. The PCI core goes beyond that and recurses to a
child bus only if its bus number is greater than the parent bus number
(see pci_scan_bridge()). Since the root bus is numbered 0, this implies
that secondary buses may not be 0. Do the same on early scanning.
If this algorithm is found to significantly impact boot time or cause
infinite loops on broken hardware, it would be possible to limit its
recursion depth: The Broadcom 4331 quirk applies at depth 1, all others
at depth 0, so the bus need not be scanned deeper than that for now. An
alternative approach would be to revert to scanning only the root bus,
and apply the Broadcom 4331 quirk to the root ports 8086:1c12, 8086:1e12
and 8086:1e16. Apple always positioned the card behind either of these
three ports. The quirk would then check presence of the card in slot 0
below the root port and do its deed.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-pci@vger.kernel.org
Link: http://lkml.kernel.org/r/f0daa70dac1a9b2483abdb31887173eb6ab77bdf.1465690253.git.lukas@wunner.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Sun, 12 Jun 2016 10:31:53 +0000 (12:31 +0200)]
x86/quirks: Apply nvidia_bugs quirk only on root bus
commit
447d29d1d3aed839e74c2401ef63387780ac51ed upstream.
Since the following commit:
8659c406ade3 ("x86: only scan the root bus in early PCI quirks")
... early quirks are only applied to devices on the root bus.
The motivation was to prevent application of the nvidia_bugs quirk on
secondary buses.
We're about to reintroduce scanning of secondary buses for a quirk to
reset the Broadcom 4331 wireless card on 2011/2012 Macs. To prevent
regressions, open code the requirement to apply nvidia_bugs only on the
root bus.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/4d5477c1d76b2f0387a780f2142bbcdd9fee869b.1465690253.git.lukas@wunner.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michał Pecio [Tue, 7 Jun 2016 10:34:45 +0000 (12:34 +0200)]
USB: OHCI: Don't mark EDs as ED_OPER if scheduling fails
commit
c66f59ee5050447b3da92d36f5385a847990a894 upstream.
Since ed_schedule begins with marking the ED as "operational",
the ED may be left in such state even if scheduling actually
fails.
This allows future submission attempts to smuggle this ED to the
hardware behind the scheduler's back and without linking it to
the ohci->eds_in_use list.
The former causes bandwidth saturation and data loss on isoc
endpoints, the latter crashes the kernel when attempt is made
to unlink such ED from this list.
Fix ed_schedule to update ED state only on successful return.
Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arnaldo Carvalho de Melo [Mon, 14 Mar 2016 12:56:35 +0000 (09:56 -0300)]
UPSTREAM: net: Fix use after free in the recvmmsg exit path
(cherry picked from commit
34b88a68f26a75e4fded796f1a49c40f82234b7d)
The syzkaller fuzzer hit the following use-after-free:
Call Trace:
[<
ffffffff8175ea0e>] __asan_report_load8_noabort+0x3e/0x40 mm/kasan/report.c:295
[<
ffffffff851cc31a>] __sys_recvmmsg+0x6fa/0x7f0 net/socket.c:2261
[< inline >] SYSC_recvmmsg net/socket.c:2281
[<
ffffffff851cc57f>] SyS_recvmmsg+0x16f/0x180 net/socket.c:2270
[<
ffffffff86332bb6>] entry_SYSCALL_64_fastpath+0x16/0x7a
arch/x86/entry/entry_64.S:185
And, as Dmitry rightly assessed, that is because we can drop the
reference and then touch it when the underlying recvmsg calls return
some packets and then hit an error, which will make recvmmsg to set
sock->sk->sk_err, oops, fix it.
Reported-and-Tested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Fixes:
a2e2725541fa ("net: Introduce recvmmsg socket syscall")
http://lkml.kernel.org/r/
20160122211644.GC2470@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Change-Id: I2adb0faf595b7b634d9b739dfdd1a47109e20ecb
Bug:
30515201
James Carr [Sat, 30 Jul 2016 02:02:16 +0000 (19:02 -0700)]
Implement memory_state_time, used by qcom,cpubw
New driver memory_state_time tracks time spent in different DDR
frequency and bandwidth states.
Memory drivers such as qcom,cpubw can post updated state to the driver
after registering a callback. Processed by a workqueue
Bandwidth buckets are read in from device tree in the relevant qualcomm
section, can be defined in any quantity and spacing.
The data is exposed at /sys/kernel/memory_state_time, able to be read by
the Android framework.
Functionality is behind a config option CONFIG_MEMORY_STATE_TIME
Change-Id: I4fee165571cb975fb9eacbc9aada5e6d7dd748f0
Signed-off-by: James Carr <carrja@google.com>
Dmitry Shmidt [Mon, 1 Aug 2016 22:51:01 +0000 (15:51 -0700)]
Merge tag 'v4.4.16' into android-4.4.y
This is the 4.4.16 stable release
Change-Id: Ibaf7b7e03695e1acebc654a2ca1a4bfcc48fcea4
Amit Pundir [Sun, 31 Jul 2016 11:37:46 +0000 (17:07 +0530)]
Revert "panic: Add board ID to panic output"
This reverts commit
4e09c510185cb4db2277ce81cce81b7aa06bea45.
I checked for the usage of this debug helper in AOSP common kernels as
well as vendor kernels (e.g exynos, msm, mediatek, omap, tegra, x86,
x86_64) hosted at https://android.googlesource.com/kernel/ and I found
out that other than few fairly obsolete Omap trees (for tuna & Glass)
and Exynos tree (for Manta), there is no active user of this debug
helper. So we can safely remove this helper code.
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Anson Jacob [Mon, 1 Aug 2016 02:30:14 +0000 (22:30 -0400)]
usb: gadget: f_accessory: remove duplicate endpoint alloc
usb_ep_autoconfig is called twice for allocating
bulk out endpoint.
Removed the unwanted call.
Fixes Issue: 67180
Change-Id: I03e87a86fbbbc85831ff7f0496adf038d1de2956
Signed-off-by: Anson Jacob <ansonjacob.aj@gmail.com>
Arend Van Spriel [Fri, 15 Jul 2016 10:39:13 +0000 (12:39 +0200)]
BACKPORT: brcmfmac: defer DPC processing during probe
The sdio dpc starts processing when in SDIOD_STATE_DATA. This state was
entered right after firmware download. This patch moves that transition
just before enabling sdio interrupt handling thus avoiding watchdog
expiry which would put the bus to sleep while probing.
Change-Id: I09c60752374b8145da78000935062be08c5c8a52
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
Greg Kroah-Hartman [Wed, 27 Jul 2016 16:48:30 +0000 (09:48 -0700)]
Linux 4.4.16
Miklos Szeredi [Mon, 21 Mar 2016 16:31:44 +0000 (17:31 +0100)]
ovl: verify upper dentry before unlink and rename
commit
11f3710417d026ea2f4fcf362d866342c5274185 upstream.
Unlink and rename in overlayfs checked the upper dentry for staleness by
verifying upper->d_parent against upperdir. However the dentry can go
stale also by being unhashed, for example.
Expand the verification to actually look up the name again (under parent
lock) and check if it matches the upper dentry. This matches what the VFS
does before passing the dentry to filesytem's unlink/rename methods, which
excludes any inconsistency caused by overlayfs.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>