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5 years agonet: Don't copy pfmemalloc flag in __copy_skb_header()
Stefano Brivio [Wed, 11 Jul 2018 12:39:42 +0000 (14:39 +0200)]
net: Don't copy pfmemalloc flag in __copy_skb_header()

The pfmemalloc flag indicates that the skb was allocated from
the PFMEMALLOC reserves, and the flag is currently copied on skb
copy and clone.

However, an skb copied from an skb flagged with pfmemalloc
wasn't necessarily allocated from PFMEMALLOC reserves, and on
the other hand an skb allocated that way might be copied from an
skb that wasn't.

So we should not copy the flag on skb copy, and rather decide
whether to allow an skb to be associated with sockets unrelated
to page reclaim depending only on how it was allocated.

Move the pfmemalloc flag before headers_start[0] using an
existing 1-bit hole, so that __copy_skb_header() doesn't copy
it.

When cloning, we'll now take care of this flag explicitly,
contravening to the warning comment of __skb_clone().

While at it, restore the newline usage introduced by commit
b19372273164 ("net: reorganize sk_buff for faster
__copy_skb_header()") to visually separate bytes used in
bitfields after headers_start[0], that was gone after commit
a9e419dc7be6 ("netfilter: merge ctinfo into nfct pointer storage
area"), and describe the pfmemalloc flag in the kernel-doc
structure comment.

This doesn't change the size of sk_buff or cacheline boundaries,
but consolidates the 15 bits hole before tc_index into a 2 bytes
hole before csum, that could now be filled more easily.

Reported-by: Patrick Talbert <ptalbert@redhat.com>
Fixes: c93bdd0e03e8 ("netvm: allow skb allocation to use PFMEMALLOC reserves")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'sfc-filter-locking-fixes'
David S. Miller [Thu, 12 Jul 2018 21:52:04 +0000 (14:52 -0700)]
Merge branch 'sfc-filter-locking-fixes'

Bert Kenward says:

====================
sfc: filter locking fixes

Two fixes for sfc ef10 filter table locking. Initially spotted
by lockdep, but one issue has also been seen in normal use.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosfc: hold filter_sem consistently during reset
Bert Kenward [Wed, 11 Jul 2018 10:45:10 +0000 (11:45 +0100)]
sfc: hold filter_sem consistently during reset

We should take and release the filter_sem consistently during the
reset process, in the same manner as the mac_lock and reset_lock.

For lockdep consistency we also take the filter_sem for write around
other calls to efx->type->init().

Fixes: c2bebe37c6b6 ("sfc: give ef10 its own rwsem in the filter table instead of filter_lock")
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosfc: avoid hang from nested use of the filter_sem
Bert Kenward [Wed, 11 Jul 2018 10:44:25 +0000 (11:44 +0100)]
sfc: avoid hang from nested use of the filter_sem

In some situations we may end up calling down_read while already
holding the semaphore for write, thus hanging. This has been seen
when setting the MAC address for the interface. The hung task log
in this situation includes this stack:
  down_read
  efx_ef10_filter_insert
  efx_ef10_filter_insert_addr_list
  efx_ef10_filter_vlan_sync_rx_mode
  efx_ef10_filter_add_vlan
  efx_ef10_filter_table_probe
  efx_ef10_set_mac_address
  efx_set_mac_address
  dev_set_mac_address

In addition, lockdep rightly points out that nested calling of
down_read is incorrect.

Fixes: c2bebe37c6b6 ("sfc: give ef10 its own rwsem in the filter table instead of filter_lock")
Tested-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: systemport: Fix CRC forwarding check for SYSTEMPORT Lite
Florian Fainelli [Wed, 11 Jul 2018 09:47:58 +0000 (02:47 -0700)]
net: systemport: Fix CRC forwarding check for SYSTEMPORT Lite

SYSTEMPORT Lite reversed the logic compared to SYSTEMPORT, the
GIB_FCS_STRIP bit is set when the Ethernet FCS is stripped, and that bit
is not set by default. Fix the logic such that we properly check whether
that bit is set or not and we don't forward an extra 4 bytes to the
network stack.

Fixes: 44a4524c54af ("net: systemport: Add support for SYSTEMPORT Lite")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotcp: allow user to create repair socket without window probes
Stefan Baranoff [Tue, 10 Jul 2018 21:31:10 +0000 (17:31 -0400)]
tcp: allow user to create repair socket without window probes

Under rare conditions where repair code may be used it is possible that
window probes are either unnecessary or undesired. If the user knows that
window probes are not wanted or needed this change allows them to skip
sending them when a socket comes out of repair.

Signed-off-by: Stefan Baranoff <sbaranoff@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotcp: fix sequence numbers for repaired sockets re-using TIME-WAIT sockets
Stefan Baranoff [Tue, 10 Jul 2018 21:25:20 +0000 (17:25 -0400)]
tcp: fix sequence numbers for repaired sockets re-using TIME-WAIT sockets

This patch fixes a bug where the sequence numbers of a socket created using
TCP repair functionality are lower than set after connect is called.
This occurs when the repair socket overlaps with a TIME-WAIT socket and
triggers the re-use code. The amount lower is equal to the number of times
that a particular IP/port set is re-used and then put back into TIME-WAIT.
Re-using the first time the sequence number is 1 lower, closing that socket
and then re-opening (with repair) a new socket with the same addresses/ports
puts the sequence number 2 lower than set via setsockopt. The third time is
3 lower, etc. I have not tested what the limit of this acrewal is, if any.

The fix is, if a socket is in repair mode, to respect the already set
sequence number and timestamp when it would have already re-used the
TIME-WAIT socket.

Signed-off-by: Stefan Baranoff <sbaranoff@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosch_fq_codel: zero q->flows_cnt when fq_codel_init fails
Jacob Keller [Tue, 10 Jul 2018 21:22:27 +0000 (14:22 -0700)]
sch_fq_codel: zero q->flows_cnt when fq_codel_init fails

When fq_codel_init fails, qdisc_create_dflt will cleanup by using
qdisc_destroy. This function calls the ->reset() op prior to calling the
->destroy() op.

Unfortunately, during the failure flow for sch_fq_codel, the ->flows
parameter is not initialized, so the fq_codel_reset function will null
pointer dereference.

   kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
   kernel: IP: fq_codel_reset+0x58/0xd0 [sch_fq_codel]
   kernel: PGD 0 P4D 0
   kernel: Oops: 0000 [#1] SMP PTI
   kernel: Modules linked in: i40iw i40e(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack tun bridge stp llc devlink ebtable_filter ebtables ip6table_filter ip6_tables rpcrdma ib_isert iscsi_target_mod sunrpc ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm intel_rapl sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate iTCO_wdt iTCO_vendor_support intel_uncore ib_core intel_rapl_perf mei_me mei joydev i2c_i801 lpc_ich ioatdma shpchp wmi sch_fq_codel xfs libcrc32c mgag200 ixgbe drm_kms_helper isci ttm firewire_ohci
   kernel:  mdio drm igb libsas crc32c_intel firewire_core ptp pps_core scsi_transport_sas crc_itu_t dca i2c_algo_bit ipmi_si ipmi_devintf ipmi_msghandler [last unloaded: i40e]
   kernel: CPU: 10 PID: 4219 Comm: ip Tainted: G           OE    4.16.13custom-fq-codel-test+ #3
   kernel: Hardware name: Intel Corporation S2600CO/S2600CO, BIOS SE5C600.86B.02.05.0004.051120151007 05/11/2015
   kernel: RIP: 0010:fq_codel_reset+0x58/0xd0 [sch_fq_codel]
   kernel: RSP: 0018:ffffbfbf4c1fb620 EFLAGS: 00010246
   kernel: RAX: 0000000000000400 RBX: 0000000000000000 RCX: 00000000000005b9
   kernel: RDX: 0000000000000000 RSI: ffff9d03264a60c0 RDI: ffff9cfd17b31c00
   kernel: RBP: 0000000000000001 R08: 00000000000260c0 R09: ffffffffb679c3e9
   kernel: R10: fffff1dab06a0e80 R11: ffff9cfd163af800 R12: ffff9cfd17b31c00
   kernel: R13: 0000000000000001 R14: ffff9cfd153de600 R15: 0000000000000001
   kernel: FS:  00007fdec2f92800(0000) GS:ffff9d0326480000(0000) knlGS:0000000000000000
   kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   kernel: CR2: 0000000000000008 CR3: 0000000c1956a006 CR4: 00000000000606e0
   kernel: Call Trace:
   kernel:  qdisc_destroy+0x56/0x140
   kernel:  qdisc_create_dflt+0x8b/0xb0
   kernel:  mq_init+0xc1/0xf0
   kernel:  qdisc_create_dflt+0x5a/0xb0
   kernel:  dev_activate+0x205/0x230
   kernel:  __dev_open+0xf5/0x160
   kernel:  __dev_change_flags+0x1a3/0x210
   kernel:  dev_change_flags+0x21/0x60
   kernel:  do_setlink+0x660/0xdf0
   kernel:  ? down_trylock+0x25/0x30
   kernel:  ? xfs_buf_trylock+0x1a/0xd0 [xfs]
   kernel:  ? rtnl_newlink+0x816/0x990
   kernel:  ? _xfs_buf_find+0x327/0x580 [xfs]
   kernel:  ? _cond_resched+0x15/0x30
   kernel:  ? kmem_cache_alloc+0x20/0x1b0
   kernel:  ? rtnetlink_rcv_msg+0x200/0x2f0
   kernel:  ? rtnl_calcit.isra.30+0x100/0x100
   kernel:  ? netlink_rcv_skb+0x4c/0x120
   kernel:  ? netlink_unicast+0x19e/0x260
   kernel:  ? netlink_sendmsg+0x1ff/0x3c0
   kernel:  ? sock_sendmsg+0x36/0x40
   kernel:  ? ___sys_sendmsg+0x295/0x2f0
   kernel:  ? ebitmap_cmp+0x6d/0x90
   kernel:  ? dev_get_by_name_rcu+0x73/0x90
   kernel:  ? skb_dequeue+0x52/0x60
   kernel:  ? __inode_wait_for_writeback+0x7f/0xf0
   kernel:  ? bit_waitqueue+0x30/0x30
   kernel:  ? fsnotify_grab_connector+0x3c/0x60
   kernel:  ? __sys_sendmsg+0x51/0x90
   kernel:  ? do_syscall_64+0x74/0x180
   kernel:  ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2
   kernel: Code: 00 00 48 89 87 00 02 00 00 8b 87 a0 01 00 00 85 c0 0f 84 84 00 00 00 31 ed 48 63 dd 83 c5 01 48 c1 e3 06 49 03 9c 24 90 01 00 00 <48> 8b 73 08 48 8b 3b e8 6c 9a 4f f6 48 8d 43 10 48 c7 03 00 00
   kernel: RIP: fq_codel_reset+0x58/0xd0 [sch_fq_codel] RSP: ffffbfbf4c1fb620
   kernel: CR2: 0000000000000008
   kernel: ---[ end trace e81a62bede66274e ]---

This is caused because flows_cnt is non-zero, but flows hasn't been
initialized. fq_codel_init has left the private data in a partially
initialized state.

To fix this, reset flows_cnt to 0 when we fail to initialize.
Additionally, to make the state more consistent, also cleanup the flows
pointer when the allocation of backlogs fails.

This fixes the NULL pointer dereference, since both the for-loop and
memset in fq_codel_reset will be no-ops when flow_cnt is zero.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Thu, 12 Jul 2018 17:27:11 +0000 (10:27 -0700)]
Merge branch '10GbE' of git://git./linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2018-07-12

This series contains updates to ixgbe and e100/e1000 kernel documentation.

Alex fixes ixgbe to ensure that we are more explicit about the ordering
of updates to the receive address register (RAR) table.

Dan Carpenter fixes an issue where we were reading one element beyond
the end of the array.

Mauro Carvalho Chehab fixes formatting issues in the e100.rst and
e1000.rst that were causing errors during 'make htmldocs'.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetworking: e1000.rst: Get rid of Sphinx warnings
Mauro Carvalho Chehab [Tue, 26 Jun 2018 09:49:10 +0000 (06:49 -0300)]
networking: e1000.rst: Get rid of Sphinx warnings

Documentation/networking/e1000.rst:83: ERROR: Unexpected indentation.
    Documentation/networking/e1000.rst:84: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/networking/e1000.rst:173: WARNING: Definition list ends without a blank line; unexpected unindent.
    Documentation/networking/e1000.rst:236: WARNING: Definition list ends without a blank line; unexpected unindent.

While here, fix highlights and mark a table as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agonetworking: e100.rst: Get rid of Sphinx warnings
Mauro Carvalho Chehab [Tue, 26 Jun 2018 09:49:09 +0000 (06:49 -0300)]
networking: e100.rst: Get rid of Sphinx warnings

Documentation/networking/e100.rst:57: WARNING: Literal block expected; none found.
    Documentation/networking/e100.rst:68: WARNING: Literal block expected; none found.
    Documentation/networking/e100.rst:75: WARNING: Literal block expected; none found.
    Documentation/networking/e100.rst:84: WARNING: Literal block expected; none found.
    Documentation/networking/e100.rst:93: WARNING: Inline emphasis start-string without end-string.

While here, fix some highlights.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoixgbe: Off by one in ixgbe_ipsec_tx()
Dan Carpenter [Wed, 4 Jul 2018 09:53:37 +0000 (12:53 +0300)]
ixgbe: Off by one in ixgbe_ipsec_tx()

The ipsec->tx_tbl[] has IXGBE_IPSEC_MAX_SA_COUNT elements so the > needs
to be changed to >= so we don't read one element beyond the end of the
array.

Fixes: 592594704761 ("ixgbe: process the Tx ipsec offload")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoixgbe: Be more careful when modifying MAC filters
Alexander Duyck [Mon, 18 Jun 2018 16:02:00 +0000 (12:02 -0400)]
ixgbe: Be more careful when modifying MAC filters

This change makes it so that we are much more explicit about the ordering
of updates to the receive address register (RAR) table. Prior to this patch
I believe we may have been updating the table while entries were still
active, or possibly allowing for reordering of things since we weren't
explicitly flushing writes to either the lower or upper portion of the
register prior to accessing the other half.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoMerge branch 'ieee802154-for-davem-2018-07-11' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Thu, 12 Jul 2018 07:19:06 +0000 (00:19 -0700)]
Merge branch 'ieee802154-for-davem-2018-07-11' of git://git./linux/kernel/git/sschmidt/wpan

Stefan Schmidt says:

====================
pull-request: ieee802154 for net 2018-07-11

An update from ieee802154 for your *net* tree.

Build system fix for a missing include from Arnd Bergmann.
Setting the IFLA_LINK for the lowpan parent from Lubomir Rintel.
Fixes for some RX corner cases in adf7242 driver by Michael Hennerich.
And some small patches to cleanup our BUG_ON vs WARN_ON usage.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoqed: fix spelling mistake "successffuly" -> "successfully"
Ewan D. Milne [Tue, 10 Jul 2018 14:27:24 +0000 (10:27 -0400)]
qed: fix spelling mistake "successffuly" -> "successfully"

Trivial fix to spelling mistake in qed_probe message.

Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosfp: fix module initialisation with netdev already up
Russell King [Tue, 10 Jul 2018 11:05:36 +0000 (12:05 +0100)]
sfp: fix module initialisation with netdev already up

It was been observed that with a particular order of initialisation,
the netdev can be up, but the SFP module still has its TX_DISABLE
signal asserted.  This occurs when the network device brought up before
the SFP kernel module has been inserted by userspace.

This occurs because sfp-bus layer does not hear about the change in
network device state, and so assumes that it is still down.  Set
netdev->sfp when the upstream is registered to work around this problem.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosfp: ensure we clean up properly on bus registration failure
Russell King [Tue, 10 Jul 2018 11:05:31 +0000 (12:05 +0100)]
sfp: ensure we clean up properly on bus registration failure

We fail to correctly clean up after a bus registration failure, which
can lead to an incorrect assumption about the registration state of
the upstream or sfp cage.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: add restart routine in rhashtable_free_and_destroy()
Taehee Yoo [Sun, 8 Jul 2018 02:55:51 +0000 (11:55 +0900)]
rhashtable: add restart routine in rhashtable_free_and_destroy()

rhashtable_free_and_destroy() cancels re-hash deferred work
then walks and destroys elements. at this moment, some elements can be
still in future_tbl. that elements are not destroyed.

test case:
nft_rhash_destroy() calls rhashtable_free_and_destroy() to destroy
all elements of sets before destroying sets and chains.
But rhashtable_free_and_destroy() doesn't destroy elements of future_tbl.
so that splat occurred.

test script:
   %cat test.nft
   table ip aa {
   map map1 {
   type ipv4_addr : verdict;
   elements = {
   0 : jump a0,
   1 : jump a0,
   2 : jump a0,
   3 : jump a0,
   4 : jump a0,
   5 : jump a0,
   6 : jump a0,
   7 : jump a0,
   8 : jump a0,
   9 : jump a0,
}
   }
   chain a0 {
   }
   }
   flush ruleset
   table ip aa {
   map map1 {
   type ipv4_addr : verdict;
   elements = {
   0 : jump a0,
   1 : jump a0,
   2 : jump a0,
   3 : jump a0,
   4 : jump a0,
   5 : jump a0,
   6 : jump a0,
   7 : jump a0,
   8 : jump a0,
   9 : jump a0,
   }
   }
   chain a0 {
   }
   }
   flush ruleset

   %while :; do nft -f test.nft; done

Splat looks like:
[  200.795603] kernel BUG at net/netfilter/nf_tables_api.c:1363!
[  200.806944] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI
[  200.812253] CPU: 1 PID: 1582 Comm: nft Not tainted 4.17.0+ #24
[  200.820297] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 07/08/2015
[  200.830309] RIP: 0010:nf_tables_chain_destroy.isra.34+0x62/0x240 [nf_tables]
[  200.838317] Code: 43 50 85 c0 74 26 48 8b 45 00 48 8b 4d 08 ba 54 05 00 00 48 c7 c6 60 6d 29 c0 48 c7 c7 c0 65 29 c0 4c 8b 40 08 e8 58 e5 fd f8 <0f> 0b 48 89 da 48 b8 00 00 00 00 00 fc ff
[  200.860366] RSP: 0000:ffff880118dbf4d0 EFLAGS: 00010282
[  200.866354] RAX: 0000000000000061 RBX: ffff88010cdeaf08 RCX: 0000000000000000
[  200.874355] RDX: 0000000000000061 RSI: 0000000000000008 RDI: ffffed00231b7e90
[  200.882361] RBP: ffff880118dbf4e8 R08: ffffed002373bcfb R09: ffffed002373bcfa
[  200.890354] R10: 0000000000000000 R11: ffffed002373bcfb R12: dead000000000200
[  200.898356] R13: dead000000000100 R14: ffffffffbb62af38 R15: dffffc0000000000
[  200.906354] FS:  00007fefc31fd700(0000) GS:ffff88011b800000(0000) knlGS:0000000000000000
[  200.915533] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  200.922355] CR2: 0000557f1c8e9128 CR3: 0000000106880000 CR4: 00000000001006e0
[  200.930353] Call Trace:
[  200.932351]  ? nf_tables_commit+0x26f6/0x2c60 [nf_tables]
[  200.939525]  ? nf_tables_setelem_notify.constprop.49+0x1a0/0x1a0 [nf_tables]
[  200.947525]  ? nf_tables_delchain+0x6e0/0x6e0 [nf_tables]
[  200.952383]  ? nft_add_set_elem+0x1700/0x1700 [nf_tables]
[  200.959532]  ? nla_parse+0xab/0x230
[  200.963529]  ? nfnetlink_rcv_batch+0xd06/0x10d0 [nfnetlink]
[  200.968384]  ? nfnetlink_net_init+0x130/0x130 [nfnetlink]
[  200.975525]  ? debug_show_all_locks+0x290/0x290
[  200.980363]  ? debug_show_all_locks+0x290/0x290
[  200.986356]  ? sched_clock_cpu+0x132/0x170
[  200.990352]  ? find_held_lock+0x39/0x1b0
[  200.994355]  ? sched_clock_local+0x10d/0x130
[  200.999531]  ? memset+0x1f/0x40

V2:
 - free all tables requested by Herbert Xu

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'bnxt_en-Bug-fixes'
David S. Miller [Mon, 9 Jul 2018 23:27:15 +0000 (16:27 -0700)]
Merge branch 'bnxt_en-Bug-fixes'

Michael Chan says:

====================
bnxt_en: Bug fixes.

These are bug fixes in error code paths, TC Flower VLAN TCI flow
checking bug fix, proper filtering of Broadcast packets if IFF_BROADCAST
is not set, and a bug fix in bnxt_get_max_rings() to return 0 ring
parameters when the return value is -ENOMEM.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Fix for system hang if request_irq fails
Vikas Gupta [Mon, 9 Jul 2018 06:24:52 +0000 (02:24 -0400)]
bnxt_en: Fix for system hang if request_irq fails

Fix bug in the error code path when bnxt_request_irq() returns failure.
bnxt_disable_napi() should not be called in this error path because
NAPI has not been enabled yet.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Do not modify max IRQ count after RDMA driver requests/frees IRQs.
Michael Chan [Mon, 9 Jul 2018 06:24:51 +0000 (02:24 -0400)]
bnxt_en: Do not modify max IRQ count after RDMA driver requests/frees IRQs.

Calling bnxt_set_max_func_irqs() to modify the max IRQ count requested or
freed by the RDMA driver is flawed.  The max IRQ count is checked when
re-initializing the IRQ vectors and this can happen multiple times
during ifup or ethtool -L.  If the max IRQ is reduced and the RDMA
driver is operational, we may not initailize IRQs correctly.  This
problem shows up on VFs with very small number of MSIX.

There is no other logic that relies on the IRQ count excluding the ones
used by RDMA.  So we fix it by just removing the call to subtract or
add the IRQs used by RDMA.

Fixes: a588e4580a7e ("bnxt_en: Add interface to support RDMA driver.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Support clearing of the IFF_BROADCAST flag.
Michael Chan [Mon, 9 Jul 2018 06:24:50 +0000 (02:24 -0400)]
bnxt_en: Support clearing of the IFF_BROADCAST flag.

Currently, the driver assumes IFF_BROADCAST is always set and always sets
the broadcast filter.  Modify the code to set or clear the broadcast
filter according to the IFF_BROADCAST flag.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Always set output parameters in bnxt_get_max_rings().
Michael Chan [Mon, 9 Jul 2018 06:24:49 +0000 (02:24 -0400)]
bnxt_en: Always set output parameters in bnxt_get_max_rings().

The current code returns -ENOMEM and does not bother to set the output
parameters to 0 when no rings are available.  Some callers, such as
bnxt_get_channels() will display garbage ring numbers when that happens.
Fix it by always setting the output parameters.

Fixes: 6e6c5a57fbe1 ("bnxt_en: Modify bnxt_get_max_rings() to support shared or non shared rings.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Fix inconsistent BNXT_FLAG_AGG_RINGS logic.
Michael Chan [Mon, 9 Jul 2018 06:24:48 +0000 (02:24 -0400)]
bnxt_en: Fix inconsistent BNXT_FLAG_AGG_RINGS logic.

If there aren't enough RX rings available, the driver will attempt to
use a single RX ring without the aggregation ring.  If that also
fails, the BNXT_FLAG_AGG_RINGS flag is cleared but the other ring
parameters are not set consistently to reflect that.  If more RX
rings become available at the next open, the RX rings will be in
an inconsistent state and may crash when freeing the RX rings.

Fix it by restoring the BNXT_FLAG_AGG_RINGS if not enough RX rings are
available to run without aggregation rings.

Fixes: bdbd1eb59c56 ("bnxt_en: Handle no aggregation ring gracefully.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnxt_en: Fix the vlan_tci exact match check.
Venkat Duvvuru [Mon, 9 Jul 2018 06:24:47 +0000 (02:24 -0400)]
bnxt_en: Fix the vlan_tci exact match check.

It is possible that OVS may set don’t care for DEI/CFI bit in
vlan_tci mask. Hence, checking for vlan_tci exact match will endup
in a vlan flow rejection.

This patch fixes the problem by checking for vlan_pcp and vid
separately, instead of checking for the entire vlan_tci.

Fixes: e85a9be93cf1 (bnxt_en: do not allow wildcard matches for L2 flows)
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Mon, 9 Jul 2018 21:23:13 +0000 (14:23 -0700)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for your net tree:

1) Missing module autoloadfor icmp and icmpv6 x_tables matches,
   from Florian Westphal.

2) Possible non-linear access to TCP header from tproxy, from
   Mate Eckl.

3) Do not allow rbtree to be used for single elements, this patch
   moves all set backend into one single module since such thing
   can only happen if hashtable module is explicitly blacklisted,
   which should not ever be done.

4) Reject error and standard targets from nft_compat for sanity
   reasons, they are never used from there.

5) Don't crash on double hashsize module parameter, from Andrey
   Ryabinin.

6) Drop dst on skb before placing it in the fragmentation
   reassembly queue, from Florian Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetfilter: ipv6: nf_defrag: drop skb dst before queueing
Florian Westphal [Mon, 9 Jul 2018 11:43:38 +0000 (13:43 +0200)]
netfilter: ipv6: nf_defrag: drop skb dst before queueing

Eric Dumazet reports:
 Here is a reproducer of an annoying bug detected by syzkaller on our production kernel
 [..]
 ./b78305423 enable_conntrack
 Then :
 sleep 60
 dmesg | tail -10
 [  171.599093] unregister_netdevice: waiting for lo to become free. Usage count = 2
 [  181.631024] unregister_netdevice: waiting for lo to become free. Usage count = 2
 [  191.687076] unregister_netdevice: waiting for lo to become free. Usage count = 2
 [  201.703037] unregister_netdevice: waiting for lo to become free. Usage count = 2
 [  211.711072] unregister_netdevice: waiting for lo to become free. Usage count = 2
 [  221.959070] unregister_netdevice: waiting for lo to become free. Usage count = 2

Reproducer sends ipv6 fragment that hits nfct defrag via LOCAL_OUT hook.
skb gets queued until frag timer expiry -- 1 minute.

Normally nf_conntrack_reasm gets called during prerouting, so skb has
no dst yet which might explain why this wasn't spotted earlier.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: John Sperbeck <jsperbeck@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Tested-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: nf_conntrack: Fix possible possible crash on module loading.
Andrey Ryabinin [Fri, 6 Jul 2018 13:38:53 +0000 (16:38 +0300)]
netfilter: nf_conntrack: Fix possible possible crash on module loading.

Loading the nf_conntrack module with doubled hashsize parameter, i.e.
  modprobe nf_conntrack hashsize=12345 hashsize=12345
causes NULL-ptr deref.

If 'hashsize' specified twice, the nf_conntrack_set_hashsize() function
will be called also twice.
The first nf_conntrack_set_hashsize() call will set the
'nf_conntrack_htable_size' variable:

nf_conntrack_set_hashsize()
...
/* On boot, we can set this without any fancy locking. */
if (!nf_conntrack_htable_size)
return param_set_uint(val, kp);

But on the second invocation, the nf_conntrack_htable_size is already set,
so the nf_conntrack_set_hashsize() will take a different path and call
the nf_conntrack_hash_resize() function. Which will crash on the attempt
to dereference 'nf_conntrack_hash' pointer:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
RIP: 0010:nf_conntrack_hash_resize+0x255/0x490 [nf_conntrack]
Call Trace:
 nf_conntrack_set_hashsize+0xcd/0x100 [nf_conntrack]
 parse_args+0x1f9/0x5a0
 load_module+0x1281/0x1a50
 __se_sys_finit_module+0xbe/0xf0
 do_syscall_64+0x7c/0x390
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fix this, by checking !nf_conntrack_hash instead of
!nf_conntrack_htable_size. nf_conntrack_hash will be initialized only
after the module loaded, so the second invocation of the
nf_conntrack_set_hashsize() won't crash, it will just reinitialize
nf_conntrack_htable_size again.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: nft_compat: explicitly reject ERROR and standard target
Florian Westphal [Fri, 6 Jul 2018 18:06:05 +0000 (20:06 +0200)]
netfilter: nft_compat: explicitly reject ERROR and standard target

iptables-nft never requests these, but make this explicitly illegal.
If it were quested, kernel could oops as ->eval is NULL, furthermore,
the builtin targets have no owning module so its possible to rmmod
eb/ip/ip6_tables module even if they would be loaded.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonet: ieee802154: adf7242: Fix OCL calibration runs
Michael Hennerich [Mon, 25 Jun 2018 13:57:37 +0000 (16:57 +0300)]
net: ieee802154: adf7242: Fix OCL calibration runs

Reissuing RC_RX every 400ms - to adjust for offset drift in
receiver see datasheet page 61, OCL section.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agonet: ieee802154: adf7242: Fix erroneous RX enable
Michael Hennerich [Mon, 25 Jun 2018 13:49:51 +0000 (16:49 +0300)]
net: ieee802154: adf7242: Fix erroneous RX enable

Only enable RX mode if the netdev is opened.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agoieee802154: fakelb: switch from BUG_ON() to WARN_ON() on problem
Stefan Schmidt [Fri, 22 Sep 2017 12:14:05 +0000 (14:14 +0200)]
ieee802154: fakelb: switch from BUG_ON() to WARN_ON() on problem

The check is valid but it does not warrant to crash the kernel. A
WARN_ON() is good enough here.
Found by checkpatch.

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agoieee802154: at86rf230: use __func__ macro for debug messages
Stefan Schmidt [Fri, 22 Sep 2017 12:13:54 +0000 (14:13 +0200)]
ieee802154: at86rf230: use __func__ macro for debug messages

Instead of having the function name hard-coded (it might change and we
forgot to update them in the debug output) we can use __func__ instead
and also shorter the line so we do not need to break it. Also fix an
extra blank line while being here.
Found by checkpatch.

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agoieee802154: at86rf230: switch from BUG_ON() to WARN_ON() on problem
Stefan Schmidt [Fri, 22 Sep 2017 12:13:53 +0000 (14:13 +0200)]
ieee802154: at86rf230: switch from BUG_ON() to WARN_ON() on problem

The check is valid but it does not warrant to crash the kernel. A
WARN_ON() is good enough here.
Found by checkpatch.

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agotcp: cleanup copied_seq and urg_data in tcp_disconnect
Eric Dumazet [Sun, 8 Jul 2018 06:00:01 +0000 (23:00 -0700)]
tcp: cleanup copied_seq and urg_data in tcp_disconnect

tcp_zerocopy_receive() relies on tcp_inq() to limit number of bytes
requested by user.

syzbot found that after tcp_disconnect(), tcp_inq() was returning
a stale value (number of bytes in queue before the disconnect).

Note that after this patch, ioctl(fd, SIOCINQ, &val) is also fixed
and returns 0, so this might be a candidate for all known linux kernels.

While we are at this, we probably also should clear urg_data to
avoid other syzkaller reports after it discovers how to deal with
urgent data.

syzkaller repro :

socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3
bind(3, {sa_family=AF_INET, sin_port=htons(20000), sin_addr=inet_addr("224.0.0.1")}, 16) = 0
connect(3, {sa_family=AF_INET, sin_port=htons(20000), sin_addr=inet_addr("127.0.0.1")}, 16) = 0
send(3, ..., 4096, 0) = 4096
connect(3, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 128) = 0
getsockopt(3, SOL_TCP, TCP_ZEROCOPY_RECEIVE, ..., [16]) = 0 // CRASH

Fixes: 05255b823a61 ("tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Sun, 8 Jul 2018 04:06:55 +0000 (13:06 +0900)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Alexei Starovoitov says:

====================
pull-request: bpf 2018-07-07

The following pull-request contains BPF updates for your *net* tree.

Plenty of fixes for different components:

1) A set of critical fixes for sockmap and sockhash, from John Fastabend.

2) fixes for several race conditions in af_xdp, from Magnus Karlsson.

3) hash map refcnt fix, from Mauricio Vasquez.

4) samples/bpf fixes, from Taeung Song.

5) ifup+mtu check for xdp_redirect, from Toshiaki Makita.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoipfrag: really prevent allocation on netns exit
Paolo Abeni [Fri, 6 Jul 2018 10:30:20 +0000 (12:30 +0200)]
ipfrag: really prevent allocation on netns exit

Setting the low threshold to 0 has no effect on frags allocation,
we need to clear high_thresh instead.

The code was pre-existent to commit 648700f76b03 ("inet: frags:
use rhashtables for reassembly units"), but before the above,
such assignment had a different role: prevent concurrent eviction
from the worker and the netns cleanup helper.

Fixes: 648700f76b03 ("inet: frags: use rhashtables for reassembly units")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: diag: Don't double-free TCP_NEW_SYN_RECV sockets in tcp_abort
Lorenzo Colitti [Sat, 7 Jul 2018 07:31:40 +0000 (16:31 +0900)]
net: diag: Don't double-free TCP_NEW_SYN_RECV sockets in tcp_abort

When tcp_diag_destroy closes a TCP_NEW_SYN_RECV socket, it first
frees it by calling inet_csk_reqsk_queue_drop_and_and_put in
tcp_abort, and then frees it again by calling sock_gen_put.

Since tcp_abort only has one caller, and all the other codepaths
in tcp_abort don't free the socket, just remove the free in that
function.

Cc: David Ahern <dsa@cumulusnetworks.com>
Tested: passes Android sock_diag_test.py, which exercises this codepath
Fixes: d7226c7a4dd1 ("net: diag: Fix refcnt leak in error path destroying socket")
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/ipv4: Set oif in fib_compute_spec_dst
David Ahern [Sat, 7 Jul 2018 23:15:26 +0000 (16:15 -0700)]
net/ipv4: Set oif in fib_compute_spec_dst

Xin reported that icmp replies may not use the address on the device the
echo request is received if the destination address is broadcast. Instead
a route lookup is done without considering VRF context. Fix by setting
oif in flow struct to the master device if it is enslaved. That directs
the lookup to the VRF table. If the device is not enslaved, oif is still
0 so no affect.

Fixes: cd2fbe1b6b51 ("net: Use VRF device index for lookups on RX")
Reported-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoxdp: XDP_REDIRECT should check IFF_UP and MTU
Toshiaki Makita [Fri, 6 Jul 2018 02:49:00 +0000 (11:49 +0900)]
xdp: XDP_REDIRECT should check IFF_UP and MTU

Otherwise we end up with attempting to send packets from down devices
or to send oversized packets, which may cause unexpected driver/device
behaviour. Generic XDP has already done this check, so reuse the logic
in native XDP.

Fixes: 814abfabef3c ("xdp: add bpf_redirect helper function")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agoMerge branch 'sockhash-fixes'
Alexei Starovoitov [Sat, 7 Jul 2018 22:19:30 +0000 (15:19 -0700)]
Merge branch 'sockhash-fixes'

John Fastabend says:

====================
First three patches resolve issues found while testing sockhash and
reviewing code. Syzbot also found them about the same time as I was
working on fixes. The main issue is in the sockhash path we reduced
the scope of sk_callback lock but this meant we could get update and
close running in parallel so fix that here.

Then testing sk_msg and sk_skb programs together found that skb->dev
is not always assigned and some of the helpers were depending on this
to lookup max mtu. Fix this by using SKB_MAX_ALLOC when no MTU is
available.

Finally, Martin spotted that the sockmap code was still using the
qdisc skb cb structure. But I was sure we had fixed this long ago.
Looks like we missed it in a merge conflict resolution and then by
chance data_end offset was the same in both structures so everything
sort of continued to work even though it could break at any moment
if the structs ever change. So redo the conversion and this time
also convert the helpers.

v2: fix '0 files changed' issue in patches
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: sockmap, convert bpf_compute_data_pointers to bpf_*_sk_skb
John Fastabend [Thu, 5 Jul 2018 15:50:15 +0000 (08:50 -0700)]
bpf: sockmap, convert bpf_compute_data_pointers to bpf_*_sk_skb

In commit

  'bpf: bpf_compute_data uses incorrect cb structure' (8108a7751512)

we added the routine bpf_compute_data_end_sk_skb() to compute the
correct data_end values, but this has since been lost. In kernel
v4.14 this was correct and the above patch was applied in it
entirety. Then when v4.14 was merged into v4.15-rc1 net-next tree
we lost the piece that renamed bpf_compute_data_pointers to the
new function bpf_compute_data_end_sk_skb. This was done here,

e1ea2f9856b7 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net")

When it conflicted with the following rename patch,

6aaae2b6c433 ("bpf: rename bpf_compute_data_end into bpf_compute_data_pointers")

Finally, after a refactor I thought even the function
bpf_compute_data_end_sk_skb() was no longer needed and it was
erroneously removed.

However, we never reverted the sk_skb_convert_ctx_access() usage of
tcp_skb_cb which had been committed and survived the merge conflict.
Here we fix this by adding back the helper and *_data_end_sk_skb()
usage. Using the bpf_skc_data_end mapping is not correct because it
expects a qdisc_skb_cb object but at the sock layer this is not the
case. Even though it happens to work here because we don't overwrite
any data in-use at the socket layer and the cb structure is cleared
later this has potential to create some subtle issues. But, even
more concretely the filter.c access check uses tcp_skb_cb.

And by some act of chance though,

struct bpf_skb_data_end {
        struct qdisc_skb_cb        qdisc_cb;             /*     0    28 */

        /* XXX 4 bytes hole, try to pack */

        void *                     data_meta;            /*    32     8 */
        void *                     data_end;             /*    40     8 */

        /* size: 48, cachelines: 1, members: 3 */
        /* sum members: 44, holes: 1, sum holes: 4 */
        /* last cacheline: 48 bytes */
};

and then tcp_skb_cb,

struct tcp_skb_cb {
[...]
                struct {
                        __u32      flags;                /*    24     4 */
                        struct sock * sk_redir;          /*    32     8 */
                        void *     data_end;             /*    40     8 */
                } bpf;                                   /*          24 */
        };

So when we use offset_of() to track down the byte offset we get 40 in
either case and everything continues to work. Fix this mess and use
correct structures its unclear how long this might actually work for
until someone moves the structs around.

Reported-by: Martin KaFai Lau <kafai@fb.com>
Fixes: e1ea2f9856b7 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net")
Fixes: 6aaae2b6c433 ("bpf: rename bpf_compute_data_end into bpf_compute_data_pointers")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: sockmap, consume_skb in close path
John Fastabend [Thu, 5 Jul 2018 15:50:10 +0000 (08:50 -0700)]
bpf: sockmap, consume_skb in close path

Currently, when a sock is closed and the bpf_tcp_close() callback is
used we remove memory but do not free the skb. Call consume_skb() if
the skb is attached to the buffer.

Reported-by: syzbot+d464d2c20c717ef5a6a8@syzkaller.appspotmail.com
Fixes: 1aa12bdf1bfb ("bpf: sockmap, add sock close() hook to remove socks")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: sockhash, disallow bpf_tcp_close and update in parallel
John Fastabend [Thu, 5 Jul 2018 15:50:04 +0000 (08:50 -0700)]
bpf: sockhash, disallow bpf_tcp_close and update in parallel

After latest lock updates there is no longer anything preventing a
close and recvmsg call running in parallel. Additionally, we can
race update with close if we close a socket and simultaneously update
if via the BPF userspace API (note the cgroup ops are already run
with sock_lock held).

To resolve this take sock_lock in close and update paths.

Reported-by: syzbot+b680e42077a0d7c9a0c4@syzkaller.appspotmail.com
Fixes: e9db4ef6bf4c ("bpf: sockhash fix omitted bucket lock in sock_close")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: fix sk_skb programs without skb->dev assigned
John Fastabend [Thu, 5 Jul 2018 15:49:59 +0000 (08:49 -0700)]
bpf: fix sk_skb programs without skb->dev assigned

Multiple BPF helpers in use by sk_skb programs calculate the max
skb length using the __bpf_skb_max_len function. However, this
calculates the max length using the skb->dev pointer which can be
NULL when an sk_skb program is paired with an sk_msg program.

To force this a sk_msg program needs to redirect into the ingress
path of a sock with an attach sk_skb program. Then the the sk_skb
program would need to call one of the helpers that adjust the skb
size.

To fix the null ptr dereference use SKB_MAX_ALLOC size if no dev
is available.

Fixes: 8934ce2fd081 ("bpf: sockmap redirect ingress support")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agoMerge branch 'sockmap-fixes'
Alexei Starovoitov [Sat, 7 Jul 2018 22:16:58 +0000 (15:16 -0700)]
Merge branch 'sockmap-fixes'

John Fastabend says:

====================
I missed fixing the error path in the sockhash code to align with
supporting socks in multiple maps. Simply checking if the psock is
present does not mean we can decrement the reference count because
it could be part of another map. Fix this by cleaning up the error
path so this situation does not happen.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: sockmap, hash table is RCU so readers do not need locks
John Fastabend [Thu, 5 Jul 2018 15:06:01 +0000 (08:06 -0700)]
bpf: sockmap, hash table is RCU so readers do not need locks

This removes locking from readers of RCU hash table. Its not
necessary.

Fixes: 81110384441a ("bpf: sockmap, add hash map support")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agobpf: sockmap, error path can not release psock in multi-map case
John Fastabend [Thu, 5 Jul 2018 15:05:56 +0000 (08:05 -0700)]
bpf: sockmap, error path can not release psock in multi-map case

The current code, in the error path of sock_hash_ctx_update_elem,
checks if the sock has a psock in the user data and if so decrements
the reference count of the psock. However, if the error happens early
in the error path we may have never incremented the psock reference
count and if the psock exists because the sock is in another map then
we may inadvertently decrement the reference count.

Fix this by making the error path only call smap_release_sock if the
error happens after the increment.

Reported-by: syzbot+d464d2c20c717ef5a6a8@syzkaller.appspotmail.com
Fixes: 81110384441a ("bpf: sockmap, add hash map support")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
5 years agoMerge branch 'net-sched-fix-NULL-dereference-in-goto-chain-control-action'
David S. Miller [Sat, 7 Jul 2018 13:01:09 +0000 (22:01 +0900)]
Merge branch 'net-sched-fix-NULL-dereference-in-goto-chain-control-action'

Davide Caratti says:

====================
net/sched: fix NULL dereference in 'goto chain' control action

in a couple of TC actions (i.e. csum and tunnel_key), the control action
is stored together with the action-specific configuration data.
This avoids a race condition (see [1]), but it causes a crash when 'goto
chain' is used with the above actions. Since this race condition is
tolerated on the other TC actions (it's present even on actions where the
spinlock is still used), storing the control action in the common area
should be acceptable for tunnel_key and csum as well.

[1] https://www.spinics.net/lists/netdev/msg472047.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/sched: act_tunnel_key: fix NULL dereference when 'goto chain' is used
Davide Caratti [Fri, 6 Jul 2018 19:01:06 +0000 (21:01 +0200)]
net/sched: act_tunnel_key: fix NULL dereference when 'goto chain' is used

the control action in the common member of struct tcf_tunnel_key must be a
valid value, as it can contain the chain index when 'goto chain' is used.
Ensure that the control action can be read as x->tcfa_action, when x is a
pointer to struct tc_action and x->ops->type is TCA_ACT_TUNNEL_KEY, to
prevent the following command:

 # tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
 > $tcflags dst_mac $h2mac action tunnel_key unset goto chain 1

from causing a NULL dereference when a matching packet is received:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 PGD 80000001097ac067 P4D 80000001097ac067 PUD 103b0a067 PMD 0
 Oops: 0000 [#1] SMP PTI
 CPU: 0 PID: 3491 Comm: mausezahn Tainted: G            E     4.18.0-rc2.auguri+ #421
 Hardware name: Hewlett-Packard HP Z220 CMT Workstation/1790, BIOS K51 v01.58 02/07/2013
 RIP: 0010:tcf_action_exec+0xb8/0x100
 Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
 RSP: 0018:ffff95145ea03c40 EFLAGS: 00010246
 RAX: 0000000020000001 RBX: ffff9514499e5800 RCX: 0000000000000001
 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
 RBP: ffff95145ea03e60 R08: 0000000000000000 R09: ffff95145ea03c9c
 R10: ffff95145ea03c78 R11: 0000000000000008 R12: ffff951456a69800
 R13: ffff951456a69808 R14: 0000000000000001 R15: ffff95144965ee40
 FS:  00007fd67ee11740(0000) GS:ffff95145ea00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 00000001038a2006 CR4: 00000000001606f0
 Call Trace:
  <IRQ>
  fl_classify+0x1ad/0x1c0 [cls_flower]
  ? __update_load_avg_se.isra.47+0x1ca/0x1d0
  ? __update_load_avg_se.isra.47+0x1ca/0x1d0
  ? update_load_avg+0x665/0x690
  ? update_load_avg+0x665/0x690
  ? kmem_cache_alloc+0x38/0x1c0
  tcf_classify+0x89/0x140
  __netif_receive_skb_core+0x5ea/0xb70
  ? enqueue_entity+0xd0/0x270
  ? process_backlog+0x97/0x150
  process_backlog+0x97/0x150
  net_rx_action+0x14b/0x3e0
  __do_softirq+0xde/0x2b4
  do_softirq_own_stack+0x2a/0x40
  </IRQ>
  do_softirq.part.18+0x49/0x50
  __local_bh_enable_ip+0x49/0x50
  __dev_queue_xmit+0x4ab/0x8a0
  ? wait_woken+0x80/0x80
  ? packet_sendmsg+0x38f/0x810
  ? __dev_queue_xmit+0x8a0/0x8a0
  packet_sendmsg+0x38f/0x810
  sock_sendmsg+0x36/0x40
  __sys_sendto+0x10e/0x140
  ? do_vfs_ioctl+0xa4/0x630
  ? syscall_trace_enter+0x1df/0x2e0
  ? __audit_syscall_exit+0x22a/0x290
  __x64_sys_sendto+0x24/0x30
  do_syscall_64+0x5b/0x180
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7fd67e18dc93
 Code: 48 8b 0d 18 83 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c7 20 00 00 75 13 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 2b f7 ff ff 48 89 04 24
 RSP: 002b:00007ffe0189b748 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
 RAX: ffffffffffffffda RBX: 00000000020ca010 RCX: 00007fd67e18dc93
 RDX: 0000000000000062 RSI: 00000000020ca322 RDI: 0000000000000003
 RBP: 00007ffe0189b780 R08: 00007ffe0189b760 R09: 0000000000000014
 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000062
 R13: 00000000020ca322 R14: 00007ffe0189b760 R15: 0000000000000003
 Modules linked in: act_tunnel_key act_gact cls_flower sch_ingress vrf veth act_csum(E) xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter intel_rapl snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_realtek coretemp snd_hda_codec_generic kvm_intel kvm irqbypass snd_hda_intel crct10dif_pclmul crc32_pclmul hp_wmi ghash_clmulni_intel pcbc snd_hda_codec aesni_intel sparse_keymap rfkill snd_hda_core snd_hwdep snd_seq crypto_simd iTCO_wdt gpio_ich iTCO_vendor_support wmi_bmof cryptd mei_wdt glue_helper snd_seq_device snd_pcm pcspkr snd_timer snd i2c_i801 lpc_ich sg soundcore wmi mei_me
  mei ie31200_edac nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sd_mod sr_mod cdrom i915 video i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci crc32c_intel libahci serio_raw sfc libata mtd drm ixgbe mdio i2c_core e1000e dca
 CR2: 0000000000000000
 ---[ end trace 1ab8b5b5d4639dfc ]---
 RIP: 0010:tcf_action_exec+0xb8/0x100
 Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
 RSP: 0018:ffff95145ea03c40 EFLAGS: 00010246
 RAX: 0000000020000001 RBX: ffff9514499e5800 RCX: 0000000000000001
 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
 RBP: ffff95145ea03e60 R08: 0000000000000000 R09: ffff95145ea03c9c
 R10: ffff95145ea03c78 R11: 0000000000000008 R12: ffff951456a69800
 R13: ffff951456a69808 R14: 0000000000000001 R15: ffff95144965ee40
 FS:  00007fd67ee11740(0000) GS:ffff95145ea00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 00000001038a2006 CR4: 00000000001606f0
 Kernel panic - not syncing: Fatal exception in interrupt
 Kernel Offset: 0x11400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
 ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---

Fixes: d0f6dd8a914f ("net/sched: Introduce act_tunnel_key")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/sched: act_csum: fix NULL dereference when 'goto chain' is used
Davide Caratti [Fri, 6 Jul 2018 19:01:05 +0000 (21:01 +0200)]
net/sched: act_csum: fix NULL dereference when 'goto chain' is used

the control action in the common member of struct tcf_csum must be a valid
value, as it can contain the chain index when 'goto chain' is used. Ensure
that the control action can be read as x->tcfa_action, when x is a pointer
to struct tc_action and x->ops->type is TCA_ACT_CSUM, to prevent the
following command:

  # tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
  > $tcflags dst_mac $h2mac action csum ip or tcp or udp or sctp goto chain 1

from triggering a NULL pointer dereference when a matching packet is
received.

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 PGD 800000010416b067 P4D 800000010416b067 PUD 1041be067 PMD 0
 Oops: 0000 [#1] SMP PTI
 CPU: 0 PID: 3072 Comm: mausezahn Tainted: G            E     4.18.0-rc2.auguri+ #421
 Hardware name: Hewlett-Packard HP Z220 CMT Workstation/1790, BIOS K51 v01.58 02/07/2013
 RIP: 0010:tcf_action_exec+0xb8/0x100
 Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
 RSP: 0018:ffffa020dea03c40 EFLAGS: 00010246
 RAX: 0000000020000001 RBX: ffffa020d7ccef00 RCX: 0000000000000054
 RDX: 0000000000000000 RSI: ffffa020ca5ae000 RDI: ffffa020d7ccef00
 RBP: ffffa020dea03e60 R08: 0000000000000000 R09: ffffa020dea03c9c
 R10: ffffa020dea03c78 R11: 0000000000000008 R12: ffffa020d3fe4f00
 R13: ffffa020d3fe4f08 R14: 0000000000000001 R15: ffffa020d53ca300
 FS:  00007f5a46942740(0000) GS:ffffa020dea00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 0000000104218002 CR4: 00000000001606f0
 Call Trace:
  <IRQ>
  fl_classify+0x1ad/0x1c0 [cls_flower]
  ? arp_rcv+0x121/0x1b0
  ? __x2apic_send_IPI_dest+0x40/0x40
  ? smp_reschedule_interrupt+0x1c/0xd0
  ? reschedule_interrupt+0xf/0x20
  ? reschedule_interrupt+0xa/0x20
  ? device_is_rmrr_locked+0xe/0x50
  ? iommu_should_identity_map+0x49/0xd0
  ? __intel_map_single+0x30/0x140
  ? e1000e_update_rdt_wa.isra.52+0x22/0xb0 [e1000e]
  ? e1000_alloc_rx_buffers+0x233/0x250 [e1000e]
  ? kmem_cache_alloc+0x38/0x1c0
  tcf_classify+0x89/0x140
  __netif_receive_skb_core+0x5ea/0xb70
  ? enqueue_task_fair+0xb6/0x7d0
  ? process_backlog+0x97/0x150
  process_backlog+0x97/0x150
  net_rx_action+0x14b/0x3e0
  __do_softirq+0xde/0x2b4
  do_softirq_own_stack+0x2a/0x40
  </IRQ>
  do_softirq.part.18+0x49/0x50
  __local_bh_enable_ip+0x49/0x50
  __dev_queue_xmit+0x4ab/0x8a0
  ? wait_woken+0x80/0x80
  ? packet_sendmsg+0x38f/0x810
  ? __dev_queue_xmit+0x8a0/0x8a0
  packet_sendmsg+0x38f/0x810
  sock_sendmsg+0x36/0x40
  __sys_sendto+0x10e/0x140
  ? do_vfs_ioctl+0xa4/0x630
  ? syscall_trace_enter+0x1df/0x2e0
  ? __audit_syscall_exit+0x22a/0x290
  __x64_sys_sendto+0x24/0x30
  do_syscall_64+0x5b/0x180
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7f5a45cbec93
 Code: 48 8b 0d 18 83 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c7 20 00 00 75 13 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 2b f7 ff ff 48 89 04 24
 RSP: 002b:00007ffd0ee6d748 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
 RAX: ffffffffffffffda RBX: 0000000001161010 RCX: 00007f5a45cbec93
 RDX: 0000000000000062 RSI: 0000000001161322 RDI: 0000000000000003
 RBP: 00007ffd0ee6d780 R08: 00007ffd0ee6d760 R09: 0000000000000014
 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000062
 R13: 0000000001161322 R14: 00007ffd0ee6d760 R15: 0000000000000003
 Modules linked in: act_csum act_gact cls_flower sch_ingress vrf veth act_tunnel_key(E) xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi snd_hda_codec_realtek kvm snd_hda_codec_generic hp_wmi iTCO_wdt sparse_keymap rfkill mei_wdt iTCO_vendor_support wmi_bmof gpio_ich irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel snd_hda_intel crypto_simd cryptd snd_hda_codec glue_helper snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm pcspkr i2c_i801 snd_timer snd sg lpc_ich soundcore wmi mei_me
  mei ie31200_edac nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod cdrom sd_mod ahci libahci crc32c_intel i915 ixgbe serio_raw libata video dca i2c_algo_bit sfc drm_kms_helper syscopyarea mtd sysfillrect mdio sysimgblt fb_sys_fops drm e1000e i2c_core
 CR2: 0000000000000000
 ---[ end trace 3c9e9d1a77df4026 ]---
 RIP: 0010:tcf_action_exec+0xb8/0x100
 Code: 00 00 00 20 74 1d 83 f8 03 75 09 49 83 c4 08 4d 39 ec 75 bc 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 49 8b 97 a8 00 00 00 <48> 8b 12 48 89 55 00 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3
 RSP: 0018:ffffa020dea03c40 EFLAGS: 00010246
 RAX: 0000000020000001 RBX: ffffa020d7ccef00 RCX: 0000000000000054
 RDX: 0000000000000000 RSI: ffffa020ca5ae000 RDI: ffffa020d7ccef00
 RBP: ffffa020dea03e60 R08: 0000000000000000 R09: ffffa020dea03c9c
 R10: ffffa020dea03c78 R11: 0000000000000008 R12: ffffa020d3fe4f00
 R13: ffffa020d3fe4f08 R14: 0000000000000001 R15: ffffa020d53ca300
 FS:  00007f5a46942740(0000) GS:ffffa020dea00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 0000000104218002 CR4: 00000000001606f0
 Kernel panic - not syncing: Fatal exception in interrupt
 Kernel Offset: 0x26400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
 ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---

Fixes: 9c5f69bbd75a ("net/sched: act_csum: don't use spinlock in the fast path")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: macb: Allocate valid memory for TX and RX BD prefetch
Harini Katakam [Fri, 6 Jul 2018 06:48:58 +0000 (12:18 +0530)]
net: macb: Allocate valid memory for TX and RX BD prefetch

GEM version in ZynqMP and most versions greater than r1p07 supports
TX and RX BD prefetch. The number of BDs that can be prefetched is a
HW configurable parameter. For ZynqMP, this parameter is 4.

When GEM DMA is accessing the last BD in the ring, even before the
BD is processed and the WRAP bit is noticed, it will have prefetched
BDs outside the BD ring. These will not be processed but it is
necessary to have accessible memory after the last BD. Especially
in cases where SMMU is used, memory locations immediately after the
last BD may not have translation tables triggering HRESP errors. Hence
always allocate extra BDs to accommodate for prefetch.
The value of tx/rx bd prefetch for any given SoC version is:
2 ^ (corresponding field in design config 10 register).
(value of this field >= 1)

Added a capability flag so that older IP versions that do not have
DCFG10 or this prefetch capability are not affected.

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: macb: Free RX ring for all queues
Harini Katakam [Fri, 6 Jul 2018 06:48:57 +0000 (12:18 +0530)]
net: macb: Free RX ring for all queues

rx ring is allocated for all queues in macb_alloc_consistent.
Free the same for all queues instead of just Q0.

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: reduce sock_put() for fallback sockets
Ursula Braun [Thu, 5 Jul 2018 14:15:30 +0000 (16:15 +0200)]
net/smc: reduce sock_put() for fallback sockets

smc_release() calls a sock_put() for smc fallback sockets to cover
the passive closing sock_hold() in __smc_connect() and
smc_tcp_listen_work(). This does not make sense for sockets in state
SMC_LISTEN and SMC_INIT.
An SMC socket stays in state SMC_INIT if connect fails. The sock_put
in smc_connect_abort() does not cover all failures. Move it into
smc_connect_decline_fallback().

Fixes: ee9dfbef02d18 ("net/smc: handle sockopts forcing fallback")
Reported-by: syzbot+3a0748c8f2f210c0ef9b@syzkaller.appspotmail.com
Reported-by: syzbot+9e60d2428a42049a592a@syzkaller.appspotmail.com
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: bridge: fix br_vlan_get_{pvid,info} return values
Arnd Bergmann [Fri, 6 Jul 2018 12:44:02 +0000 (14:44 +0200)]
net: bridge: fix br_vlan_get_{pvid,info} return values

These two functions return the regular -EINVAL failure in the normal
code path, but return a nonstandard '-1' error otherwise, which gets
interpreted as -EPERM.

Let's change it to -EINVAL for the dummy functions as well.

Fixes: 4d4fd36126d6 ("net: bridge: Publish bridge accessor functions")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agocxgb4: assume flash part size to be 4MB, if it can't be determined
Casey Leedom [Sat, 7 Jul 2018 07:08:07 +0000 (12:38 +0530)]
cxgb4: assume flash part size to be 4MB, if it can't be determined

t4_get_flash_params() fails in a fatal fashion if the FLASH part isn't
one of the recognized parts. But this leads to desperate efforts to update
drivers when various FLASH parts which we are using suddenly become
unavailable and we need to substitute new FLASH parts.  This has lead to
more than one Customer Field Emergency when a Customer has an old driver
and suddenly can't use newly shipped adapters.

This commit fixes this by simply assuming that the FLASH part is 4MB in
size if it can't be identified. Note that all Chelsio adapters will have
flash parts which are at least 4MB in size.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'tipc-dad-fixes'
David S. Miller [Sat, 7 Jul 2018 10:49:02 +0000 (19:49 +0900)]
Merge branch 'tipc-dad-fixes'

Jon Maloy says:

====================
tipc: fixes in duplicate address discovery function

commit 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address
hash values") introduced new functionality that has turned out to
contain several bugs and weaknesses.

We address those in this series.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotipc: make function tipc_net_finalize() thread safe
Jon Maloy [Fri, 6 Jul 2018 18:10:06 +0000 (20:10 +0200)]
tipc: make function tipc_net_finalize() thread safe

The setting of the node address is not thread safe, meaning that
two discoverers may decide to set it simultanously, with a duplicate
entry in the name table as result. We fix that with this commit.

Fixes: 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address hash values")
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotipc: fix correct setting of message type in second discoverer
Jon Maloy [Fri, 6 Jul 2018 18:10:05 +0000 (20:10 +0200)]
tipc: fix correct setting of message type in second discoverer

The duplicate address discovery protocol is not safe against two
discoverers running in parallel. The one executing first after the
trial period is over will set the node address and change its own
message type to DSC_REQ_MSG. The one executing last may find that the
node address is already set, and never change message type, with the
result that its links may never be established.

In this commmit we ensure that the message type always is set correctly
after the trial period is over.

Fixes: 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address hash values")
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotipc: correct discovery message handling during address trial period
Jon Maloy [Fri, 6 Jul 2018 18:10:04 +0000 (20:10 +0200)]
tipc: correct discovery message handling during address trial period

With the duplicate address discovery protocol for tipc nodes addresses
we introduced a one second trial period before a node is allocated a
hash number to use as address.

Unfortunately, we miss to handle the case when a regular LINK REQUEST/
RESPONSE arrives from a cluster node during the trial period. Such
messages are not ignored as they should be, leading to links setup
attempts while the node still has no address.

Fixes: 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address hash values")
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotipc: fix wrong return value from function tipc_node_try_addr()
Jon Maloy [Fri, 6 Jul 2018 18:10:03 +0000 (20:10 +0200)]
tipc: fix wrong return value from function tipc_node_try_addr()

The function for checking if there is an node address conflict is
supposed to return a suggestion for a new address if it finds a
conflict, and zero otherwise. But in case the peer being checked
is previously unknown it does instead return a "suggestion" for
the checked address itself. This results in a DSC_TRIAL_FAIL_MSG
being sent unecessarily to the peer, and sometimes makes the trial
period starting over again.

Fixes: 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address hash values")
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'ravb-sh_eth-fix-sleep-in-atomic-by-reusing-shared-ethtool-handlers'
David S. Miller [Sat, 7 Jul 2018 01:44:10 +0000 (10:44 +0900)]
Merge branch 'ravb-sh_eth-fix-sleep-in-atomic-by-reusing-shared-ethtool-handlers'

Vladimir Zapolskiy says:

====================
ravb/sh_eth: fix sleep in atomic by reusing shared ethtool handlers

For ages trivial changes to RAVB and SuperH ethernet links by means of
standard 'ethtool' trigger a 'sleeping function called from invalid
context' bug, to visualize it on r8a7795 ULCB:

  % ethtool -r eth0
  BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747
  in_atomic(): 1, irqs_disabled(): 128, pid: 554, name: ethtool
  INFO: lockdep is turned off.
  irq event stamp: 0
  hardirqs last  enabled at (0): [<0000000000000000>]           (null)
  hardirqs last disabled at (0): [<ffff0000080e1d3c>] copy_process.isra.7.part.8+0x2cc/0x1918
  softirqs last  enabled at (0): [<ffff0000080e1d3c>] copy_process.isra.7.part.8+0x2cc/0x1918
  softirqs last disabled at (0): [<0000000000000000>]           (null)
  CPU: 5 PID: 554 Comm: ethtool Not tainted 4.17.0-rc4-arm64-renesas+ #33
  Hardware name: Renesas H3ULCB board based on r8a7795 ES2.0+ (DT)
  Call trace:
   dump_backtrace+0x0/0x198
   show_stack+0x24/0x30
   dump_stack+0xb8/0xf4
   ___might_sleep+0x1c8/0x1f8
   __might_sleep+0x58/0x90
   __mutex_lock+0x50/0x890
   mutex_lock_nested+0x3c/0x50
   phy_start_aneg_priv+0x38/0x180
   phy_start_aneg+0x24/0x30
   ravb_nway_reset+0x3c/0x68
   dev_ethtool+0x3dc/0x2338
   dev_ioctl+0x19c/0x490
   sock_do_ioctl+0xe0/0x238
   sock_ioctl+0x254/0x460
   do_vfs_ioctl+0xb0/0x918
   ksys_ioctl+0x50/0x80
   sys_ioctl+0x34/0x48
   __sys_trace_return+0x0/0x4

The root cause is that an attempt to modify ECMR and GECMR registers
only when RX/TX function is disabled was too overcomplicated in its
original implementation, also processing of an optional Link Change
interrupt added even more complexity, as a result the implementation
was error prone.

The new locking scheme is confirmed to be correct by dumping driver
specific and generic PHY framework function calls with aid of ftrace
while running more or less advanced tests.

Please note that sh_eth patches from the series were built-tested only.

On purpose I do not add Fixes tags, the reused PHY handlers were added
way later than the fixed problems were firstly found in the drivers.

Changes from v1 to v2:
* the original patches are split to bugfixes and enhancements only,
  both v1 and v2 series are absolutely equal in total, thus I omit
  description of changes in individual patches,
* the latter implies that there should be no strict need for retesting,
  but because formally two series are different, I have to drop the tags
  given by Geert and Andrew, please send your tags again.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: remove custom .set_link_ksettings from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:16:12 +0000 (11:16 +0300)]
ravb: remove custom .set_link_ksettings from ethtool ops

The generic phy_ethtool_set_link_ksettings() function from phylib can
be used instead of in-house ravb_set_link_ksettings().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: remove custom .get_link_ksettings from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:16:11 +0000 (11:16 +0300)]
ravb: remove custom .get_link_ksettings from ethtool ops

The generic phy_ethtool_get_link_ksettings() function from phylib can be
used instead of in-house ravb_get_link_ksettings().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: remove useless serialization in ravb_get_link_ksettings()
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:16:10 +0000 (11:16 +0300)]
ravb: remove useless serialization in ravb_get_link_ksettings()

phy_ethtool_ksettings_get() call does not modify device state or device
driver state, hence there is no need to utilize a driver specific
spinlock.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: remove custom .nway_reset from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:16:09 +0000 (11:16 +0300)]
ravb: remove custom .nway_reset from ethtool ops

The generic phy_ethtool_nway_reset() function from phylib can be used
instead of in-house ravb_nway_reset().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: simplify link auto-negotiation by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:16:08 +0000 (11:16 +0300)]
ravb: simplify link auto-negotiation by ethtool

There is no need to call a heavyweight phy_start_aneg() for phy
auto-negotiation by ethtool, the phy is already initialized and
link auto-negotiation is started by calling phy_start() from
ravb_phy_start() when a network device is opened.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: fix invalid context bug while changing link options by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:14:51 +0000 (11:14 +0300)]
ravb: fix invalid context bug while changing link options by ethtool

The change fixes sleep in atomic context bug, which is encountered
every time when link settings are changed by ethtool.

Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O
potentially sleeping") phy_start_aneg() function utilizes a mutex
to serialize changes to phy state, however that helper function is
called in atomic context under a grabbed spinlock, because
phy_start_aneg() is called by phy_ethtool_ksettings_set() and by
replaced phy_ethtool_sset() helpers from phylib.

Now duplex mode setting is enforced in ravb_adjust_link() only, also
now RX/TX is disabled when link is put down or modifications to E-MAC
registers ECMR and GECMR are expected for both cases of checked and
ignored link status pin state from E-MAC interrupt handler.

Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoravb: fix invalid context bug while calling auto-negotiation by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:14:50 +0000 (11:14 +0300)]
ravb: fix invalid context bug while calling auto-negotiation by ethtool

Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O
potentially sleeping") phy_start_aneg() function utilizes a mutex
to serialize changes to phy state, however the helper function is
called in atomic context.

The bug can be reproduced by running "ethtool -r" command, the bug
is reported if CONFIG_DEBUG_ATOMIC_SLEEP build option is enabled.

Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: remove custom .set_link_ksettings from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:14:49 +0000 (11:14 +0300)]
sh_eth: remove custom .set_link_ksettings from ethtool ops

The generic phy_ethtool_set_link_ksettings() function from phylib can
be used instead of in-house sh_eth_set_link_ksettings().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: remove custom .get_link_ksettings from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:14:48 +0000 (11:14 +0300)]
sh_eth: remove custom .get_link_ksettings from ethtool ops

The generic phy_ethtool_get_link_ksettings() function from phylib can be
used instead of in-house sh_eth_get_link_ksettings().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: remove useless serialization in sh_eth_get_link_ksettings()
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:14:47 +0000 (11:14 +0300)]
sh_eth: remove useless serialization in sh_eth_get_link_ksettings()

phy_ethtool_ksettings_get() call does not modify device state or device
driver state, hence there is no need to utilize a driver specific
spinlock.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: remove custom .nway_reset from ethtool ops
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:12:42 +0000 (11:12 +0300)]
sh_eth: remove custom .nway_reset from ethtool ops

The generic phy_ethtool_nway_reset() function from phylib can be used
instead of in-house sh_eth_nway_reset().

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: simplify link auto-negotiation by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:12:41 +0000 (11:12 +0300)]
sh_eth: simplify link auto-negotiation by ethtool

There is no need to call a heavyweight phy_start_aneg() for phy
auto-negotiation by ethtool, the phy is already initialized and
link auto-negotiation is started by calling phy_start() from
sh_eth_phy_start() when a network device is opened.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: fix invalid context bug while changing link options by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:12:40 +0000 (11:12 +0300)]
sh_eth: fix invalid context bug while changing link options by ethtool

The change fixes sleep in atomic context bug, which is encountered
every time when link settings are changed by ethtool.

Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O
potentially sleeping") phy_start_aneg() function utilizes a mutex
to serialize changes to phy state, however that helper function is
called in atomic context under a grabbed spinlock, because
phy_start_aneg() is called by phy_ethtool_ksettings_set() and by
replaced phy_ethtool_sset() helpers from phylib.

Now duplex mode setting is enforced in sh_eth_adjust_link() only,
also now RX/TX is disabled when link is put down or modifications
to E-MAC registers ECMR and GECMR are expected for both cases of
checked and ignored link status pin state from E-MAC interrupt handler.

For reference the change is a partial rework of commit 1e1b812bbe10
("sh_eth: fix handling of no LINK signal").

Fixes: dc19e4e5e02f ("sh: sh_eth: Add support ethtool")
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosh_eth: fix invalid context bug while calling auto-negotiation by ethtool
Vladimir Zapolskiy [Wed, 4 Jul 2018 08:12:39 +0000 (11:12 +0300)]
sh_eth: fix invalid context bug while calling auto-negotiation by ethtool

Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O
potentially sleeping") phy_start_aneg() function utilizes a mutex
to serialize changes to phy state, however the helper function is
called in atomic context.

The bug can be reproduced by running "ethtool -r" command, the bug
is reported if CONFIG_DEBUG_ATOMIC_SLEEP build option is enabled.

Fixes: dc19e4e5e02f ("sh: sh_eth: Add support ethtool")
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetfilter: nf_tables: place all set backends in one single module
Pablo Neira Ayuso [Fri, 6 Jul 2018 17:06:43 +0000 (19:06 +0200)]
netfilter: nf_tables: place all set backends in one single module

This patch disallows rbtree with single elements, which is causing
problems with the recent timeout support. Before this patch, you
could opt out individual set representations per module, which is
just adding extra complexity.

Fixes: 8d8540c4f5e0("netfilter: nft_set_rbtree: add timeout support")
Reported-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: nf_tproxy: fix possible non-linear access to transport header
Máté Eckl [Thu, 5 Jul 2018 10:01:53 +0000 (12:01 +0200)]
netfilter: nf_tproxy: fix possible non-linear access to transport header

This patch fixes a silent out-of-bound read possibility that was present
because of the misuse of this function.

Mostly it was called with a struct udphdr *hp which had only the udphdr
part linearized by the skb_header_pointer, however
nf_tproxy_get_sock_v{4,6} uses it as a tcphdr pointer, so some reads for
tcp specific attributes may be invalid.

Fixes: a583636a83ea ("inet: refactor inet[6]_lookup functions to take skb")
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agoipv4: Return EINVAL when ping_group_range sysctl doesn't map to user ns
Tyler Hicks [Thu, 5 Jul 2018 18:49:23 +0000 (18:49 +0000)]
ipv4: Return EINVAL when ping_group_range sysctl doesn't map to user ns

The low and high values of the net.ipv4.ping_group_range sysctl were
being silently forced to the default disabled state when a write to the
sysctl contained GIDs that didn't map to the associated user namespace.
Confusingly, the sysctl's write operation would return success and then
a subsequent read of the sysctl would indicate that the low and high
values are the overflowgid.

This patch changes the behavior by clearly returning an error when the
sysctl write operation receives a GID range that doesn't map to the
associated user namespace. In such a situation, the previous value of
the sysctl is preserved and that range will be returned in a subsequent
read of the sysctl.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: vlan unicast address list correct handling
Igor Russkikh [Thu, 5 Jul 2018 14:01:09 +0000 (17:01 +0300)]
net: aquantia: vlan unicast address list correct handling

Setting up macvlan/macvtap networks over atlantic NIC results
in no traffic over these networks because ndo_set_rx_mode did
not listed UC MACs as registered in unicast filter.

Here we fix that taking into account maximum number of UC
filters supported by hardware. If more than MAX addresses were
registered, we just enable promisc  and/or allmulti to pass
the traffic in.

We also remove MULTICAST_ADDRESS_MAX constant from aq_cfg since
thats not a configurable parameter at all.

Fixes: b21f502 ("net:ethernet:aquantia: Fix for multicast filter handling.")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMAINTAINERS: update my email address
Stefan Schmidt [Thu, 5 Jul 2018 11:56:44 +0000 (13:56 +0200)]
MAINTAINERS: update my email address

The mail server hosting the old address is going to fade out.
Time to update to an address I control directly.

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoliquidio: make timeout HZ independent and readable
Nicholas Mc Guire [Mon, 2 Jul 2018 18:13:15 +0000 (20:13 +0200)]
liquidio: make timeout HZ independent and readable

schedule_timeout_* takes a timeout in jiffies but the code currently is
passing in a constant which makes this timeout HZ dependent. So define
a constant with (hopefully) meaningful name and pass it through
msecs_to_jiffies() to fix the HZ dependency.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
commit f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters")
Acked-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoqmi_wwan: add support for Quectel EG91
Matevz Vucnik [Wed, 4 Jul 2018 16:12:48 +0000 (18:12 +0200)]
qmi_wwan: add support for Quectel EG91

This adds the USB id of LTE modem Quectel EG91. It requires the
same quirk as other Quectel modems to make it work.

Signed-off-by: Matevz Vucnik <vucnikm@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'qrtr-Broadcasting-control-messages'
David S. Miller [Thu, 5 Jul 2018 11:20:03 +0000 (20:20 +0900)]
Merge branch 'qrtr-Broadcasting-control-messages'

Arun Kumar Neelakantam says:

====================
net: qrtr: Broadcasting control messages

Allow messages only from control port to broadcast to avoid unnecessary
messages and reset the node to local router NODE ID in control messages
otherwise remote routers consider the packets as invalid and Drops it.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: qrtr: Reset the node and port ID of broadcast messages
Arun Kumar Neelakantam [Wed, 4 Jul 2018 14:19:33 +0000 (19:49 +0530)]
net: qrtr: Reset the node and port ID of broadcast messages

All the control messages broadcast to remote routers are using
QRTR_NODE_BCAST instead of using local router NODE ID which cause
the packets to be dropped on remote router due to invalid NODE ID.

Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: qrtr: Broadcast messages only from control port
Arun Kumar Neelakantam [Wed, 4 Jul 2018 14:19:32 +0000 (19:49 +0530)]
net: qrtr: Broadcast messages only from control port

The broadcast node id should only be sent with the control port id.

Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoipv6: make ipv6_renew_options() interrupt/kernel safe
Paul Moore [Wed, 4 Jul 2018 13:58:05 +0000 (09:58 -0400)]
ipv6: make ipv6_renew_options() interrupt/kernel safe

At present the ipv6_renew_options_kern() function ends up calling into
access_ok() which is problematic if done from inside an interrupt as
access_ok() calls WARN_ON_IN_IRQ() on some (all?) architectures
(x86-64 is affected).  Example warning/backtrace is shown below:

 WARNING: CPU: 1 PID: 3144 at lib/usercopy.c:11 _copy_from_user+0x85/0x90
 ...
 Call Trace:
  <IRQ>
  ipv6_renew_option+0xb2/0xf0
  ipv6_renew_options+0x26a/0x340
  ipv6_renew_options_kern+0x2c/0x40
  calipso_req_setattr+0x72/0xe0
  netlbl_req_setattr+0x126/0x1b0
  selinux_netlbl_inet_conn_request+0x80/0x100
  selinux_inet_conn_request+0x6d/0xb0
  security_inet_conn_request+0x32/0x50
  tcp_conn_request+0x35f/0xe00
  ? __lock_acquire+0x250/0x16c0
  ? selinux_socket_sock_rcv_skb+0x1ae/0x210
  ? tcp_rcv_state_process+0x289/0x106b
  tcp_rcv_state_process+0x289/0x106b
  ? tcp_v6_do_rcv+0x1a7/0x3c0
  tcp_v6_do_rcv+0x1a7/0x3c0
  tcp_v6_rcv+0xc82/0xcf0
  ip6_input_finish+0x10d/0x690
  ip6_input+0x45/0x1e0
  ? ip6_rcv_finish+0x1d0/0x1d0
  ipv6_rcv+0x32b/0x880
  ? ip6_make_skb+0x1e0/0x1e0
  __netif_receive_skb_core+0x6f2/0xdf0
  ? process_backlog+0x85/0x250
  ? process_backlog+0x85/0x250
  ? process_backlog+0xec/0x250
  process_backlog+0xec/0x250
  net_rx_action+0x153/0x480
  __do_softirq+0xd9/0x4f7
  do_softirq_own_stack+0x2a/0x40
  </IRQ>
  ...

While not present in the backtrace, ipv6_renew_option() ends up calling
access_ok() via the following chain:

  access_ok()
  _copy_from_user()
  copy_from_user()
  ipv6_renew_option()

The fix presented in this patch is to perform the userspace copy
earlier in the call chain such that it is only called when the option
data is actually coming from userspace; that place is
do_ipv6_setsockopt().  Not only does this solve the problem seen in
the backtrace above, it also allows us to simplify the code quite a
bit by removing ipv6_renew_options_kern() completely.  We also take
this opportunity to cleanup ipv6_renew_options()/ipv6_renew_option()
a small amount as well.

This patch is heavily based on a rough patch by Al Viro.  I've taken
his original patch, converted a kmemdup() call in do_ipv6_setsockopt()
to a memdup_user() call, made better use of the e_inval jump target in
the same function, and cleaned up the use ipv6_renew_option() by
ipv6_renew_options().

CC: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoqed: off by one in qed_parse_mcp_trace_buf()
Dan Carpenter [Wed, 4 Jul 2018 09:52:36 +0000 (12:52 +0300)]
qed: off by one in qed_parse_mcp_trace_buf()

If format_idx == s_mcp_trace_meta.formats_num then we read one element
beyond the end of the s_mcp_trace_meta.formats[] array.

Fixes: 50bc60cb155c ("qed*: Utilize FW 8.33.11.0")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetfilter: x_tables: set module owner for icmp(6) matches
Florian Westphal [Wed, 4 Jul 2018 18:25:32 +0000 (20:25 +0200)]
netfilter: x_tables: set module owner for icmp(6) matches

nft_compat relies on xt_request_find_match to increment
refcount of the module that provides the match/target.

The (builtin) icmp matches did't set the module owner so it
was possible to rmmod ip(6)tables while icmp extensions were still in use.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agoieee802154: 6lowpan: set IFLA_LINK
Lubomir Rintel [Mon, 2 Jul 2018 09:21:47 +0000 (11:21 +0200)]
ieee802154: 6lowpan: set IFLA_LINK

Otherwise NetworkManager (and iproute alike) is not able to identify the
parent IEEE 802.15.4 interface of a 6LoWPAN link.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agoieee802154: mcr20a: add missing includes
Arnd Bergmann [Wed, 30 May 2018 21:47:09 +0000 (23:47 +0200)]
ieee802154: mcr20a: add missing includes

Without CONFIG_GPIOLIB, some headers are not included implicitly,
leading to a build failure:

drivers/net/ieee802154/mcr20a.c: In function 'mcr20a_probe':
drivers/net/ieee802154/mcr20a.c:1347:13: error: implicit declaration of function 'irq_get_trigger_type'; did you mean 'irq_get_irqchip_state'? [-Werror=implicit-function-declaration]

This includes gpio/consumer.h and irq.h directly rather through the
gpiolib header.

Fixes: 8c6ad9cc5157 ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Xue Liu <liuxuenetmail@gmail.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
5 years agosamples/bpf: add .gitignore file
Taeung Song [Wed, 4 Jul 2018 13:36:39 +0000 (22:36 +0900)]
samples/bpf: add .gitignore file

For untracked executables of samples/bpf, add this.

  Untracked files:
    (use "git add <file>..." to include in what will be committed)

   samples/bpf/cpustat
   samples/bpf/fds_example
   samples/bpf/lathist
   samples/bpf/load_sock_ops
...

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
5 years agosamples/bpf: Check the error of write() and read()
Taeung Song [Wed, 4 Jul 2018 13:36:38 +0000 (22:36 +0900)]
samples/bpf: Check the error of write() and read()

test_task_rename() and test_urandom_read()
can be failed during write() and read(),
So check the result of them.

Reviewed-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
5 years agosamples/bpf: Check the result of system()
Taeung Song [Wed, 4 Jul 2018 13:36:37 +0000 (22:36 +0900)]
samples/bpf: Check the result of system()

To avoid the below build warning message,
use new generate_load() checking the return value.

  ignoring return value of ‘system’, declared with attribute warn_unused_result

And it also refactors the duplicate code of both
test_perf_event_all_cpu() and test_perf_event_task()

Cc: Teng Qin <qinteng@fb.com>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
5 years agosamples/bpf: add missing <linux/if_vlan.h>
Taeung Song [Wed, 4 Jul 2018 13:36:36 +0000 (22:36 +0900)]
samples/bpf: add missing <linux/if_vlan.h>

This fixes build error regarding redefinition:

    CLANG-bpf  samples/bpf/parse_varlen.o
  samples/bpf/parse_varlen.c:111:8: error: redefinition of 'vlan_hdr'
  struct vlan_hdr {
         ^
  ./include/linux/if_vlan.h:38:8: note: previous definition is here

So remove duplicate 'struct vlan_hdr' in sample code and include if_vlan.h

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
5 years agoqed: Fix reading stale configuration information
Denis Bolotin [Wed, 4 Jul 2018 14:06:46 +0000 (17:06 +0300)]
qed: Fix reading stale configuration information

Configuration information read at driver load can become stale after it is
updated. Mark information as not valid and re-populate when this happens.

Signed-off-by: Denis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: fix flag masking in __set_phy_supported
Heiner Kallweit [Tue, 3 Jul 2018 20:34:54 +0000 (22:34 +0200)]
net: phy: fix flag masking in __set_phy_supported

Currently also the pause flags are removed from phydev->supported because
they're not included in PHY_DEFAULT_FEATURES. I don't think this is
intended, especially when considering that this function can be called
via phy_set_max_speed() anywhere in a driver. Change the masking to mask
out only the values we're going to change. In addition remove the
misleading comment, job of this small function is just to adjust the
supported and advertised speeds.

Fixes: f3a6bd393c2c ("phylib: Add phy_set_max_speed helper")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosmsc75xx: Add workaround for gigabit link up hardware errata.
Yuiko Oshino [Tue, 3 Jul 2018 15:21:46 +0000 (11:21 -0400)]
smsc75xx: Add workaround for gigabit link up hardware errata.

In certain conditions, the device may not be able to link in gigabit mode. This software workaround ensures that the device will not enter the failure state.

Fixes: d0cad871703b898a442e4049c532ec39168e5b57 ("SMSC75XX USB 2.0 Gigabit Ethernet Devices")
Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: fix the issue that pathmtu may be set lower than MINSEGMENT
Xin Long [Tue, 3 Jul 2018 08:30:47 +0000 (16:30 +0800)]
sctp: fix the issue that pathmtu may be set lower than MINSEGMENT

After commit b6c5734db070 ("sctp: fix the handling of ICMP Frag Needed
for too small MTUs"), sctp_transport_update_pmtu would refetch pathmtu
from the dst and set it to transport's pathmtu without any check.

The new pathmtu may be lower than MINSEGMENT if the dst is obsolete and
updated by .get_dst() in sctp_transport_update_pmtu. In this case, it
could have a smaller MTU as well, and thus we should validate it
against MINSEGMENT instead.

Syzbot reported a warning in sctp_mtu_payload caused by this.

This patch refetches the pathmtu by calling sctp_dst_mtu where it does
the check against MINSEGMENT.

v1->v2:
  - refetch the pathmtu by calling sctp_dst_mtu instead as Marcelo's
    suggestion.

Fixes: b6c5734db070 ("sctp: fix the handling of ICMP Frag Needed for too small MTUs")
Reported-by: syzbot+f0d9d7cba052f9344b03@syzkaller.appspotmail.com
Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/ipv6: Revert attempt to simplify route replace and append
David Ahern [Tue, 3 Jul 2018 21:36:21 +0000 (14:36 -0700)]
net/ipv6: Revert attempt to simplify route replace and append

NetworkManager likes to manage linklocal prefix routes and does so with
the NLM_F_APPEND flag, breaking attempts to simplify the IPv6 route
code and by extension enable multipath routes with device only nexthops.

Revert f34436a43092 and these followup patches:
6eba08c3626b ("ipv6: Only emit append events for appended routes").
ce45bded6435 ("mlxsw: spectrum_router: Align with new route replace logic")
53b562df8c20 ("mlxsw: spectrum_router: Allow appending to dev-only routes")

Update the fib_tests cases to reflect the old behavior.

Fixes: f34436a43092 ("net/ipv6: Simplify route replace and appending into multipath route")
Signed-off-by: David Ahern <dsahern@gmail.com>