[PATCH 0/2] audit: fix soft lockups and udevd errors when audit isoverrun

[Chuck Anderson]

The two patches that follow in separate emails resolve soft lockups and
udevd reported errors that prevented a large memory 3.8 system from booting.

The patches are based on 3.11-rc7.

I believe it is the same issue recently posted as:

  [RFC] audit: avoid soft lockup in audit_log_start()
  https://lkml.org/lkml/2013/8/28/626

The first patch:

  audit: fix soft lockups due to loop in audit_log_start() when 
audit_backlog_limit exceeded

fixes a bug in kernel/audit that caused many soft lockups during boot:

  BUG: soft lockup - CPU#66 stuck for 22s! [udevd:9559]
  RIP: 0010:[<ffffffff810d1d06>]  [<ffffffff810d1d06>] 
audit_log_start+0xe6/0x350
  Call Trace:
   [<ffffffff8108ea30>] ? try_to_wake_up+0x2d0/0x2d0
   [<ffffffff810d8d6f>] audit_log_exit+0x3f/0x590
   [<ffffffff810d975d>] __audit_syscall_exit+0x28d/0x2c0
   [<ffffffff815e0440>] sysret_audit+0x17/0x21

The second patch:

  audit: Two efficiency fixes for audit mechanism

prevents these and similar error messages repeated often during boot:

  udevd[876]: worker [887] unexpectedly returned with status 0x0100
  udevd[876]: worker [887] failed while handling 
'/devices/pci0000:00/0000:00:03.0/0000:40:00.0'
  udevd[876]: worker [880] unexpectedly returned with status 0x0100
  udevd[876]: worker [880] failed while handling 
'/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1'

  udevadm settle - timeout of 180 seconds reached, the event queue 
contains:
    /sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1 (3995)
    /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/INT3F0D:00 (4034)

  audit: audit_backlog=258 > audit_backlog_limit=256
  audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=256
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/