zfs/module/spl
Brian Behlendorf b8b6e4c453 Fix NULL deref in balance_pgdat()
Be careful not to unconditionally clear the PF_MEMALLOC bit in
the task structure.  It may have already been set when entering
kv_alloc() in which case it must remain set on exit.  In
particular the kswapd thread will have PF_MEMALLOC set in
order to prevent it from entering direct reclaim.  By clearing
it we allow the following NULL deref to potentially occur.

  BUG: unable to handle kernel NULL pointer dereference at (null)
  IP: [<ffffffff8109c7ab>] balance_pgdat+0x25b/0x4ff

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes ZFS issue 
2011-11-03 09:50:22 -07:00
..
.gitignore sun-misc-gitignore 2010-01-08 09:37:54 -08:00
Makefile.in Fix zlib compression 2011-02-25 16:56:22 -08:00
spl-atomic.c Linux 2.6.39 compat, DEFINE_SPINLOCK() 2011-04-20 12:01:11 -07:00
spl-condvar.c Block in cv_destroy() on all waiters 2011-02-04 14:09:08 -08:00
spl-cred.c Add crgetfsuid()/crgetfsgid() helpers 2011-03-22 12:18:44 -07:00
spl-debug.c Fix zlib compression 2011-02-25 16:56:22 -08:00
spl-err.c Prefix all SPL debug macros with 'S' 2010-07-20 13:30:40 -07:00
spl-generic.c Remove /etc/hostid missing warning 2011-10-06 14:58:09 -07:00
spl-kmem.c Fix NULL deref in balance_pgdat() 2011-11-03 09:50:22 -07:00
spl-kobj.c Remove VN_HOLD/VN_RELE/VOP_PUTPAGE 2011-01-12 11:38:05 -08:00
spl-kstat.c Prefix all SPL debug macros with 'S' 2010-07-20 13:30:40 -07:00
spl-module.c Linux 2.6.39 compat, DEFINE_SPINLOCK() 2011-04-20 12:01:11 -07:00
spl-mutex.c Public Release Prep 2010-05-17 15:18:00 -07:00
spl-proc.c Correct typos in the spl proc handler. 2011-04-24 20:56:07 -05:00
spl-rwlock.c Public Release Prep 2010-05-17 15:18:00 -07:00
spl-taskq.c Add TASKQ_NORECLAIM flag 2011-05-06 15:23:58 -07:00
spl-thread.c Add Thread Specific Data (TSD) Implementation 2010-12-07 10:02:32 -08:00
spl-time.c Minor 32-bit fix cast to hrtime_t before the mutliply. 2010-05-23 09:51:17 -07:00
spl-tsd.c Add Thread Specific Data (TSD) Implementation 2010-12-07 10:02:32 -08:00
spl-vnode.c vn_rdwr() didn't properly advance the file position 2011-10-18 16:51:35 -07:00
spl-xdr.c Prefix all SPL debug macros with 'S' 2010-07-20 13:30:40 -07:00
spl-zlib.c Linux 2.6.39 compat, zlib_deflate_workspacesize() 2011-04-20 14:39:15 -07:00