Li Zefan 091d0d55b2 shm: fix null pointer deref when userspace specifies invalid hugepage size ...

Dave reported an oops triggered by trinity:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  IP: newseg+0x10d/0x390
  PGD cf8c1067 PUD cf8c2067 PMD 0
  Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
  CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+#67
  ...
  Call Trace:
    ipcget+0x182/0x380
    SyS_shmget+0x5a/0x60
    tracesys+0xdd/0xe2

This bug was introduced by commit af73e4d950 ("hugetlbfs: fix mmap
failure in unaligned size request").

Reported-by: Dave Jones <[email protected]>
Cc: <[email protected]>
Signed-off-by: Li Zefan <[email protected]>
Reviewed-by: Naoya Horiguchi <[email protected]>
Acked-by: Rik van Riel <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2013-05-09 14:22:47 -07:00

..

compat_mq.c

ipc: initialize structure memory to zero for compat functions

2010-10-27 18:03:13 -07:00

compat.c

get rid of union semop in sys_semctl(2) arguments

2013-03-05 15:14:16 -05:00

ipc_sysctl.c

ipc: add sysctl to specify desired next object id

2013-01-04 16:11:45 -08:00

ipcns_notifier.c

ipc: do not use a negative value to re-enable msgmni automatic recomputing

2008-07-25 10:53:42 -07:00

Makefile

Add generic sys_ipc wrapper

2010-03-12 15:52:32 -08:00

mq_sysctl.c

mqueue: separate mqueue default value from maximum value

2012-05-31 17:49:31 -07:00

mqueue.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2013-03-28 13:43:46 -07:00

msg.c

ipc/msg.c: use list_for_each_entry_[safe] for list traversing

2013-05-01 08:12:58 -07:00

msgutil.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

namespace.c

proc: Split the namespace stuff out into linux/proc_ns.h

2013-05-01 17:29:39 -04:00

sem.c

ipc,sem: fix semctl(..., GETNCNT)

2013-05-09 14:17:47 -07:00

shm.c

shm: fix null pointer deref when userspace specifies invalid hugepage size

2013-05-09 14:22:47 -07:00

syscall.c

get rid of union semop in sys_semctl(2) arguments

2013-03-05 15:14:16 -05:00

util.c

ipc_schedule_free() can do vfree() directly now

2013-05-02 08:03:33 -07:00

util.h

ipc,sem: fine grained locking for semtimedop

2013-05-01 08:12:58 -07:00