Rafael Aquini 0f3d2b0135 ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races ... After the locking semantics for the SysV IPC API got improved, a couple of IPC_RMID race windows were opened because we ended up dropping the 'kern_ipc_perm.deleted' check performed way down in ipc_lock(). The spotted races got sorted out by re-introducing the old test within the racy critical sections. This patch introduces ipc_valid_object() to consolidate the way we cope with IPC_RMID races by using the same abstraction across the API implementation. Signed-off-by: Rafael Aquini <aquini@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Greg Thelen <gthelen@google.com> Reviewed-by: Davidlohr Bueso <davidlohr@hp.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-01-27 21:02:39 -08:00
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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, msg: forbid negative values for "msg{max,mnb,mni}"	2013-11-03 10:53:11 -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	locks: break delegations on unlink	2013-11-09 00:16:42 -05:00
msg.c	ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races	2014-01-27 21:02:39 -08:00
msgutil.c	ipc, msg: fix message length check for negative values	2013-11-13 12:09:36 +09:00
namespace.c	ipc: drop ipc_lock_by_ptr	2013-09-11 15:59:44 -07:00
sem.c	ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races	2014-01-27 21:02:39 -08:00
shm.c	ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races	2014-01-27 21:02:39 -08:00
syscall.c	get rid of union semop in sys_semctl(2) arguments	2013-03-05 15:14:16 -05:00
util.c	ipc/util.c: remove unnecessary work pending test	2013-11-13 12:09:36 +09:00
util.h	ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races	2014-01-27 21:02:39 -08:00