Linus Torvalds 162d3c2fd8 Initialize msg/shm IPC objects before doing ipc_addid() ... commit b9a532277938798b53178d5a66af6e2915cb27cf upstream. As reported by Dmitry Vyukov, we really shouldn't do ipc_addid() before having initialized the IPC object state. Yes, we initialize the IPC object in a locked state, but with all the lockless RCU lookup work, that IPC object lock no longer means that the state cannot be seen. We already did this for the IPC semaphore code (see commit e8577d1f0329: "ipc/sem.c: fully initialize sem_array before making it visible") but we clearly forgot about msg and shm. Reported-by: Dmitry Vyukov <dvyukov@google.com> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-10-22 14:37:51 -07:00
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compat.c	ipc: fix compat msgrcv with negative msgtyp	2015-04-19 10:10:50 +02:00
compat_mq.c	ipc: initialize structure memory to zero for compat functions	2010-10-27 18:03:13 -07:00
ipc_sysctl.c	ipc: always handle a new value of auto_msgmni	2014-11-21 09:22:54 -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	ipc,mqueue: remove limits for the amount of system-wide queues	2014-03-06 21:30:12 -08:00
mqueue.c	ipc: modify message queue accounting to not take kernel data structures into account	2015-08-16 20:51:40 -07:00
msg.c	Initialize msg/shm IPC objects before doing ipc_addid()	2015-10-22 14:37:51 -07:00
msgutil.c	ipc, msg: fix message length check for negative values	2013-12-04 10:56:10 -08:00
namespace.c	ipc: drop ipc_lock_by_ptr	2013-10-18 07:45:48 -07:00
sem.c	ipc/sem.c: update/correct memory barriers	2015-09-13 09:07:59 -07:00
shm.c	Initialize msg/shm IPC objects before doing ipc_addid()	2015-10-22 14:37:51 -07:00
syscall.c	get rid of union semop in sys_semctl(2) arguments	2013-03-05 15:14:16 -05:00
util.c	Initialize msg/shm IPC objects before doing ipc_addid()	2015-10-22 14:37:51 -07:00
util.h	ipc, msg: fix message length check for negative values	2013-12-04 10:56:10 -08:00