Davidlohr Bueso 5f2a2d5d42 ipc,msg: drop dst nil validation in copy_msg ... d0edd85283 ("ipc: convert invalid scenarios to use WARN_ON") relaxed the nil dst parameter check, originally being a full BUG_ON. However, this check seems quite unnecessary when the only purpose is for ceckpoint/restore (MSG_COPY flag): o The copy variable is set initially to nil, apparently as a way of ensuring that prepare_copy is previously called. Which is in fact done, unconditionally at the beginning of do_msgrcv. o There is no concurrency with 'copy' (stack allocated in do_msgrcv). Furthermore, any errors in 'copy' (and thus prepare_copy/copy_msg) should always handled by IS_ERR() family. Therefore remove this check altogether as it can never occur with the current users. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-11-06 17:50:42 -08:00
..
compat_mq.c	ipc, kernel: use Linux headers	2014-06-06 16:08:14 -07:00
compat.c	ipc: resolve shadow warnings	2014-10-14 02:18:23 +02:00
ipc_sysctl.c	ipc/msg: increase MSGMNI, remove scaling	2014-12-13 12:42:52 -08:00
Makefile	ipc/msg: increase MSGMNI, remove scaling	2014-12-13 12:42:52 -08:00
mq_sysctl.c	ipc: convert use of typedef ctl_table to struct ctl_table	2014-06-06 16:08:16 -07:00
mqueue.c	ipc: modify message queue accounting to not take kernel data structures into account	2015-08-07 04:39:39 +03:00
msg.c	Initialize msg/shm IPC objects before doing ipc_addid()	2015-09-30 12:48:40 -04:00
msgutil.c	ipc,msg: drop dst nil validation in copy_msg	2015-11-06 17:50:42 -08:00
namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-16 15:53:03 -08:00
sem.c	ipc/sem.c: update/correct memory barriers	2015-08-14 15:56:32 -07:00
shm.c	Initialize msg/shm IPC objects before doing ipc_addid()	2015-09-30 12:48:40 -04:00
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()	2015-09-30 12:48:40 -04:00
util.h	ipc: rename ipc_obtain_object	2015-06-30 19:44:58 -07:00