ipc/shm: avoid ipc_rcu_alloc()
authorKees Cook <keescook@chromium.org>
Wed, 12 Jul 2017 21:35:05 +0000 (14:35 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 12 Jul 2017 23:26:01 +0000 (16:26 -0700)
commit3e0c24042e5aa55eee817caeca67246df69931e1
treecbc852c2acea7b8f0dfd9e3f31dc4f6291a6e128
parent101ede01dfd5072651965e974bc6e30c8d0748e2
ipc/shm: avoid ipc_rcu_alloc()

Instead of using ipc_rcu_alloc() which only performs the refcount bump,
open code it.  This also allows for shmid_kernel structure layout to be
randomized in the future.

Link: http://lkml.kernel.org/r/20170525185107.12869-11-manfred@colorfullife.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ipc/shm.c