linux

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Manfred Spraul 0d97a82ba8 ipc/msg.c: update and document memory barriers

Transfer findings from ipc/mqueue.c:

- A control barrier was missing for the lockless receive case So in
  theory, not yet initialized data may have been copied to user space -
  obviously only for architectures where control barriers are not NOP.

- use smp_store_release().  In theory, the refount may have been
  decreased to 0 already when wake_q_add() tries to get a reference.

Link: http://lkml.kernel.org/r/20191020123305.14715-5-manfred@colorfullife.com
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: <1vier1@web.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2020-02-04 03:05:24 +00:00

compat.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ipc_sysctl.c

proc/sysctl: add shared variables for range check

2019-07-18 17:08:07 -07:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mq_sysctl.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441