In order for load/store tearing to work, _all_ accesses to the variable in question need to be done around READ and WRITE_ONCE() macros. Ensure everyone does so for q->status variable for semtimedop().
Signed-off-by: Davidlohr Bueso <dbu...@suse.de> --- ipc/sem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ipc/sem.c b/ipc/sem.c index 6cbbf34a44ac..ccab4e51d351 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -2125,7 +2125,7 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops, } do { - queue.status = -EINTR; + WRITE_ONCE(queue.status, -EINTR); queue.sleeper = current; __set_current_state(TASK_INTERRUPTIBLE); -- 2.16.4