tree 56e8dd97ecfe996c6337c17e8255fa4bf716bcf2
parent df48ab3c2f5ffca88b7803ffbadd074bd5a0a2ef
author Sasha Levin <sasha.levin@oracle.com> 1454715365 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1454724640 -0800

signals: avoid random wakeups in sigsuspend()

A random wakeup can get us out of sigsuspend() without TIF_SIGPENDING
being set.

Avoid that by making sure we were signaled, like sys_pause() does.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>