signal: sys_pause() should check signal_pending()

ERESTART* is always wrong without TIF_SIGPENDING. Teach sys_pause() to handle the spurious wakeup correctly. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
git-mirror · May 25, 2011 · d92fcf0 · d92fcf0
1 parent 0666fb5
commit d92fcf0
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/kernel/signal.c b/kernel/signal.c
@@ -3023,8 +3023,10 @@ SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler)
 
 SYSCALL_DEFINE0(pause)
 {
-	current->state = TASK_INTERRUPTIBLE;
-	schedule();
+	while (!signal_pending(current)) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+	}
 	return -ERESTARTNOHAND;
 }