The patch titled
Subject: signals: avoid random wakeups in sigsuspend()
has been removed from the -mm tree. Its filename was
signals-work-around-random-wakeups-in-sigsuspend.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN kernel/signal.c~signals-work-around-random-wakeups-in-sigsuspend kernel/signal.c
--- a/kernel/signal.c~signals-work-around-random-wakeups-in-sigsuspend
+++ a/kernel/signal.c
@@ -3508,8 +3508,10 @@ static int sigsuspend(sigset_t *set)
current->saved_sigmask = current->blocked;
set_current_blocked(set);
- __set_current_state(TASK_INTERRUPTIBLE);
- schedule();
+ while (!signal_pending(current)) {
+ __set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
set_restore_sigmask();
return -ERESTARTNOHAND;
}
_
Patches currently in -mm which might be from sasha.levin@xxxxxxxxxx are
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