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SubjectRe: [PATCH] fix send_sigqueue() vs thread exit race
Thomas Gleixner wrote:
>
> @@ -1427,7 +1434,18 @@ send_group_sigqueue(int sig, struct sigq
> int ret = 0;
>
> BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));
> - read_lock(&tasklist_lock);
> +retry:
> + if (unlikely(p->flags & PF_EXITING))
> + return -1;
> +

I don't think this is correct. p == ->group_leader, it may
have been exited and in EXIT_ZOMBIE state. But the thread
group (process) is live, we should not stop posix timers.

Oleg.
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