Re: [PATCH 2/2] signal: don't allow STOP on PF_IO_WORKER threads

Oleg Nesterov
2021-03-22T16:16:40Z

On 03/20, Jens Axboe wrote:
>
> --- a/kernel/signal.c
> +++ b/kernel/signal.c
> @@ -2349,6 +2349,10 @@ static bool do_signal_stop(int signr)
>
> t = current;
> while_each_thread(current, t) {
> + /* don't STOP PF_IO_WORKER threads */
> + if (t->flags & PF_IO_WORKER)
> + continue;
> +

This is not enough. At least task_join_group_stop() should check
PF_IO_WORKER too.

Oleg.