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

[Oleg Nesterov]

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.