[PATCH 0/1] (Was: WARNING in task_participate_group_stop)

From: Oleg Nesterov
Date: Wed Nov 04 2015 - 13:22:33 EST

On 11/02, Oleg Nesterov wrote:
> and I think this should be fixed anyway, if nothing else to make this logic more
> correct.

Yes, please see the patch.

> I'll try to recheck this all later.

I found more problems, will try to send the fixes/cleanups tomorrow...

do_signal_stop() is buggy, a multi-threaded exec can miss SIGSTOP.

task_participate_group_stop() and prepare_signal() are buggy. We
must not clear UNKILLABLE when we set STOPPED/CONTINUED.

signal_group_exit() can probably die, it was added before we had

This reminds that we should finally remove signal_pending() check
in fatal_signal_pending(). And change force_sig_info() to take
->ptrace into account.


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