Re: [PATCH] signal: protect SIGNAL_UNKILLABLE from unintentional clearing.

From	Oleg Nesterov <oleg@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
Date	2016-11-17 20:10 +0100
Message-ID	<sEAem-4Lb-27@gated-at.bofh.it> (permalink)
References	<sE7YJ-2Un-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 11/16, Jamie Iles wrote:
>
> This can result in init becoming stoppable/killable after tracing.  For
> example, running:
>
>   while true; do kill -STOP 1; done &
>   strace -p 1

> and then stopping strace and the kill loop will result in init being
> left in state TASK_STOPPED.  Sending SIGCONT to init will resume it, but
> init will now respond to future SIGSTOP signals rather than ignoring
> them.

Yes, and a lot more... I forgot about these problems again.

Jamie, sorry for delay, I'll try to read the patch and reply tomorrow.

Oleg.

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[PATCH] signal: protect SIGNAL_UNKILLABLE from unintentional clearing. Jamie Iles <jamie.iles@oracle.com> - 2016-11-16 14:00 +0100
  Re: [PATCH] signal: protect SIGNAL_UNKILLABLE from unintentional         clearing. Oleg Nesterov <oleg@redhat.com> - 2016-11-17 20:10 +0100

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