linux-kernel - Re: [PATCH] posix-timers: Fix a race with __exit

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Message-ID: <87frn5vjul.ffs@tglx>
Date: Mon, 02 Dec 2024 22:46:42 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Ilya Leoshkevich <iii@...ux.ibm.com>
Cc: LKML <linux-kernel@...r.kernel.org>, Frederic Weisbecker
 <frederic@...nel.org>, Oleg Nesterov <oleg@...hat.com>, Heiko Carstens
 <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, Alexander Gordeev
 <agordeev@...ux.ibm.com>, Richard Henderson
 <richard.henderson@...aro.org>, Ilya Leoshkevich <iii@...ux.ibm.com>
Subject: Re: [PATCH] posix-timers: Fix a race with __exit_signal()

On Mon, Dec 02 2024 at 16:54, Ilya Leoshkevich wrote:
> If a thread exit happens simultaneously with a POSIX timer signal, this
> POSIX timer may end up being erroneously stopped. This problem may be
> reproduced with a small C program that creates a POSIX timer and
> constantly respawns threads, e.g. [1].

AFAICT this has been fixed with commit:

  63dffecfba3e ("posix-timers: Target group sigqueue to current task only if not exiting")

Are you sure, that you have this commit in your testing? It's in rc1.

Thanks,

        tglx