linux-kernel - Re: [PATCH] fix race between exit

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Message-ID: <CAHk-=wiiqOsnqHmC+wiYNA0RvKJQJLZKaGqxfWn_VasuEYVwXA@mail.gmail.com>
Date:   Mon, 11 Jul 2022 09:53:26 -0700
From:   Linus Torvalds <torvalds@...uxfoundation.org>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     chris@...essvector.net,
        "security@...nel.org" <security@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fix race between exit_itimers() and /proc/pid/timers

On Mon, Jul 11, 2022 at 9:16 AM Oleg Nesterov <oleg@...hat.com> wrote:
>
> As Chris explains, the comment above exit_itimers() is not correct,
> we can race with proc_timers_seq_ops. Change exit_itimers() to clear
> signal->posix_timers with ->siglock held.

Thanks. Applied,

                  Linus