linux-kernel - Re: [PATCH] fork: fix copy_process(CLONE_PARENT) race with the exiting ->real

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Message-ID: <CAHk-=whjyOuO-xwov7UWidBOkWyZv84TVA18hBb01V-hiML+yg@mail.gmail.com>
Date:   Sun, 8 Nov 2020 11:19:14 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Eddy Wu <itseddy0402@...il.com>
Cc:     Oleg Nesterov <oleg@...hat.com>,
        Security Officers <security@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        eddy_wu@...ndmicro.com
Subject: Re: [PATCH] fork: fix copy_process(CLONE_PARENT) race with the
 exiting ->real_parent

On Fri, Nov 6, 2020 at 10:47 PM Eddy Wu <itseddy0402@...il.com> wrote:
>
> current->group_leader->exit_signal may change during copy_process() if
> current->real_parent exits, move the assignment inside tasklist_lock to avoid
> the race.

Applied. Thanks,

           Linus