linux-kernel - Re: [PATCH] signal: Extend exec

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Date:   Wed, 1 Apr 2020 13:55:11 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Adam Zabrocki <pi3@....com.pl>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        Jann Horn <jannh@...gle.com>, Oleg Nesterov <oleg@...hat.com>,
        Andy Lutomirski <luto@...capital.net>,
        Bernd Edlinger <bernd.edlinger@...mail.de>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] signal: Extend exec_id to 64bits

On Wed, Apr 1, 2020 at 1:50 PM Eric W. Biederman <ebiederm@...ssion.com> wrote:
>
> I have updated the update of exec_id on exec to use WRITE_ONCE
> and the read of exec_id in do_notify_parent to use READ_ONCE
> to make it clear that there is no locking between these two
> locations.

Ack, makes sense to me.

Just put it in your branch, this doesn't look urgent, considering that
it's something that has been around forever.

            Linus