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

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Message-ID: <87sghmnckn.fsf@x220.int.ebiederm.org>
Date:   Wed, 01 Apr 2020 16:03:20 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Linus Torvalds <torvalds@...ux-foundation.org>
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

Linus Torvalds <torvalds@...ux-foundation.org> writes:

> 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.

Done

Eric