linux-kernel - Re: [PATCH 2/2] fix the racy usage of task_lock(tsk->group_leader) in sys

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Message-ID: <20250914190122.GA23082@redhat.com>
Date: Sun, 14 Sep 2025 21:01:23 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Christian Brauner <brauner@...nel.org>,
	Jiri Slaby <jirislaby@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] fix the racy usage of task_lock(tsk->group_leader)
 in sys_prlimit64() paths

Too late for me, I'll write another email tomorrow, just one note for now...

On 09/14, Mateusz Guzik wrote:
>
> On Sun, Sep 14, 2025 at 1:11 PM Oleg Nesterov <oleg@...hat.com> wrote:
> >
> > Fixes: c022a0acad53 ("rlimits: implement prlimit64 syscall")
>
> I think this is more accurate:
> Fixes: 18c91bb2d872 ("prlimit: do not grab the tasklist_lock")

I'll re-check, but at first glance you are right... Thanks for taking
a look and correcting me!

Oleg.