linux-kernel - Re: [PATCH] pids: make task_tgid_nr

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Message-ID: <CA+55aFx4LrqTyhn32oSRUCgOaKeAxA4VrL8n7Fke8AQJYkhXSQ@mail.gmail.com>
Date:   Mon, 21 Aug 2017 12:49:32 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Troy Kensinger <tkensinger@...gle.com>,
        "security@...nel.org" <security@...nel.org>,
        Paul McKenney <paulmck@...ux.vnet.ibm.com>,
        Josh Triplett <josh@...htriplett.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] pids: make task_tgid_nr_ns() safe

On Mon, Aug 21, 2017 at 8:35 AM, Oleg Nesterov <oleg@...hat.com> wrote:
>
> We really need to change __unhash_process() to nullify group_leader,
> parent, and real_parent, but this needs some cleanups. Until then we
> can turn task_tgid_nr_ns() into another user of __task_pid_nr_ns() and
> fix the problem.

Applied.

Should it perhaps have had a "Cc: stable" on it? I didn't do so, but
it might be worth pointing Greg at this explicitly (dd1c1f2f2028
"pids: make task_tgid_nr_ns() safe").

I haven't pushed it out yet, it's going through my usual build first,
but it's in my tree.

                 Linus