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Date: Fri, 15 Jun 2012 11:42:03 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Wagin <avagin@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Cyrill Gorcunov <gorcunov@openvz.org>,
        Pavel Emelyanov <xemul@openvz.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: general protection fault on finalizing task
Message-ID: <20120615094202.GA16768@redhat.com>
References: <CANaxB-xyBw+O9h7OrFRNM93+Gp+GX63C-OgOZ2ZK2QbKMDBJ7g@mail.gmail.com> <20120614160129.GA3433@redhat.com> <CANaxB-z3Jho4vjRcG30mECYO+CdjwHXX7TmvxCy2A8rp2J7AOA@mail.gmail.com>
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Hi Andrew,

Thanks lot for testing, I guess we need these fixes in 3.5

But I am puzzled...

On 06/15, Andrew Wagin wrote:
>
> FYI: I bisected this problem.
>
> # git bisect bad
> Bisecting: 0 revisions left to test after this (roughly 0 steps)
> [3208450488ae724196f1efffc457e4265957c04e] pidns: use
> task_active_pid_ns in do_notify_parent
>
> commit 3208450488ae724196f1efffc457e4265957c04e
> Author: Eric W. Biederman <ebiederm@xmission.com>
> Date:   Thu May 31 16:26:39 2012 -0700
>
>     pidns: use task_active_pid_ns in do_notify_parent

Impossible ;) I think. I'd say it should be the next change

	00c10bc13cdb58447d6bb2a003afad7bd60f5a5f
	"pidns: make killed children autoreap"

which is fine by itself, but makes the problem (hopefully fixed
by -mm patches) more visible.

Oleg.