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Date: Tue, 14 Feb 2006 22:47:10 -0800
From: Andrew Morton <akpm@osdl.org>
To: Paul Jackson <pj@sgi.com>
Cc: Simon.Derr@bull.net, pj@sgi.com, linux-kernel@vger.kernel.org,
       clameter@sgi.com
Subject: Re: [PATCH] Cpuset: oops in exit on null cpuset fix
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Paul Jackson <pj@sgi.com> wrote:
>
>  Fix a latent bug in cpuset_exit() handling.  If a task tried
>  to allocate memory after calling cpuset_exit(), it oops'd in
>  cpuset_update_task_memory_state() on a NULL cpuset pointer.
> 
>  So set the exiting tasks cpuset to the root cpuset instead of
>  to NULL.
> 
>  A distro kernel hit this with an added kernel package that had
>  just such a hook (allocating memory) in the exit code path.

Seems strange to patch the kernel for this.  Can't the add-on patch do it? 
Or can we just move the cpuset_exit()s to later in the exit() paths?