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Subject: Re: [patch-final] Re: patch] cpusets, cgroups: disallow attaching
 kthreadd
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Mike Galbraith <efault@gmx.de>
Cc: Paul Menage <paul@paulmenage.org>, LKML <linux-kernel@vger.kernel.org>,
        Tejun Heo <htejun@gmail.com>, Li Zefan <lizf@cn.fujitsu.com>,
        David Rientjes <rientjes@google.com>
Date: Wed, 19 Oct 2011 09:54:32 +0200
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On Wed, 2011-10-19 at 07:24 +0200, Mike Galbraith wrote:
> Thanks.  Ok, seems it is decided that this is the best way to deal with
> annoying corner-case.  For convenience, patch with acquired acks below.
> 

Ah, but I'm not rolling over that easily ;-)

I really think that if we want to restrain userspace from doing
something stupid we might as well do something that makes sense, and
that is mandate kthreadd stays in the root group at all times for
everybody.