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Date: Fri, 20 Apr 2012 11:10:10 +0800
From: Eugene Teo <>
To: "Eric W. Biederman" <>
Cc: Marcus Meissner <>, OSS Security List <>,, Sukadev Bhattiprolu <>, 
	Serge Hallyn <>, Pavel Emelyanov <>
Subject: Re: CVE request: pid namespace leak in kernel 3.0 and 3.1

> So we know what is holding the pid namespace reference.
> Additional thoughts.
> Does echo 3 > /proc/sys/vm/drop_caches clear up the issue?


> Is there a corresponding task_struct leak?


> I don't have much of a clue or much concern as this seems fixed in later kernels but I am happy to suggest things to look for to help narrow this down.

I'm helping to provide more information.

Thanks, Eugene

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