linux-kernel - Re: [PATCH] cpuset: make ntasks to be a monotonic increasing value

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Message-ID: <48916557.8070508@cn.fujitsu.com>
Date:	Thu, 31 Jul 2008 15:10:15 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Jackson <pj@....com>, Paul Menage <menage@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpuset: make ntasks to be a monotonic increasing value

Lai Jiangshan wrote:
> ntasks is not a monotonic increasing value,
> So maybe fudge+1 processes are created when kmalloc and killed
> when kfree in every loop. And the loop will not end or
> repetition a long time.
> 
> This patch prevent this kind of attack.
> 

Could you demonstrate how to manage to do this so-called attack in
real-life?

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