linux-kernel - Re: futex local DoS on most architectures

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Message-ID: <alpine.LFD.1.00.0802150216350.12988@apollo.tec.linutronix.de>
Date:	Fri, 15 Feb 2008 02:19:13 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	adrian.bunk@...ial.fi, mingo@...e.hu, linux-kernel@...r.kernel.org,
	riku.voipio@...ial.fi, mikpe@...uu.se, buytenh@...tstofly.org,
	rusty@...tcorp.com.au, stable@...nel.org
Subject: Re: futex local DoS on most architectures

On Thu, 14 Feb 2008, Andrew Morton wrote:
> > This patch is intended for easy backporting and needs to be cleaned up
> > further for current mainline.
> 
> So...
> 
> I queued up this version with a cc to stable under the assumption that this
> is the patch which should be applied to 2.6.x.y, but this version is not
> the one which will go into 2.6.25.
> 
> Correct?
> 
> If so: messy.  The stable guys might want to wait until they see the real
> 2.6.25 patch and perhaps prefer to backport that version.

Yup. I worked out a sane solution, which allows runtime detection. The
compile time solution is not perfect, as there is already arch code
which checks cpu features on runtime.

Patches follow in separate mail.

Thanks,
	tglx

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