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

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Message-ID: <18352.21524.186194.426982@harpo.it.uu.se>
Date:	Mon, 11 Feb 2008 14:56:36 +0100
From:	Mikael Pettersson <mikpe@...uu.se>
To:	Adrian Bunk <adrian.bunk@...ial.fi>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Riku Voipio <riku.voipio@...ial.fi>,
	Mikael Pettersson <mikpe@...uu.se>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: futex local DoS on most architectures

Adrian Bunk writes:
 > The issue described in [1] is still present and unfixed (and even the 
 > fix there wasn't complete since it didn't cover SMP).
 > 
 > Thanks to Riku Voipio for noting that it is still unfixed.
 > 
 > cu
 > Adrian
 > 
 > [1] http://lkml.org/lkml/2007/8/1/474

I think calling it a local DoS may make people take it
less seriously.

The problem is not related to attacks or malice.
It's NORMAL futex usage on the affected architectures
that's broken and will throw the kernel into a loop.

/Mikael
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