linux-kernel - Re: perf_fuzzer crash on pentium 4

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Message-ID: <20140507165811.GG1444@moon>
Date:	Wed, 7 May 2014 20:58:11 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: perf_fuzzer crash on pentium 4

On Wed, May 07, 2014 at 08:49:02PM +0400, Cyrill Gorcunov wrote:
> On Wed, May 07, 2014 at 12:46:24PM -0400, Vince Weaver wrote:
> > 
> > sorry for the delay, I like to compile kernels locally and it takes a 
> > really long time to build a ftrace-enabled kernel on a pentium 4 it seems.
> > 
> > Anyway I threw some printks in, and this is what I get:
> > 
> > [  447.572626] VMW: bind=NULL config=6b6b6b6b6b6b6b6b
> > 
> > I have slab poisoning turned on.  Use after free?
> 
> Looks so. It's list poison iirc, thus i think it comes from upper level,
> ie from perf general code.

Vince, I'm trying to figure out where it might come from, but no
ideas yet.
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