linux-kernel - Re: [testcase] perf: yet another fuzzer triggered crash

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Date:	Fri, 28 Jun 2013 17:07:38 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Vince Weaver <vincent.weaver@...ne.edu>
cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	trinity@...r.kernel.org
Subject: Re: [testcase] perf: yet another fuzzer triggered crash

On Fri, 28 Jun 2013, Vince Weaver wrote:

> On Fri, 14 Jun 2013, Vince Weaver wrote:
>  
> > OK, I haven't managed to get a small reproducible test case for the system 
> > crash yet
> 
> I wasted the last 2 days bisecting a 10000 syscall trace, but below is a 
> 20-syscall testcase that rapidly makes a core2 machine running 3.10-rc7 
> unusable.

and it turns out I might have bisected down too much, as though that 
crashes my core2 system it doesn't crash newer machines.

I'm too lazy to re-bisect today, but the much longer program here:
   http://web.eece.maine.edu/~vweaver/files/nmi_bug_snb.c
reliably causes the same crash on a Sandybridge machine I have running 3.9

Vince Weaver
vincent.weaver@...ne.edu
http://www.eece.maine.edu/~vweaver/
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