linux-kernel - Re: perf: hard fuzzer crash on 4.8-rc1

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Message-ID: <20160808201219.GE30192@twins.programming.kicks-ass.net>
Date:	Mon, 8 Aug 2016 22:12:19 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: perf: hard fuzzer crash on 4.8-rc1

On Mon, Aug 08, 2016 at 03:57:05PM -0400, Vince Weaver wrote:
> On Mon, 8 Aug 2016, Peter Zijlstra wrote:
> 
> > On Mon, Aug 08, 2016 at 01:57:28PM -0400, Vince Weaver wrote:
> > > 
> > > [  637.250130] BUG: unable to handle kernel
> > > 
> > > About 10 times of triggering this, this is all I get.  Machine is fairly
> > > thoroughly locked at that point.
> > > 
> > > Any advice on how to debug this more?
> > 
> > I have this pending:
> > 
> >  lkml.kernel.org/r/20160804123724.GN6862@...ns.programming.kicks-ass.net
> > 
> > If that's not it, I'll go prod tomorrow.
> 
> yes, that patch seems to fix the issue.

Awesome, I'll add a tested-by from you.