linux-kernel - Re: perf: perf_fuzzer lockup in perf_cgroup

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Message-ID: <20160915072425.GN5008@twins.programming.kicks-ass.net>
Date:   Thu, 15 Sep 2016 09:24:25 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Stephane Eranian <eranian@...gle.com>
Cc:     Vince Weaver <vincent.weaver@...ne.edu>,
        LKML <linux-kernel@...r.kernel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ingo Molnar <mingo@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: perf: perf_fuzzer lockup in perf_cgroup_attach

On Wed, Sep 14, 2016 at 10:35:49PM -0700, Stephane Eranian wrote:
> On Wed, Sep 14, 2016 at 7:43 PM, Vince Weaver <vincent.weaver@...ne.edu> wrote:
> >
> > so the skylake that was fuzzing finally is mostly locked up.
> >
> > Really hard to tell what's going, especially as KASLR made looking up the
> > addresses a big pain.
> >
> I would think there is a way to disable KASLR for this kind of testing!

I always kill CONFIG_RANDOMIZE_BASE, but there's also talk of killing
the address print entirely..  :-(

  https://lkml.kernel.org/r/20160831165303.tvcudt7wkpechuqt@treble