linux-kernel - Re: perf: perf_fuzzer triggers GPF in perf_prepare

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Message-ID: <20181205163838.GA3836@krava>
Date:   Wed, 5 Dec 2018 17:38:38 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Vince Weaver <vincent.weaver@...ne.edu>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: perf: perf_fuzzer triggers GPF in perf_prepare_sample

On Wed, Dec 05, 2018 at 01:45:38PM +0100, Jiri Olsa wrote:
> On Tue, Dec 04, 2018 at 10:54:55AM -0500, Vince Weaver wrote:
> > Hello,
> > 
> > I was able to trigger another oops with the perf_fuzzer with current git.
> > 
> > This is 4.20-rc5 after the fix for the very similar oops I previously 
> > reported got committed.
> > 
> > It seems to be pointing to the same location in the source as 
> > before, I guess maybe triggered a different way?
> 
> nice.. yep, looks the same
> 
> > 
> > Unfortunately this crash is not easily reproducible like the last one was.
> 
> will check

what model are hitting this on?

jirka