From: "Liang, Kan" <kan.liang@intel.com>
To: Vince Weaver <vincent.weaver@maine.edu>
CC: Peter Zijlstra <peterz@infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        "Arnaldo Carvalho de Melo" <acme@kernel.org>,
        "davej@codemonkey.org.uk" <davej@codemonkey.org.uk>,
        "dvyukov@google.com" <dvyukov@google.com>,
        Stephane Eranian <eranian@gmail.com>
Subject: RE: perf: fuzzer KASAN slab-out-of-bounds in
 snb_uncore_imc_event_del
Thread-Topic: perf: fuzzer KASAN slab-out-of-bounds in
 snb_uncore_imc_event_del
Thread-Index: AQHSPxWB0DPNSwBXtUqA0AWmqeHb66DZBgaAgACH/ICAALYycP//hcqAgACQokA=
Date: Tue, 15 Nov 2016 18:18:02 +0000
Message-ID: <37D7C6CF3E00A74B8858931C1DB2F07750CA0000@SHSMSX103.ccr.corp.intel.com>
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> -----Original Message-----
> From: Vince Weaver [mailto:vincent.weaver@maine.edu]
> Sent: Tuesday, November 15, 2016 12:39 PM
> To: Liang, Kan <kan.liang@intel.com>
> Cc: Peter Zijlstra <peterz@infradead.org>; Vince Weaver
> <vincent.weaver@maine.edu>; linux-kernel@vger.kernel.org; Ingo Molnar
> <mingo@redhat.com>; Arnaldo Carvalho de Melo <acme@kernel.org>;
> davej@codemonkey.org.uk; dvyukov@google.com; Stephane Eranian
> <eranian@gmail.com>
> Subject: RE: perf: fuzzer KASAN slab-out-of-bounds in
> snb_uncore_imc_event_del
> 
> On Tue, 15 Nov 2016, Liang, Kan wrote:
> 
> > For client IMC, there is no generic counters.
> > Current implementation defines its own fixed free running counters.
> > event_list and n_events are unused.
> > I think we can just remove them.
> >
> > Vince, could you please try the patch as below?
> >
> 
> With this patch I have not been able to trigger the imc/uncore issue.
> 
> Or at least I used to be able to trigger it within 5 minutes, now I go longer
> (maybe 10 minutes) before hitting an unrelated issue.
> 

Thanks a lot for the test.
I will submit the patch then.

Thanks,
Kan