linux-kernel - RE: perf: fuzzer KASAN slab-out-of-bounds in snb_uncore_imc_event

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Message-ID: <alpine.DEB.2.20.1611151237210.31288@macbook-air>
Date:   Tue, 15 Nov 2016 12:38:55 -0500 (EST)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     "Liang, Kan" <kan.liang@...el.com>
cc:     Peter Zijlstra <peterz@...radead.org>,
        Vince Weaver <vincent.weaver@...ne.edu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        "davej@...emonkey.org.uk" <davej@...emonkey.org.uk>,
        "dvyukov@...gle.com" <dvyukov@...gle.com>,
        Stephane Eranian <eranian@...il.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.

Vince