linux-kernel - Re: perf: fuzzer KASAN: global-out-of-bounds in match

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Message-ID: <20161118082436.GA6992@gmail.com>
Date:   Fri, 18 Nov 2016 09:24:36 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Vince Weaver <vincent.weaver@...ne.edu>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        "dvyukov@...gle.com" <dvyukov@...gle.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: perf: fuzzer KASAN: global-out-of-bounds in match_token


* Vince Weaver <vincent.weaver@...ne.edu> wrote:

> On Thu, 17 Nov 2016, Vince Weaver wrote:
> 
> > On Thu, 17 Nov 2016, Vince Weaver wrote:
> > > > 
> > > > [  911.507365] ==================================================================
> > > > [  911.514824] BUG: KASAN: global-out-of-bounds in match_token+0x268/0x310 at addr ffffffffb14ad058
> > > > [  911.523912] Read of size 8 by task perf_fuzzer/20662
> > > > [  911.528945] Address belongs to variable if_tokens+0x78/0xa0
> 
> I managed to create a short reproducer that reliably causes the issue on 
> my skylake test machine.

Awesome, thanks a lot Vince!

	Ingo