linux-kernel - Re: perf_fuzzer crash on pentium 4

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Message-ID: <20140528135617.GA25750@amd.pavel.ucw.cz>
Date:	Wed, 28 May 2014 15:56:17 +0200
From:	Pavel Machek <pavel@....cz>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>
Subject: Re: perf_fuzzer crash on pentium 4

Hi!

> So just to be difficult I fired up the perf_fuzzer on a Pentium 4 machine.
> 
> It crashes more or less instantly (sorry for the line wrapping, 
> just got the serial console hooked up and don't have minicom configured 
> right yet).
> 
> this is 3.15-rc4 with the anti-memory corruption patch applied.
> 
> [   67.872274] BUG: unable to handle kernel NULL pointer dereference at 00000004
> [   67.876146] IP: [<ffffffff81013df2>] p4_pmu_schedule_events+0xa5/0x331

Pentium 4 's were not 64bit, were they?

									Pavel
-- 
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