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Date: Wed, 28 May 2014 18:06:32 +0400
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Vince Weaver <vincent.weaver@maine.edu>, linux-kernel@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>
Subject: Re: perf_fuzzer crash on pentium 4
Message-ID: <20140528140632.GH2570@moon>
References: <alpine.DEB.2.10.1405061137560.3220@vincent-weaver-1.umelst.maine.edu>
 <20140528135617.GA25750@amd.pavel.ucw.cz>
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On Wed, May 28, 2014 at 03:56:17PM +0200, Pavel Machek wrote:
> 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?

Not all, but there were 64bit varians (Xeons iirc).