linux-kernel - perf: perf_fuzzer triggers instant reboot

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Date:	Mon, 8 Sep 2014 13:47:11 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	linux-kernel@...r.kernel.org
cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: perf: perf_fuzzer triggers instant reboot

Hello

so I finally had time to run my perf_fuzzer again and it has rapidly 
turned up an alarming crash that instant-reboots my core2 test machine.

This is on 3.17-rc4.  It is reproducible.

The first time all that appeared on the serial console was:

[ 2616.535995] Kernel panic - not syncing: Lost physical address for unconsumed uncorrectable error

The second time this happened instead:

[  756.009271] traps: perf_fuzzer[4236] trap invalid opcode ip:4044c0 sp:7fffb0ed6f90 error:0
[  756.017590] BUG: unable to handle kernel paging request

I'll work on trying to narrow this down a bit.

Vince
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