Re: mm: BUG in mempolicy's sp_insert

From: Sasha Levin
Date: Mon Feb 25 2013 - 20:55:23 EST

On 02/25/2013 08:52 PM, KOSAKI Motohiro wrote:
> On Mon, Feb 25, 2013 at 8:30 AM, Sasha Levin <sasha.levin@xxxxxxxxxx> wrote:
>> Hi all,
>> While fuzzing with trinity inside a KVM tools guest running latest -next kernel,
>> I've stumbled on the following BUG:
>> [13551.830090] ------------[ cut here ]------------
>> [13551.830090] kernel BUG at mm/mempolicy.c:2187!
>> [13551.830090] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> Unfortunately, I didn't reproduce this. I'll try it tonight.

I've actually managed to reproduce it again since then, so it's not a one time
fluke (which is a good sign a I guess).

It did require about an hour of fuzzing just mm with trinity.


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