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Date:	Tue, 26 Mar 2013 17:44:58 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	user-mode-linux-user@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: linux-v3.9-rc3: BUG: Bad page map in process trinity-child6 pte:002f9045
 pmd:29e421e1

On 03/25/2013 11:53 PM, Andrew Morton wrote:
> On Fri, 22 Mar 2013 18:28:36 +0100 Toralf F__rster <toralf.foerster@....de> wrote:
> 
>> > Using trinity I often trigger under a user mode linux image with host kernel 3.8.4
>> > and guest kernel linux-v3.9-rc3-244-g9217cbb the following :
>> > (The UML guest is a 32bit stable Gentoo Linux)
> I assume 3.8 is OK?
> 
With UML kernel 3.7.10 (host kernel still 3.8.4) I can trigger this
issue too.
Just to clarify it - here the bug appears in the UML kernel - the host
kernel is ok (I can of course crash a host kernel too by trinity'ing an
UML guest, but that's another thread - see [1])


FWIW he trinity command is just a test of 1 syscall:

$> trinity --children 1 --victims /mnt/nfs/n22/victims -c mremap



[1] https://lkml.org/lkml/2013/3/24/174

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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