linux-kernel - Re: kernel BUG in munlock_vma_pages

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Message-ID: <alpine.LRH.2.00.1312092215340.1515@twin.jikos.cz>
Date:	Mon, 9 Dec 2013 22:16:57 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Vlastimil Babka <vbabka@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>, joern@...fs.org,
	mgorman@...e.de, Michel Lespinasse <walken@...gle.com>,
	riel@...hat.com, LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: kernel BUG in munlock_vma_pages_range

On Mon, 9 Dec 2013, Sasha Levin wrote:

> Not really, the fuzzer hit it once and I've been unable to trigger it 
> again. 

If you are ever able to trigger it again, I think having crashdump 
available would be very helpful here, to see how exactly does the VMA/THP 
layout look like at the time of crash.

Any chance you run your fuzzing with crashkernel configured for a while?

-- 
Jiri Kosina
SUSE Labs

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