linux-kernel - Re: [PATCH 01/14] vmscan: Fix mapping use after free

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Message-ID: <20100629144443.GD10513@cmpxchg.org>
Date:	Tue, 29 Jun 2010 16:44:43 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>, Rik van Riel <riel@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH 01/14] vmscan: Fix mapping use after free

On Tue, Jun 29, 2010 at 12:34:35PM +0100, Mel Gorman wrote:
> From: Nick Piggin <npiggin@...e.de>
> 
> Use lock_page_nosync in handle_write_error as after writepage we have no
> reference to the mapping when taking the page lock.
> 
> Signed-off-by: Nick Piggin <npiggin@...e.de>
> Signed-off-by: Mel Gorman <mel@....ul.ie>

Reviewed-by: Johannes Weiner <hannes@...xchg.org>
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