linux-kernel - Re: [PATCH] ext4 Fix setting random pages PageUptodate

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Message-ID: <20101116203854.GA1568@thunk.org>
Date:	Tue, 16 Nov 2010 15:38:54 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	Hugh Dickins <hughd@...gle.com>, Christoph Lameter <cl@...ux.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4 Fix setting random pages PageUptodate

On Tue, Nov 16, 2010 at 12:13:39PM +0100, Markus Trippelsdorf wrote:
> ext4_end_bio calls put_page and kmem_cache_free before calling
> SetPageUpdate(). This can result in setting the PageUptodate bit on
> random pages and causes the following BUG:

Oops.   Thanks muchly to you and to Hugh for discovering this.

I've added this to the ext4 patch queue and will be pushing to Linus
this week, for -rc3.

					- Ted
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