linux-ext4 - Re: [PATCH] ext3: htree entry integrity checking

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Message-ID: <20061116222747.GT6012@schatzie.adilger.int>
Date:	Thu, 16 Nov 2006 15:27:47 -0700
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Jeff Mahoney <jeffm@...freymahoney.com>
Cc:	linux-fsdevel@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ext4@...r.kernel.org, Eric Sandeen <esandeen@...hat.com>
Subject: Re: [PATCH] ext3: htree entry integrity checking

On Nov 16, 2006  11:50 -0500, Jeff Mahoney wrote:
>  Currently, if a corrupted directory entry with rec_len=0 is encountered,
>  we still trust that the data is valid. This can cause an infinite loop
>  in htree_dirblock_to_tree() since the iteration loop will never make any
>  progress.

Actually, I think Eric Sandeen was working on similar fixes already, and
instead of doing a per-item check each time we look at the entry it does
a full-block check the first time it is read (as ext2 does).

>  This fixes the problem described at:
>  http://projects.info-pull.com/mokb/MOKB-10-11-2006.html

Would also be good to CC linux-ext4, where the ext3 maintainers live.
Hmm, maybe we need to update MAINTAINERS with the new list address?

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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