linux-ext4 - Re: [PATCH 16/24] e2fsck: don't crash during rehash

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Message-ID: <20140725112216.GG1865@thunk.org>
Date:	Fri, 25 Jul 2014 07:22:16 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 16/24] e2fsck: don't crash during rehash

On Fri, Jul 18, 2014 at 03:54:15PM -0700, Darrick J. Wong wrote:
> If a user crafts a carefully constructed filesystem containing a
> single directory entry block with an invalid checksum and fewer than
> two entries, and then runs e2fsck to fix the filesystem, fsck will
> crash when it tries to "compress" the short dir and passes a negative
> dirent array length to qsort.  Therefore, don't allow directory
> "compression" in this situation.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>

Thanks, applied.

				- Ted
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