linux-ext4 - [Bug 14354] Bad corruption with 2.6.32-rc1 and upwards

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Message-Id: <200911082112.nA8LCia7003432@demeter.kernel.org>
Date:	Sun, 8 Nov 2009 21:12:44 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 14354] Bad corruption with 2.6.32-rc1 and upwards

http://bugzilla.kernel.org/show_bug.cgi?id=14354





--- Comment #184 from Theodore Tso <tytso@....edu>  2009-11-08 21:12:42 ---
> First off, it's slower. Secondly, 'l' is already 'strlen+1', so it looks 
> like ext4 _already_ copies the NUL terminating character.
> 
> So I suspect the debugging patch complained about writing a NUL to a 
> location that was already NUL to begin with.

Umm, yeah.  Good point.  Since the debugging patch marks the page ro,
short of doing a test before trying to null-terminate the symlink, the
debugging patch is always going to flag a false-positive here.

                              - Ted

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