+++ This bug was initially created as a clone of Bug #450770 +++
This is very rare but also obvious enough I think it's worth fixing up.
From: Duane Griffin <firstname.lastname@example.org>
Date: Thu, 20 Mar 2008 00:00:53 +0000 (-0700)
Subject: jbd: correctly unescape journal data blocks
jbd: correctly unescape journal data blocks
Fix a long-standing typo (predating git) that will cause data corruption if a
journal data block needs unescaping. At the moment the wrong buffer head's
data is being unescaped.
To test this case mount a filesystem with data=journal, start creating and
deleting a bunch of files containing only JFS_MAGIC_NUMBER (0xc03b3998), then
pull the plug on the device. Without this patch the files will contain zeros
instead of the correct data after recovery.
Signed-off-by: Duane Griffin <email@example.com>
Acked-by: Jan Kara <firstname.lastname@example.org>
Signed-off-by: Andrew Morton <email@example.com>
Signed-off-by: Linus Torvalds <firstname.lastname@example.org>
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
Oops, Josef did this already.
*** This bug has been marked as a duplicate of 447741 ***