From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Thu, 11 Sep 2014 15:44:36 +0000 (-0400)
Subject: ext4: validate external journal superblock checksum
X-Git-Tag: fixes-against-v3.18-rc2~28^2~25
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df4763bea5b04d8eed941cfe3df51f22cfe95570;p=pandora-kernel.git

ext4: validate external journal superblock checksum

If the external journal device has metadata_csum enabled, verify
that the superblock checksum matches the block before we try to
mount.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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