Free the buffer head if the journal descriptor block fails checksum
verification.
This is the jbd2 port of the e2fsprogs patch "e2fsck: free bh on csum
verify error in do_one_pass".
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Cc: stable@vger.kernel.org
                            !jbd2_descr_block_csum_verify(journal,
                                                          bh->b_data)) {
                                err = -EIO;
+                               brelse(bh);
                                goto failed;
                        }