jbd2: fix invalid descriptor block checksum
authorluojiajun <luojiajun3@huawei.com>
Fri, 1 Mar 2019 05:30:00 +0000 (00:30 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Fri, 1 Mar 2019 05:30:00 +0000 (00:30 -0500)
commit6e876c3dd205d30b0db6850e97a03d75457df007
tree39e5b66c43ceb457c42bf71e60afe570b9d9d388
parent7bd75230b43727b258a4f7a59d62114cffe1b6c8
jbd2: fix invalid descriptor block checksum

In jbd2_journal_commit_transaction(), if we are in abort mode,
we may flush the buffer without setting descriptor block checksum
by goto start_journal_io. Then fs is mounted,
jbd2_descriptor_block_csum_verify() failed.

[  271.379811] EXT4-fs (vdd): shut down requested (2)
[  271.381827] Aborting journal on device vdd-8.
[  271.597136] JBD2: Invalid checksum recovering block 22199 in log
[  271.598023] JBD2: recovery failed
[  271.598484] EXT4-fs (vdd): error loading journal

Fix this problem by keep setting descriptor block checksum if the
descriptor buffer is not NULL.

This checksum problem can be reproduced by xfstests generic/388.

Signed-off-by: luojiajun <luojiajun3@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
fs/jbd2/commit.c