From 6e876c3dd205d30b0db6850e97a03d75457df007 Mon Sep 17 00:00:00 2001
From: luojiajun <luojiajun3@huawei.com>
Date: Fri, 1 Mar 2019 00:30:00 -0500
Subject: [PATCH] jbd2: fix invalid descriptor block checksum
Git-commit: 6e876c3dd205d30b0db6850e97a03d75457df007
Patch-mainline: v5.1-rc1
References: bsc#1212987
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>
Acked-by: Jan Kara <jack@suse.cz>
---
fs/jbd2/commit.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 2eb55c3361a8..efd0ce9489ae 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -694,9 +694,11 @@ void jbd2_journal_commit_transaction(journal_t *journal)
the last tag we set up. */
tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG);
-
- jbd2_descriptor_block_csum_set(journal, descriptor);
start_journal_io:
+ if (descriptor)
+ jbd2_descriptor_block_csum_set(journal,
+ descriptor);
+
for (i = 0; i < bufs; i++) {
struct buffer_head *bh = wbuf[i];
/*
--
2.35.3