tree 1cb6a0eb8080aea9acf8d5e338516ea17eaac2fb
parent 93156888115aa5a6e346c33b27ad6ba2894750fc
author Baokun Li <libaokun1@huawei.com> 1668657819 +0800
committer Oleksandr Tymoshenko <ovt@google.com> 1675272887 +0000

ext4: fix bad checksum after online resize

commit a408f33e895e455f16cf964cb5cd4979b658db7b upstream.

When online resizing is performed twice consecutively, the error message
"Superblock checksum does not match superblock" is displayed for the
second time. Here's the reproducer:

	mkfs.ext4 -F /dev/sdb 100M
	mount /dev/sdb /tmp/test
	resize2fs /dev/sdb 5G
	resize2fs /dev/sdb 6G

To solve this issue, we moved the update of the checksum after the
es->s_overhead_clusters is updated.

BUG=b/261872483,b/243947657
TEST=presubmit
RELEASE_NOTE=None

Fixes: 026d0d27c488 ("ext4: reduce computation of overhead during resize")
Fixes: de394a86658f ("ext4: update s_overhead_clusters in the superblock during an on-line resize")
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20221117040341.1380702-2-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Oleksandr Tymoshenko <ovt@google.com>
Change-Id: I539b9633567afd950515114df0352bbc2dc13090
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/41681
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Meena Shanmugam <meenashanmugam@google.com>