journal_tag_t has already counted the checksum size, however, for compatibility reason, we don't fix this bug and keep it as is. Signed-off-by: Wang Jianjian <wangjianjian0@xxxxxxxxxxx> --- fs/jbd2/journal.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index b6c114c11b97..b5e614818e8b 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2698,6 +2698,10 @@ size_t journal_tag_bytes(journal_t *journal) sz = sizeof(journal_block_tag_t); + /* + * journal_block_tag_t has already counted checksum size + * but for compatibility reason, we keep it as is. + */ if (jbd2_has_feature_csum2(journal)) sz += sizeof(__u16); -- 2.34.3
