From: Jan Kara jack@suse.cz
mainline inclusion from mainline-v5.11-rc1 commit 81414b4dd48f596bf33e1b32c2e43e2047150ca6 category: bugfix bugzilla: 46758 CVE: NA
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Superblock is written out either through ext4_commit_super() or through ext4_handle_dirty_super(). In both cases we recompute the checksum so it is not necessary to recompute it after updating superblock free inodes & blocks counters.
Signed-off-by: Jan Kara jack@suse.cz Reviewed-by: Andreas Dilger adilger@dilger.ca Link: https://lore.kernel.org/r/20201127113405.26867-3-jack@suse.cz Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: Ye Bin yebin10@huawei.com Reviewed-by: zhangyi (F) yi.zhang@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- fs/ext4/super.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 18870ae874ab6..a254d7cf869ad 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4549,13 +4549,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) block = ext4_count_free_clusters(sb); ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); - ext4_superblock_csum_set(sb); err = percpu_counter_init(&sbi->s_freeclusters_counter, block, GFP_KERNEL); if (!err) { unsigned long freei = ext4_count_free_inodes(sb); sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); - ext4_superblock_csum_set(sb); err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, GFP_KERNEL); }