The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

9b6641dd95a0 ("ext4: fix super block checksum incorrect after mount")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 9b6641dd95a0c441b277dd72ba22fed8d61f76ad Mon Sep 17 00:00:00 2001 From: Ye Bin yebin10@huawei.com Date: Wed, 25 May 2022 09:29:04 +0800 Subject: [PATCH] ext4: fix super block checksum incorrect after mount MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

We got issue as follows: [home]# mount /dev/sda test EXT4-fs (sda): warning: mounting fs with errors, running e2fsck is recommended [home]# dmesg EXT4-fs (sda): warning: mounting fs with errors, running e2fsck is recommended EXT4-fs (sda): Errors on filesystem, clearing orphan list. EXT4-fs (sda): recovery complete EXT4-fs (sda): mounted filesystem with ordered data mode. Quota mode: none. [home]# debugfs /dev/sda debugfs 1.46.5 (30-Dec-2021) Checksum errors in superblock! Retrying...

Reason is ext4_orphan_cleanup will reset ‘s_last_orphan’ but not update super block checksum.

To solve above issue, defer update super block checksum after ext4_orphan_cleanup.

Signed-off-by: Ye Bin yebin10@huawei.com Cc: stable@kernel.org Reviewed-by: Jan Kara jack@suse.cz Reviewed-by: Ritesh Harjani ritesh.list@gmail.com Link: https://lore.kernel.org/r/20220525012904.1604737-1-yebin10@huawei.com Signed-off-by: Theodore Ts'o tytso@mit.edu

diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b2ecae8adbfc..13d562d11235 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5302,14 +5302,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, GFP_KERNEL); } - /* - * Update the checksum after updating free space/inode - * counters. Otherwise the superblock can have an incorrect - * checksum in the buffer cache until it is written out and - * e2fsprogs programs trying to open a file system immediately - * after it is mounted can fail. - */ - ext4_superblock_csum_set(sb); if (!err) err = percpu_counter_init(&sbi->s_dirs_counter, ext4_count_dirs(sb), GFP_KERNEL); @@ -5367,6 +5359,14 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; ext4_orphan_cleanup(sb, es); EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; + /* + * Update the checksum after updating free space/inode counters and + * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect + * checksum in the buffer cache until it is written out and + * e2fsprogs programs trying to open a file system immediately + * after it is mounted can fail. + */ + ext4_superblock_csum_set(sb); if (needs_recovery) { ext4_msg(sb, KERN_INFO, "recovery complete"); err = ext4_mark_recovery_complete(sb, es);