FAILED: patch "[PATCH] ext4: fix to check return value of freeze_bdev() in" failed to apply to 5.4-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.4-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>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y
git checkout FETCH_HEAD
git cherry-pick -x c4d13222afd8a64bf11bc7ec68645496ee8b54b9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2023072652-selector-hangover-e9ed@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

c4d13222afd8 ("ext4: fix to check return value of freeze_bdev() in ext4_shutdown()")

thanks,

greg k-h

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

From c4d13222afd8a64bf11bc7ec68645496ee8b54b9 Mon Sep 17 00:00:00 2001
From: Chao Yu <chao@kernel.org>
Date: Tue, 6 Jun 2023 15:32:03 +0800
Subject: [PATCH] ext4: fix to check return value of freeze_bdev() in
 ext4_shutdown()

freeze_bdev() can fail due to a lot of reasons, it needs to check its
reason before later process.

Fixes: 783d94854499 ("ext4: add EXT4_IOC_GOINGDOWN ioctl")
Cc: stable@kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230606073203.1310389-1-chao@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index f9a430152063..55be1b8a6360 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -797,6 +797,7 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	__u32 flags;
+	int ret;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
@@ -815,7 +816,9 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 
 	switch (flags) {
 	case EXT4_GOING_FLAGS_DEFAULT:
-		freeze_bdev(sb->s_bdev);
+		ret = freeze_bdev(sb->s_bdev);
+		if (ret)
+			return ret;
 		set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 		thaw_bdev(sb->s_bdev);
 		break;