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

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commit c4d13222afd8a64bf11bc7ec68645496ee8b54b9 upstream.

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

Fixes: 783d948544 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chao Yu 2023-06-06 15:32:03 +08:00 committed by Greg Kroah-Hartman
parent e861961f3a
commit 029c6b106f
1 changed files with 4 additions and 1 deletions
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5
fs/ext4/ioctl.c
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@ -800,6 +800,7 @@ 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;
@ -818,7 +819,9 @@ 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;