From: Chao Yu chao@kernel.org
[ Upstream commit c4d13222afd8a64bf11bc7ec68645496ee8b54b9 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ext4/ioctl.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 1171618f6549a..56829507e68c8 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -612,6 +612,7 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg) { struct ext4_sb_info *sbi = EXT4_SB(sb); __u32 flags; + struct super_block *ret;
if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -630,7 +631,9 @@ 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 (IS_ERR(ret)) + return PTR_ERR(ret); set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); thaw_bdev(sb->s_bdev, sb); break;