[PATCH 5.19 133/717] ext4: fix miss release buffer head in ext4_fc_write_inode

Greg Kroah-Hartman
2022-10-22T07:46:01Z

From: Ye Bin <yebin10@huawei.com>

commit ccbf8eeb39f2ff00b54726a2b20b35d788c4ecb5 upstream.

In 'ext4_fc_write_inode' function first call 'ext4_get_inode_loc' get 'iloc',
after use it miss release 'iloc.bh'.
So just release 'iloc.bh' before 'ext4_fc_write_inode' return.

Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220914100859.1415196-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ext4/fast_commit.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)

--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -874,22 +874,25 @@ static int ext4_fc_write_inode(struct in
tl.fc_tag = cpu_to_le16(EXT4_FC_TAG_INODE);
tl.fc_len = cpu_to_le16(inode_len + sizeof(fc_inode.fc_ino));

+ ret = -ECANCELED;
dst = ext4_fc_reserve_space(inode->i_sb,
sizeof(tl) + inode_len + sizeof(fc_inode.fc_ino), crc);
if (!dst)
- return -ECANCELED;
+ goto err;

if (!ext4_fc_memcpy(inode->i_sb, dst, &tl, sizeof(tl), crc))
- return -ECANCELED;
+ goto err;
dst += sizeof(tl);
if (!ext4_fc_memcpy(inode->i_sb, dst, &fc_inode, sizeof(fc_inode), crc))
- return -ECANCELED;
+ goto err;
dst += sizeof(fc_inode);
if (!ext4_fc_memcpy(inode->i_sb, dst, (u8 *)ext4_raw_inode(&iloc),
inode_len, crc))
- return -ECANCELED;
-
- return 0;
+ goto err;
+ ret = 0;
+err:
+ brelse(iloc.bh);
+ return ret;
}

/*