6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chao Yu <chao@xxxxxxxxxx> [ Upstream commit 7c5dffb3d90c5921b91981cc663e02757d90526e ] Compress flag should be checked after inode lock held to avoid racing w/ f2fs_setflags_common(), fix it. Fixes: 4c8ff7095bef ("f2fs: support data compression") Reported-by: Zhiguo Niu <zhiguo.niu@xxxxxxxxxx> Closes: https://lore.kernel.org/linux-f2fs-devel/CAHJ8P3LdZXLc2rqeYjvymgYHr2+YLuJ0sLG9DdsJZmwO7deuhw@xxxxxxxxxxxxxx Signed-off-by: Chao Yu <chao@xxxxxxxxxx> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/f2fs/file.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 7f631a617ee99..0350f36d043d6 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3488,9 +3488,6 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) if (!f2fs_sb_has_compression(sbi)) return -EOPNOTSUPP; - if (!f2fs_compressed_file(inode)) - return -EINVAL; - if (f2fs_readonly(sbi->sb)) return -EROFS; @@ -3509,7 +3506,8 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) goto out; } - if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + if (!f2fs_compressed_file(inode) || + is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { ret = -EINVAL; goto out; } @@ -3672,9 +3670,6 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) if (!f2fs_sb_has_compression(sbi)) return -EOPNOTSUPP; - if (!f2fs_compressed_file(inode)) - return -EINVAL; - if (f2fs_readonly(sbi->sb)) return -EROFS; @@ -3686,7 +3681,8 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) inode_lock(inode); - if (!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + if (!f2fs_compressed_file(inode) || + !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { ret = -EINVAL; goto unlock_inode; } -- 2.43.0