Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH 1/2] f2fs: compress: fix to relocate check condition in f2fs_{release,reserve}_compress_blocks() | Date | Sun, 7 Apr 2024 15:26:03 +0800 |
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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@unisoc.com> Closes: https://lore.kernel.org/linux-f2fs-devel/CAHJ8P3LdZXLc2rqeYjvymgYHr2+YLuJ0sLG9DdsJZmwO7deuhw@mail.gmail.com Signed-off-by: Chao Yu <chao@kernel.org> --- 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 2cd4ca8433e1..ca401cf8152a 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3549,9 +3549,6 @@ 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; @@ -3570,7 +3567,8 @@ 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; } @@ -3731,9 +3729,6 @@ 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; @@ -3745,7 +3740,8 @@ 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; } -- 2.40.1
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