5.15-stable review patch. If anyone has any objections, please let me know.
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From: Chao Yu chao@kernel.org
[ 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@unisoc.com Closes: https://lore.kernel.org/linux-f2fs-devel/CAHJ8P3LdZXLc2rqeYjvymgYHr2+YLuJ0sL... Signed-off-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@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 3d811594d0d5c..1a03d0f33549c 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3439,9 +3439,6 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) return -EOPNOTSUPP;
- if (!f2fs_compressed_file(inode)) - return -EINVAL; - if (f2fs_readonly(sbi->sb)) return -EROFS;
@@ -3460,7 +3457,8 @@ 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; } @@ -3618,9 +3616,6 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) return -EOPNOTSUPP;
- if (!f2fs_compressed_file(inode)) - return -EINVAL; - if (f2fs_readonly(sbi->sb)) return -EROFS;
@@ -3635,7 +3630,8 @@ 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; }