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....@unisoc.com>
Closes:
https://lore.kernel.org/linux-f2fs-devel/cahj8p3ldzxlc2rqeyjvymgyhr2+yluj0slg9ddsjzmwo7de...@mail.gmail.com
Signed-off-by: Chao Yu <c...@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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