Patch "f2fs: compress: fix to relocate check condition in f2fs_{release,reserve}_compress_blocks()" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    f2fs: compress: fix to relocate check condition in f2fs_{release,reserve}_compress_blocks()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     f2fs-compress-fix-to-relocate-check-condition-in-f2f.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 6aad40155cff89106d60dad7b17de4fa884c1640
Author: Chao Yu <chao@xxxxxxxxxx>
Date:   Sun Apr 7 15:26:03 2024 +0800

    f2fs: compress: fix to relocate check condition in f2fs_{release,reserve}_compress_blocks()
    
    [ 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>

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;
 	}