Patch "f2fs: fix to relocate check condition in f2fs_fallocate()" has been added to the 5.15-stable tree

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

    f2fs: fix to relocate check condition in f2fs_fallocate()

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-fix-to-relocate-check-condition-in-f2fs_falloca.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 79d28ce4e068800ed06a18f1e47eaf4d94d5cd95
Author: Chao Yu <chao@xxxxxxxxxx>
Date:   Wed Apr 3 22:24:19 2024 +0800

    f2fs: fix to relocate check condition in f2fs_fallocate()
    
    [ Upstream commit 278a6253a673611dbc8ab72a3b34b151a8e75822 ]
    
    compress and pinfile flag should be checked after inode lock held to
    avoid race condition, fix it.
    
    Fixes: 4c8ff7095bef ("f2fs: support data compression")
    Fixes: 5fed0be8583f ("f2fs: do not allow partial truncation on pinned file")
    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 ffec3c5374f89..39002f3c3f8a7 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1760,15 +1760,6 @@ static long f2fs_fallocate(struct file *file, int mode,
 		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
 		return -EOPNOTSUPP;
 
-	/*
-	 * Pinned file should not support partial truncation since the block
-	 * can be used by applications.
-	 */
-	if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
-		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
-			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)))
-		return -EOPNOTSUPP;
-
 	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
 			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
 			FALLOC_FL_INSERT_RANGE))
@@ -1776,6 +1767,17 @@ static long f2fs_fallocate(struct file *file, int mode,
 
 	inode_lock(inode);
 
+	/*
+	 * Pinned file should not support partial truncation since the block
+	 * can be used by applications.
+	 */
+	if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
+		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
+			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
 	ret = file_modified(file);
 	if (ret)
 		goto out;




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