5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
[ Upstream commit 5fed0be8583f08c1548b4dcd9e5ee0d1133d0730 ]
If the pinned file has a hole by partial truncation, application that has
the block map will be broken.
Reviewed-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Stable-dep-of: 278a6253a673 ("f2fs: fix to relocate check condition in f2fs_fallocate()")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/f2fs/file.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index da071ed11a3f6..959e1458412df 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1760,7 +1760,11 @@ static long f2fs_fallocate(struct file *file, int mode,
(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
return -EOPNOTSUPP;
- if (f2fs_compressed_file(inode) &&
+ /*
+ * Pinned file should not support partial trucation 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;
--
2.43.0
