[PATCH] fuse: set ff->flock only on success

[Zhang Tianci]

If FUSE_SETLK fails (e.g., due to EWOULDBLOCK), we shall not set
FUSE_RELEASE_FLOCK_UNLOCK in fuse_file_release().

Reported-by: Li Yichao <liyichao.1@xxxxxxxxxxxxx>
Signed-off-by: Zhang Tianci <zhangtianci.1997@xxxxxxxxxxxxx>
---
 fs/fuse/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 01bc894e9c2ba..d83ef81e3b9b3 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2563,8 +2563,9 @@ static int fuse_file_flock(struct file *file, int cmd, struct file_lock *fl)
 		struct fuse_file *ff = file->private_data;
 
 		/* emulate flock with POSIX locks */
-		ff->flock = true;
 		err = fuse_setlk(file, fl, 1);
+		if (!err)
+			ff->flock = true;
 	}
 
 	return err;
-- 
2.39.5