1 files changed, 5 insertions, 0 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 3419f5e72bf9..97b782ff92bb 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3631,6 +3631,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
         if (off + len == src->i_size)
                 len = ALIGN(src->i_size, bs) - off;
 
+        if (len == 0) {
+                ret = 0;
+                goto out_unlock;
+        }
+
         /* verify the end result is block aligned */
         if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) ||
             !IS_ALIGNED(destoff, bs))