diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 43defea9ab20f00e00fe3bbf6dd23590f1b2a24c..3419f5e72bf971164b4d6f74b69fcc5b42185972 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2897,6 +2897,9 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 len,
 	if (src == dst)
 		return -EINVAL;
 
+	if (len == 0)
+		return 0;
+
 	btrfs_double_lock(src, loff, dst, dst_loff, len);
 
 	ret = extent_same_check_offsets(src, loff, len);