1 files changed, 3 insertions, 0 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 43defea9ab20..3419f5e72bf9 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);