1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a990a9045139..ed3ba55f65ac 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3488,6 +3488,8 @@ static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 olen,
                         const u64 sz = BTRFS_I(src)->root->fs_info->sectorsize;
 
                         len = round_down(i_size_read(src), sz) - loff;
+                        if (len == 0)
+                                return 0;
                         olen = len;
                 }
         }