1 files changed, 2 insertions, 1 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f914b5db7ff1..1ae45bd9d27d 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -983,7 +983,8 @@ static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em)
                 return false;
 
         next = defrag_lookup_extent(inode, em->start + em->len);
-        if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE)
+        if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE ||
+            (em->block_start + em->block_len == next->block_start))
                 ret = false;
 
         free_extent_map(next);