diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 372b2cb..0793a13 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3626,6 +3626,10 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
 						 path, map->m_len);
 		} else
 			err = ret;
+		map->m_flags |= EXT4_MAP_MAPPED;
+		if (allocated > map->m_len)
+			allocated = map->m_len;
+		map->m_len = allocated;
 		goto out2;
 	}
 	/* buffered IO case */