diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 5b0d2c7..93f16c5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -522,6 +522,10 @@
 	if (unlikely(map->m_len > INT_MAX))
 		map->m_len = INT_MAX;
 
+	/* We can handle the block number less than EXT_MAX_BLOCKS */
+	if (unlikely(map->m_lblk >= EXT_MAX_BLOCKS))
+		return -EIO;
+
 	/* Lookup extent status tree firstly */
 	if (ext4_es_lookup_extent(inode, map->m_lblk, &es)) {
 		ext4_es_lru_add(inode);