1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 5b0d2c7d5408..93f16c5e8a8e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -522,6 +522,10 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
         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);