Check return value of record_info_for_database()

Currently we will have an assertion failure if this happens, but we're thinking of removing that.
maxmind · Nov 2, 2023 · 30853b1 · 30853b1
1 parent 83758e5
commit 30853b1
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/maxminddb.c b/src/maxminddb.c
@@ -1009,6 +1009,9 @@ static int find_ipv4_start_node(MMDB_s *const mmdb) {
     }
 
     record_info_s record_info = record_info_for_database(mmdb);
+    if (record_info.right_record_offset == 0) {
+        return MMDB_UNKNOWN_DATABASE_FORMAT_ERROR;
+    }
 
     const uint8_t *search_tree = mmdb->file_content;
     uint32_t node_value = 0;