YAML_DECLARE(int)
yaml_stack_extend(void **start, void **top, void **end)
{
- void *new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2);
+ void *new_start;
+
+ if ((char *)*end - (char *)*start >= INT_MAX / 2)
+ return 0;
+
+ new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2);
if (!new_start) return 0;