shithub: puzzles

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ref: 522588f699b3c910c5a47f8b8185e69250665313
parent: d422dd6009f3e48e13d5f7f162813537902e125c
author: Ben Harris <[email protected]>
date: Tue Jan 10 18:37:21 EST 2023

Last-ditch grid-size limit for Fifteen

At least prevent integer overflow when constructing the grid.

--- a/fifteen.c
+++ b/fifteen.c
@@ -7,6 +7,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
+#include <limits.h>
 #include <math.h>
 
 #include "puzzles.h"
@@ -138,6 +139,8 @@
 {
     if (params->w < 2 || params->h < 2)
 	return "Width and height must both be at least two";
+    if (params->w > INT_MAX / params->h)
+        return "Width times height must not be unreasonably large";
 
     return NULL;
 }