From e2d390aae872cee4cb16d746af3b2eeb7713cbf5 Mon Sep 17 00:00:00 2001
From: Ben Harris <bjh21@bjh21.me.uk>
Date: Sun, 26 Feb 2023 14:51:09 +0000
Subject: [PATCH] Map: reduce maximum size

validate_desc relies on being able to calculate 2*wh in an int, so the
maximum grid size is at most INT_MAX/2.
---
 map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/map.c b/map.c
index 0478344..2d624b9 100644
--- a/map.c
+++ b/map.c
@@ -255,7 +255,7 @@ static const char *validate_params(const game_params *params, bool full)
 {
     if (params->w < 2 || params->h < 2)
 	return "Width and height must be at least two";
-    if (params->w > INT_MAX / params->h)
+    if (params->w > INT_MAX / 2 / params->h)
         return "Width times height must not be unreasonably large";
     if (params->n < 5)
 	return "Must have at least five regions";