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-rw-r--r--net.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net.c b/net.c
index c1ff8e2..73ccb08 100644
--- a/net.c
+++ b/net.c
@@ -7,6 +7,7 @@
#include <string.h>
#include <assert.h>
#include <ctype.h>
+#include <limits.h>
#include <math.h>
#include "puzzles.h"
@@ -313,6 +314,8 @@ static const char *validate_params(const game_params *params, bool full)
return "Width and height must both be greater than zero";
if (params->width <= 1 && params->height <= 1)
return "At least one of width and height must be greater than one";
+ if (params->width > INT_MAX / params->height)
+ return "Width times height must not be unreasonably large";
if (params->barrier_probability < 0)
return "Barrier probability may not be negative";
if (params->barrier_probability > 1)