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Last-ditch grid-size limit for Fifteen

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At least prevent integer overflow when constructing the grid.
This commit is contained in:
Ben Harris
2023-01-10 23:37:21 +00:00
parent d422dd6009
commit 522588f699
1 changed files with 3 additions and 0 deletions
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3
fifteen.c
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@ -7,6 +7,7 @@
#include <string.h> #include <string.h>
#include <assert.h> #include <assert.h>
#include <ctype.h> #include <ctype.h>
#include <limits.h>
#include <math.h> #include <math.h>
#include "puzzles.h" #include "puzzles.h"
@ -138,6 +139,8 @@ static const char *validate_params(const game_params *params, bool full)
{ {
if (params->w < 2 || params->h < 2) if (params->w < 2 || params->h < 2)
return "Width and height must both be at least two"; 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; return NULL;
} }