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Limit size of puzzle in Tents to avoid integer overflow

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Ben Harris
2023-01-12 14:34:14 +00:00
parent 91d96fa0bc
commit 07999443c2
1 changed files with 3 additions and 0 deletions
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3
tents.c
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@ -32,6 +32,7 @@
#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"
@ -408,6 +409,8 @@ static const char *validate_params(const game_params *params, bool full)
*/ */
if (params->w < 4 || params->h < 4) if (params->w < 4 || params->h < 4)
return "Width and height must both be at least four"; return "Width and height must both be at least four";
if (params->w > (INT_MAX - 1) / params->h)
return "Width times height must not be unreasonably large";
return NULL; return NULL;
} }