Annotation of embedaddon/php/ext/gd/libgd/gd_security.c, revision 1.1.1.1
1.1 misho 1: /*
2: * gd_security.c
3: *
4: * Implements buffer overflow check routines.
5: *
6: * Written 2004, Phil Knirsch.
7: * Based on netpbm fixes by Alan Cox.
8: *
9: */
10:
11: #ifdef HAVE_CONFIG_H
12: #include "config.h"
13: #endif
14:
15: #include <stdio.h>
16: #include <stdlib.h>
17: #include <limits.h>
18: #include "gd.h"
19:
20: int overflow2(int a, int b)
21: {
22: if(a <= 0 || b <= 0) {
23: php_gd_error("gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n");
24: return 1;
25: }
26: if(a > INT_MAX / b) {
27: php_gd_error("gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
28: return 1;
29: }
30: return 0;
31: }
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