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34 lines
685 B
C
34 lines
685 B
C
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/*
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* gd_security.c
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*
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* Implements buffer overflow check routines.
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*
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* Written 2004, Phil Knirsch.
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* Based on netpbm fixes by Alan Cox.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "gd.h"
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int overflow2(int a, int b)
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{
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if(a < 0 || b < 0) {
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php_gd_error("gd warning: one parameter to a memory allocation multiplication is negative, failing operation gracefully\n");
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return 1;
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}
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if(b == 0)
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return 0;
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if(a > INT_MAX / b) {
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php_gd_error("gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
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return 1;
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}
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return 0;
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}
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