gd_compat.c

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#ifdef HAVE_CONFIG_H
#include <config.h>
#else
#include <php_config.h>
#endif
 
#include "gd_compat.h"
#include "php.h"
 
int overflow2(int a, int b)
{
 
    if(a <= 0 || b <= 0) {
        php_error_docref(NULL, E_WARNING, "One parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n");
        return 1;
    }
    if(a > INT_MAX / b) {
        php_error_docref(NULL, E_WARNING, "Product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
        return 1;
    }
    return 0;
}