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