usr
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src
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debug
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php-5.6.40
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ext
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gd
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libgd
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gd_security.c
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/* * 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 <stdio.h> #include <stdlib.h> #include <limits.h> #include "gd.h" int overflow2(int a, int b) { if(a <= 0 || b <= 0) { php_gd_error("gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n"); return 1; } if(a > INT_MAX / b) { php_gd_error("gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n"); return 1; } return 0; }
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