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sys/OpenBSD/stack_protector.c.patch Libc-391.5.21 Libc-763.12
--- Libc/Libc-391.5.21/sys/OpenBSD/stack_protector.c.patch
+++ Libc/Libc-763.12/sys/OpenBSD/stack_protector.c.patch
@@ -1,15 +1,157 @@
---- stack_protector.c.orig	2006-10-05 00:09:07.000000000 -0700
-+++ stack_protector.c	2006-10-05 00:18:28.000000000 -0700
-@@ -34,10 +34,10 @@
- #include <syslog.h>
+--- stack_protector.c.orig	2010-10-07 09:55:01.000000000 -0700
++++ stack_protector.c	2010-10-07 09:55:30.000000000 -0700
+@@ -28,65 +28,112 @@
+  */
  
- long __guard[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+ #include <sys/param.h>
+-#include <sys/sysctl.h>
+ #include <signal.h>
+ #include <string.h>
+-#include <syslog.h>
++#include <stdlib.h>
++#include <asl.h>
+ #include <unistd.h>
++#include <sys/types.h>
++#include <fcntl.h>
++#include "CrashReporterClient.h"
++#include "libproc.h"
++#include "_simple.h"
++
++#define	GUARD_MAX 8
++long __stack_chk_guard[GUARD_MAX] = {0, 0, 0, 0, 0, 0, 0, 0};
++void __abort(void) __dead2;
++void __guard_setup(const char *apple[]) __attribute__ ((visibility ("hidden")));
++void __stack_chk_fail(void);
+ 
+-extern int __sysctl(int *, u_int, void *, size_t *, void *, size_t);
++static void
++__guard_from_kernel(const char *str)
++{
++	unsigned long long val;
++	char tmp[20], *p;
++	int idx = 0;
++
++	/* Skip over the 'stack_guard=' key to the list of values */
++	str = strchr(str, '=');
++	if (str == NULL)
++		return;
++	str++;
+ 
+-long __guard[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 -static void __guard_setup(void) __attribute__ ((constructor));
-+__private_extern__ void __guard_setup(void);
- void __stack_smash_handler(char func[], int damaged __attribute__((unused)));
+-void __stack_smash_handler(char func[], int damaged __attribute__((unused)));
++	while (str && idx < GUARD_MAX) {
++		/*
++		 * Pull the next numeric string out of the list and convert it to
++		 * a real number.
++		 */
++		strlcpy(tmp, str, 20);
++		p = strchr(tmp, ',');
++		if (p)
++			*p = '\0';
++		val = strtoull(tmp, NULL, 0);
++		__stack_chk_guard[idx] = (long)(val & ((unsigned long) -1));
++		idx++;
++		if ((str = strchr(str, ',')) != NULL)
++			str++;
++	}
++}
  
 -static void
-+__private_extern__ void
- __guard_setup(void)
+-__guard_setup(void)
++void
++__guard_setup(const char *apple[])
  {
-   int fd;
+-	int mib[2];
++	int fd;
+ 	size_t len;
++	const char **p;
+ 
+-	if (__guard[0] != 0)
++	if (__stack_chk_guard[0] != 0)
+ 		return;
+ 
+-	mib[0] = CTL_KERN;
+-	mib[1] = KERN_ARND;
++	for (p = apple; p && *p; p++) {
++		if (strstr(*p, "stack_guard") == *p) {
++			__guard_from_kernel(*p);
++			if (__stack_chk_guard[0] != 0)
++				return;
++		}
++	}
+ 
+-	len = sizeof(__guard);
+-	if (__sysctl(mib, 2, __guard, &len, NULL, 0) == -1 ||
+-	    len != sizeof(__guard)) {
+-		/* If sysctl was unsuccessful, use the "terminator canary". */
+-		((unsigned char *)__guard)[0] = 0;
+-		((unsigned char *)__guard)[1] = 0;
+-		((unsigned char *)__guard)[2] = '\n';
+-		((unsigned char *)__guard)[3] = 255;
++	fd = open ("/dev/urandom", 0);
++	if (fd != -1) {
++		len = read (fd, (char*)&__stack_chk_guard, sizeof(__stack_chk_guard));
++		close(fd);
++		if (len == sizeof(__stack_chk_guard) && 
++                    *__stack_chk_guard != 0)
++			return;
+ 	}
++
++	/* If If a random generator can't be used, the protector switches the guard
++           to the "terminator canary" */
++	((unsigned char *)__stack_chk_guard)[0] = 0;
++	((unsigned char *)__stack_chk_guard)[1] = 0;
++	((unsigned char *)__stack_chk_guard)[2] = '\n';
++	((unsigned char *)__stack_chk_guard)[3] = 255;
+ }
+ 
+-/*ARGSUSED*/
++#define STACKOVERFLOW	"] stack overflow"
++
+ void
+-__stack_smash_handler(char func[], int damaged)
++__stack_chk_fail()
+ {
+-	struct syslog_data sdata = SYSLOG_DATA_INIT;
+-	const char message[] = "stack overflow in function %s";
+-	struct sigaction sa;
+-	sigset_t mask;
+-
+-	/* Immediately block all signal handlers from running code */
+-	sigfillset(&mask);
+-	sigdelset(&mask, SIGABRT);
+-	sigprocmask(SIG_BLOCK, &mask, NULL);
+-
++	char n[16]; // bigger than will hold the digits in a pid_t
++	char *np;
++	int pid = getpid();
++	char message[sizeof(n) + sizeof(STACKOVERFLOW)] = "[";
++	char prog[2*MAXCOMLEN+1] = {0};
++
++	proc_name(pid, prog, 2*MAXCOMLEN);
++	prog[2*MAXCOMLEN] = 0;
++	np = n + sizeof(n);
++	*--np = 0;
++	while(pid > 0) {
++	    *--np = (pid % 10) + '0';
++	    pid /= 10;
++	}
++	strlcat(message, np, sizeof(message));
++	strlcat(message, STACKOVERFLOW, sizeof(message));
+ 	/* This may fail on a chroot jail... */
+-	syslog_r(LOG_CRIT, &sdata, message, func);
+-
+-	bzero(&sa, sizeof(struct sigaction));
+-	sigemptyset(&sa.sa_mask);
+-	sa.sa_flags = 0;
+-	sa.sa_handler = SIG_DFL;
+-	sigaction(SIGABRT, &sa, NULL);
+-
+-	kill(getpid(), SIGABRT);
++	_simple_asl_log_prog(ASL_LEVEL_CRIT, "user", message, prog);
+ 
+-	_exit(127);
++	CRSetCrashLogMessage(message);
++	__abort();
+ }