blob: 77be64f4d18f437d33db3eee0b6e0fb3ee5e7451 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/libkern.h>
long __stack_chk_guard[8] = {};
void __stack_chk_fail(void);
void
__stack_chk_fail(void)
{
panic("stack overflow detected; backtrace may be corrupted");
}
static void
__stack_chk_init(void *dummy __unused)
{
size_t i;
long guard[nitems(__stack_chk_guard)];
arc4rand(guard, sizeof(guard), 0);
for (i = 0; i < nitems(guard); i++)
__stack_chk_guard[i] = guard[i];
}
SYSINIT(stack_chk, SI_SUB_RANDOM, SI_ORDER_ANY, __stack_chk_init, NULL);
|
