stackprotector: add boot_init_stack_canary()
add the boot_init_stack_canary() and make the secondary idle threads
use it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index d4c7ac7..5107cb2 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -147,7 +147,6 @@
{
current_thread_info()->status |= TS_POLLING;
-#ifdef CONFIG_CC_STACKPROTECTOR
/*
* If we're the non-boot CPU, nothing set the PDA stack
* canary up for us - and if we are the boot CPU we have
@@ -156,9 +155,8 @@
* invalid canaries already on the stack wont ever
* trigger):
*/
- current->stack_canary = get_random_int();
- write_pda(stack_canary, current->stack_canary);
-#endif
+ boot_init_stack_canary();
+
/* endless idle loop with no priority at all */
while (1) {
tick_nohz_stop_sched_tick();
