x86: fix the stackprotector canary of the boot CPU

Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/process_64.c

@@ -16,6 +16,7 @@
 
 #include <stdarg.h>
 
+#include <linux/stackprotector.h>
 #include <linux/cpu.h>
 #include <linux/errno.h>
 #include <linux/sched.h>

include/linux/stackprotector.h

 #ifndef _LINUX_STACKPROTECTOR_H
 #define _LINUX_STACKPROTECTOR_H 1
 
+#include <linux/compiler.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
 #ifdef CONFIG_CC_STACKPROTECTOR
 # include <asm/stackprotector.h>
 #else

init/main.c

@@ -546,6 +546,12 @@ asmlinkage void __init start_kernel(void)
 	unwind_init();
 	lockdep_init();
 	debug_objects_early_init();
+
+	/*
+	 * Set up the the initial canary ASAP:
+	 */
+	boot_init_stack_canary();
+
 	cgroup_init_early();
 
 	local_irq_disable();