diff options
Diffstat (limited to 'arch/x86/include/asm/stackprotector.h')
| -rw-r--r-- | arch/x86/include/asm/stackprotector.h | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h index 24a8d6c4fb18..00473a650f51 100644 --- a/arch/x86/include/asm/stackprotector.h +++ b/arch/x86/include/asm/stackprotector.h @@ -34,7 +34,6 @@ #include <asm/percpu.h> #include <asm/desc.h> -#include <linux/random.h> #include <linux/sched.h> /* @@ -50,22 +49,11 @@ */ static __always_inline void boot_init_stack_canary(void) { - u64 canary; - u64 tsc; + unsigned long canary = get_random_canary(); #ifdef CONFIG_X86_64 BUILD_BUG_ON(offsetof(struct fixed_percpu_data, stack_canary) != 40); #endif - /* - * We both use the random pool and the current TSC as a source - * of randomness. The TSC only matters for very early init, - * there it already has some randomness on most systems. Later - * on during the bootup the random pool has true entropy too. - */ - get_random_bytes(&canary, sizeof(canary)); - tsc = rdtsc(); - canary += tsc + (tsc << 32UL); - canary &= CANARY_MASK; current->stack_canary = canary; #ifdef CONFIG_X86_64 |