diff options
Diffstat (limited to 'kernel/arch/x86/include/asm/stackprotector.h')
| -rw-r--r-- | kernel/arch/x86/include/asm/stackprotector.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/arch/x86/include/asm/stackprotector.h b/kernel/arch/x86/include/asm/stackprotector.h index 64fb5cbe5..02fa39652 100644 --- a/kernel/arch/x86/include/asm/stackprotector.h +++ b/kernel/arch/x86/include/asm/stackprotector.h @@ -39,7 +39,9 @@ #include <asm/processor.h> #include <asm/percpu.h> #include <asm/desc.h> + #include <linux/random.h> +#include <linux/sched.h> /* * 24 byte read-only segment initializer for stack canary. Linker @@ -72,13 +74,12 @@ static __always_inline void boot_init_stack_canary(void) * For preempt-rt we need to weaken the randomness a bit, as * we can't call into the random generator from atomic context * due to locking constraints. We just leave canary - * uninitialized and use the TSC based randomness on top of - * it. + * uninitialized and use the TSC based randomness on top of it. */ #ifndef CONFIG_PREEMPT_RT_FULL get_random_bytes(&canary, sizeof(canary)); #endif - tsc = __native_read_tsc(); + tsc = rdtsc(); canary += tsc + (tsc << 32UL); current->stack_canary = canary; |