Re: [PATCH 3/7] ARM: implement ARCH_STACKWALK

[Kees Cook]

On Fri, Oct 22, 2021 at 05:09:36PM +0200, Peter Zijlstra wrote:
> From: Ard Biesheuvel <ardb@xxxxxxxxxx>
> 
> Implement the flavor of CONFIG_STACKTRACE that relies mostly on generic
> code, and only need a small arch_stack_walk() helper that performs the
> actual frame unwinding.
> 
> Note that this removes the SMP check that used to live in
> __save_stack_trace(), but this is no longer needed now that the generic
> version of save_stack_trace_tsk() takes care not to walk the call stack
> of tasks that are live on other CPUs.
> 
> Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook