Re: [RFC patch 13/41] mm/kasan: Remove the ULONG_MAX stack trace hackery

[Dmitry Vyukov]

On Wed, Apr 10, 2019 at 1:05 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
> No architecture terminates the stack trace with ULONG_MAX anymore. Remove
> the cruft.
>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
> Cc: Alexander Potapenko <glider@xxxxxxxxxx>
> Cc: kasan-dev@xxxxxxxxxxxxxxxx
> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
> ---
>  mm/kasan/common.c |    3 ---
>  1 file changed, 3 deletions(-)
>
> --- a/mm/kasan/common.c
> +++ b/mm/kasan/common.c
> @@ -74,9 +74,6 @@ static inline depot_stack_handle_t save_
>
>         save_stack_trace(&trace);
>         filter_irq_stacks(&trace);
> -       if (trace.nr_entries != 0 &&
> -           trace.entries[trace.nr_entries-1] == ULONG_MAX)
> -               trace.nr_entries--;
>
>         return depot_save_stack(&trace, flags);
>  }


Acked-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>