Re: [kernel-hardening] [PATCH 2/2] arm: Kconfig: Add ARCH_HAS_FORTIFY_SOURCE

[Kees Cook]

On Wed, Feb 28, 2018 at 6:30 AM, Jinbum Park <jinb.park7@xxxxxxxxx> wrote:
> CONFIG_FORTIFY_SOURCE detects various overflows at compile-time.
> (6974f0c4555e ("include/linux/string.h:
> add the option of fortified string.h functions)
>
> ARCH_HAS_FORTIFY_SOURCE means that the architecture can be built and
> run with CONFIG_FORTIFY_SOURCE.
>
> Since ARM can be built and run with that flag like other architectures,
> select ARCH_HAS_FORTIFY_SOURCE as default.
>
> Signed-off-by: Jinbum Park <jinb.park7@xxxxxxxxx>

Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>

-Kees

> ---
>  arch/arm/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 7e3d535..3765336 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -7,6 +7,7 @@ config ARM
>         select ARCH_HAS_DEBUG_VIRTUAL if MMU
>         select ARCH_HAS_DEVMEM_IS_ALLOWED
>         select ARCH_HAS_ELF_RANDOMIZE
> +       select ARCH_HAS_FORTIFY_SOURCE
>         select ARCH_HAS_SET_MEMORY
>         select ARCH_HAS_PHYS_TO_DMA
>         select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
> --
> 1.9.1
>



-- 
Kees Cook
Pixel Security