[PATCH][IMPISH] UBUNTU: [Config] Enable CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT

[Krzysztof Kozlowski]

On 25/06/2021 10:42, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> Kernel stack offset randomization is a useful security feature
> that should be enabled. Benchmarking showed that the impact is
> within the noise of various microbenchmarks so I believe this
> has some added benefit with minimal performance impact. The
> security folk believe this is worth enabling, so lets switch
> it on.
> 
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>  debian.master/config/config.common.ubuntu | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu
> index ab828d5..0b46c98 100644
> --- a/debian.master/config/config.common.ubuntu
> +++ b/debian.master/config/config.common.ubuntu
> @@ -8415,7 +8415,7 @@ CONFIG_RAID6_PQ_BENCHMARK=y
>  CONFIG_RAID_ATTRS=m
>  # CONFIG_RANDOM32_SELFTEST is not set
>  CONFIG_RANDOMIZE_BASE=y
> -# CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT is not set
> +CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y
>  CONFIG_RANDOMIZE_MEMORY=y
>  CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING=0xa
>  CONFIG_RANDOMIZE_MODULE_REGION_FULL=y

My impish v5.11 does not have RANDOMIZE_KSTACK_OFFSET. Did you mean
unstable?


Best regards,
Krzysztof