Re: [PATCH v1 01/10] mm/kasan: implement kasan_poison_range

[Alexander Potapenko]

On Tue, Sep 16, 2025 at 11:01 AM Ethan Graham
<ethan.w.s.graham@xxxxxxxxx> wrote:
>
> From: Ethan Graham <ethangraham@xxxxxxxxxx>
>
> Introduce a new helper function, kasan_poison_range(), to encapsulate
> the logic for poisoning an arbitrary memory range of a given size, and
> expose it publically in <include/linux/kasan.h>.
>
> This is a preparatory change for the upcoming KFuzzTest patches, which
> requires the ability to poison the inter-region padding in its input
> buffers.
>
> No functional change to any other subsystem is intended by this commit.
>
> ---
> v3:
> - Enforce KASAN_GRANULE_SIZE alignment for the end of the range in
>   kasan_poison_range(), and return -EINVAL when this isn't respected.
> ---
>
> Signed-off-by: Ethan Graham <ethangraham@xxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>