Re: [PATCH v6 1/2] kasan: introduce ARCH_DEFER_KASAN and unify static key across modes

[Andrey Konovalov <andreyknvl@gmail.com>]

On Wed, Sep 3, 2025 at 3:00 PM Andrey Konovalov <andreyknvl@gmail.com> wrote:
>
> > +void __kasan_save_free_info(struct kmem_cache *cache, void *object);
> > +static inline void kasan_save_free_info(struct kmem_cache *cache, void *object)
> > +{
> > +       if (kasan_enabled())
> > +               __kasan_save_free_info(cache, object);
> > +}
>
> What I meant with these __wrappers was that we should add them for the
> KASAN hooks that are called from non-KASAN code (i.e. for the hooks
> defined in include/linux/kasan.h). And then move all the
> kasan_enabled() checks from mm/kasan/* to where the wrappers are
> defined in include/linux/kasan.h (see kasan_unpoison_range() as an
> example).
>
> kasan_save_free_info is a KASAN internal function that should need
> such a wrapper.

... should _not_ need ...

>
> For now, to make these patches simpler, you can keep kasan_enabled()
> checks in mm/kasan/*, where they are now. Later we can move them to
> include/linux/kasan.h with a separate patch.