linux-kernel - Re: [PATCH v2 05/37] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE

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Date:   Fri, 18 Sep 2020 12:42:54 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Alexander Potapenko <glider@...gle.com>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Marco Elver <elver@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Elena Petrova <lenaptr@...gle.com>,
        Branislav Rankov <Branislav.Rankov@....com>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 05/37] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_*

On Fri, Sep 18, 2020 at 10:04 AM 'Alexander Potapenko' via kasan-dev
<kasan-dev@...glegroups.com> wrote:
>
> On Tue, Sep 15, 2020 at 11:16 PM Andrey Konovalov <andreyknvl@...gle.com> wrote:
> >
> > This is a preparatory commit for the upcoming addition of a new hardware
> > tag-based (MTE-based) KASAN mode.
> >
> > The new mode won't be using shadow memory, but will still use the concept
> > of memory granules.
>
> KASAN documentation doesn't seem to explain this concept anywhere (I
> also checked the "kasan: add documentation for hardware tag-based
> mode" patch), looks like it's only mentioned in MTE documentation.
> Could you please elaborate on what we consider a granule in each of KASAN modes?

Sure, will do in v3, thanks!