linux-kernel - Re: [PATCH v11 00/24] kasan: add software tag-based mode for arm64

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Date:   Mon, 19 Nov 2018 17:32:02 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Kostya Serebryany <kcc@...gle.com>,
        Evgeniy Stepanov <eugenis@...gle.com>,
        Lee Smith <Lee.Smith@....com>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
        Jacob Bramley <Jacob.Bramley@....com>,
        Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
        Jann Horn <jannh@...gle.com>,
        Mark Brand <markbrand@...gle.com>,
        Chintan Pandya <cpandya@...eaurora.org>,
        Vishwath Mohan <vishwath@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Will Deacon <will.deacon@....com>,
        Christoph Lameter <cl@...ux.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Dave Martin <dave.martin@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Ingo Molnar <mingo@...nel.org>,
        Paul Lawrence <paullawrence@...gle.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        kasan-dev@...glegroups.com,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-sparse@...r.kernel.org,
        Linux Memory Management List <linux-mm@...ck.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH v11 00/24] kasan: add software tag-based mode for arm64

On Mon, Nov 19, 2018 at 06:28:57PM +0100, Andrey Konovalov wrote:
> On Mon, Nov 19, 2018 at 6:26 PM, Andrey Konovalov <andreyknvl@...gle.com> wrote:
> > Changes in v11:
> > - Rebased onto 9ff01193 (4.20-rc3).
> > - Moved KASAN_SHADOW_SCALE_SHIFT definition to arch/arm64/Makefile.
> > - Added and used CC_HAS_KASAN_GENERIC and CC_HAS_KASAN_SW_TAGS configs to
> >   detect compiler support.
> > - New patch: "kasan: rename kasan_zero_page to kasan_early_shadow_page".
> > - New patch: "arm64: move untagged_addr macro from uaccess.h to memory.h".
> > - Renamed KASAN_SET_TAG/... macros in arch/arm64/include/asm/memory.h to
> >   __tag_set/... and reused them later in KASAN core code instead of
> >   redefining.
> > - Removed tag reset from the __kimg_to_phys() macro.
> > - Fixed tagged pointer handling in arm64 fault handling logic.
> 
> Hi Mark and Catalin,

Hi Andrey,

> I've addressed your comments, please take a look.

Catalin and I have just returned from Linux Plumbers and are ctaching up
with things. I do intend to look at this, but it may take me a short
while before I can.

Thanks,
Mark.