linux-kernel - Re: [PATCH v6 0/6] KASan for arm

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Date:   Tue, 8 Oct 2019 00:10:08 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Michal Hocko <mhocko@...e.com>,
        Julien Thierry <julien.thierry@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Christoffer Dall <christoffer.dall@....com>,
        David Howells <dhowells@...hat.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        kvmarm@...ts.cs.columbia.edu, Jonathan Corbet <corbet@....net>,
        Abbott Liu <liuwenliang@...wei.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        drjones@...hat.com, Vladimir Murzin <vladimir.murzin@....com>,
        Kees Cook <keescook@...omium.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Andre Przywara <andre.przywara@....com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Jinbum Park <jinb.park7@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Nicolas Pitre <nico@...xnic.net>,
        Greg KH <gregkh@...uxfoundation.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rob Landley <rob@...dley.net>, philip@....systems,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Garnier <thgarnie@...gle.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH v6 0/6] KASan for arm

On Mon, Oct 7, 2019 at 11:35 PM Florian Fainelli <f.fainelli@...il.com> wrote:
>
> On 7/18/19 12:51 AM, Arnd Bergmann wrote:
> > On Thu, Jul 11, 2019 at 7:00 PM Florian Fainelli
> > <florian.fainelli@...adcom.com> wrote:
> >> On 7/2/19 2:06 PM, Linus Walleij wrote:
> >
> >>
> >> Great, thanks a lot for taking a look. FYI, I will be on holiday from
> >> July 19th till August 12th, if you think you have more feedback between
> >> now and then, I can try to pick it up and submit a v7 with that feedback
> >> addressed, or it will happen when I return, or you can pick it up if you
> >> refer, all options are possible!
> >>
> >> @Arnd, should we squash your patches in as well?
> >
> > Yes, please do. I don't remember if I sent you all of them already,
> > here is the list of patches that I have applied locally on top of your
> > series to get a clean randconfig build:
> >
> > 123c3262f872 KASAN: push back KASAN_STACK to clang-10
>
> This one seems to have received some feedback, not sure if it was
> addressed or not in a subsequent patch?

ebb6d35a74ce ("kasan: remove clang version check for KASAN_STACK")

got applied, it seems clang will remain broken with KASAN_STACK
for a while.

> > 053555034bdf kasan: disable CONFIG_KASAN_STACK with clang on arm32
>
> This one I did not take based on Linus' feedback that is breaks booting
> on his RealView board.

That likely means that there is still a bigger problem somewhere.

      Arnd