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

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Date:   Tue, 8 Oct 2019 10:47:05 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        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>,
        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 Tue, Oct 8, 2019 at 12:10 AM Arnd Bergmann <arnd@...db.de> wrote:
> On Mon, Oct 7, 2019 at 11:35 PM Florian Fainelli <f.fainelli@...il.com> wrote:

> > > 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.

I will try to look into it. I got pretty puzzled by this, it makes no sense.

One possible problem is that some of the test chips on the RealViews
are not that stable, especially with caches. The plan is to test in QEMU
and hardware in parallel.

Yours,
Linus Walleij