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

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Date:   Fri, 20 Mar 2020 10:26:40 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Marco Felsch <m.felsch@...gutronix.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>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        drjones@...hat.com, Vladimir Murzin <vladimir.murzin@....com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        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>,
        Sascha Hauer <kernel@...gutronix.de>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        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 Thu, Mar 5, 2020 at 10:44 AM Marco Felsch <m.felsch@...gutronix.de> wrote:
> On 20-03-05 09:43, Linus Walleij wrote:
> > Hi Florian,
> >
> > On Fri, Jan 17, 2020 at 8:55 PM Florian Fainelli <f.fainelli@...il.com> wrote:
> >
> > > Let me submit and rebase v7 get the auto builders some days to see if it
> > > exposes a new build issue and then we toss it to RMK's patch tracker and
> > > fix bugs from there?
> >
> > Sorry for hammering, can we get some initial patches going into
> > Russell's patch tracker here? I can sign them off and put them in
> > if you don't have time.
>
> I've tested the branch on several imx6 based boards with different
> toolchains. Some boards booting normal and some of them are lost in
> space... I didn't debugged it yet just wanted to inform you.

Hm. I will bring up the KASan stack on more boards.

If the system is anywhere close to being low on memory they
will naturally crash, this is an unavoidable side effect of KASan
or anything else that just chew of a big chunk of memory, that I ran into,
as I was booting from initramfs on very memory
constrained systems.

Yours,
Linus Walleij