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

From: Florian Fainelli <florian.fainelli@broadcom.com>
To: Linus Walleij <linus.walleij@linaro.org>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Arnd Bergmann <arnd@arndb.de>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	mhocko@suse.com, Catalin Marinas <catalin.marinas@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	David Howells <dhowells@redhat.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	kvmarm@lists.cs.columbia.edu, Jonathan Corbet <corbet@lwn.net>,
	liuwenliang@huawei.com,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Russell King <linux@armlinux.org.uk>,
	kasan-dev@googlegroups.com,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Kees Cook <keescook@chromium.org>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	philip@cog.systems, jinb.park7@gmail.com,
	Thomas Gleixner <tglx@linutronix.de>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Nicolas Pitre <nico@fluxnic.net>,
	Greg KH <gregkh@linuxfoundation.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	Rob Landley <rob@landley.net>,
	Philippe Ombredanne <pombredanne@nexb.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	thgarnie@google.com, kirill.shutemov@linux.intel.com
Subject: Re: [PATCH v6 0/6] KASan for arm
Date: Thu, 11 Jul 2019 10:00:18 -0700	[thread overview]
Message-ID: <0ba50ae2-be09-f633-ab1f-860e8b053882@broadcom.com> (raw)
In-Reply-To: <CACRpkdbqW2kJNdPi6JPupaHA_qRTWG-MsUxeCz0c38MRujOSSA@mail.gmail.com>

On 7/2/19 2:06 PM, Linus Walleij wrote:
> Hi Florian,
> 
> On Tue, Jun 18, 2019 at 12:11 AM Florian Fainelli <f.fainelli@gmail.com> wrote:
> 
>> Abbott submitted a v5 about a year ago here:
>>
>> and the series was not picked up since then, so I rebased it against
>> v5.2-rc4 and re-tested it on a Brahma-B53 (ARMv8 running AArch32 mode)
>> and Brahma-B15, both LPAE and test-kasan is consistent with the ARM64
>> counter part.
>>
>> We were in a fairly good shape last time with a few different people
>> having tested it, so I am hoping we can get that included for 5.4 if
>> everything goes well.
> 
> Thanks for picking this up. I was trying out KASan in the past,
> got sidetracked and honestly lost interest a bit because it was
> boring. But I do realize that it is really neat, so I will try to help
> out with some review and test on a bunch of hardware I have.
> 
> At one point I even had this running on the ARMv4 SA1100
> (no joke!) and if I recall correctly, I got stuck because of things
> that might very well have been related to using a very fragile
> Arm testchip that later broke down completely in the l2cache
> when we added the spectre/meltdown fixes.

A blast from the past!

> 
> I start reviewing and testing.

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?
-- 
Florian
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