From: Andrey Konovalov <andreyknvl@google.com>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>, Theodore Ts'o <tytso@mit.edu>,
Jan Kara <jack@suse.com>, Christopher Li <sparse@chrisli.org>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Michal Marek <michal.lkml@markovi.net>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Yury Norov <ynorov@caviumnetworks.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Kristina Martsenko <kristina.martsenko@arm.com>,
Punit Agrawal <punit.agrawal@arm.com>,
Dave Martin <Dave.Martin@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry@arm.com>,
Michael Weiser <michael.weiser@gmx.de>,
Steve Capper <steve.capper@arm.com>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Sandipan Das <sandipan@linux.vnet.ibm.com>,
Paul Lawrence <paullawrence@google.com>,
David Woodhouse <dwmw@amazon.co.uk>,
Kees Cook <keescook@chromium.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
kasan-dev <kasan-dev@googlegroups.com>,
linux-doc@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-ext4@vger.kernel.org, linux-sparse@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Kostya Serebryany <kcc@google.com>,
Evgeniy Stepanov <eugenis@google.com>,
Lee Smith <Lee.Smith@arm.com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
Jacob Bramley <Jacob.Bramley@arm.com>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
Kees Cook <keescook@google.com>, Jann Horn <jannh@google.com>,
Mark Brand <markbrand@google.com>
Subject: Re: [RFC PATCH 06/14] khwasan: enable top byte ignore for the kernel
Date: Fri, 9 Mar 2018 19:42:19 +0100 [thread overview]
Message-ID: <CAAeHK+zyGQtNxap6N5s11MWrQS-Y_uA7TRQnh5oP=HWZjPytsw@mail.gmail.com> (raw)
In-Reply-To: <0377a2e1-ccc2-51bf-26b9-978eb685cdce@arm.com>
On Fri, Mar 9, 2018 at 7:32 PM, Marc Zyngier <marc.zyngier@arm.com> wrote:
> Well, that's not quite how it works. KVM is an integral part of the
> kernel, and I don't really want to have to deal with regression (not to
> mention that KVM is an essential tool in our testing infrastructure).
>
> You could try and exclude KVM from the instrumentation (which we already
> have for invasive things such as KASAN), but I'm afraid that having a
> debugging option that conflicts with another essential part of the
> kernel is not an option.
>
> I'm happy to help you with that though.
>
Hm, KHWASAN instruments the very same parts of the kernel that KASAN
does (it reuses the same flag). I've checked, I actually have
CONFIG_KVM enabled in my test build, however I haven't tried to test
KVM yet. I'm planning to perform extensive fuzzing of the kernel with
syzkaller, so if there's any crashes caused by KHWASAN in kvm code
I'll see them. However if some bugs don't manifest as crashes, that
would be a difficult thing to detect for me.
Thanks!
next prev parent reply other threads:[~2018-03-09 18:42 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 19:44 [RFC PATCH 00/14] khwasan: kernel hardware assisted address sanitizer Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 01/14] khwasan: change kasan hooks signatures Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 02/14] khwasan: move common kasan and khwasan code to common.c Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 03/14] khwasan: add CONFIG_KASAN_CLASSIC and CONFIG_KASAN_TAGS Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 04/14] khwasan: adjust shadow size for CONFIG_KASAN_TAGS Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 05/14] khwasan: initialize shadow to 0xff Andrey Konovalov
2018-03-02 21:55 ` Evgenii Stepanov
2018-03-02 19:44 ` [RFC PATCH 06/14] khwasan: enable top byte ignore for the kernel Andrey Konovalov
2018-03-05 14:29 ` Mark Rutland
2018-03-09 18:15 ` Andrey Konovalov
2018-03-05 14:36 ` Mark Rutland
2018-03-06 14:24 ` Marc Zyngier
2018-03-09 18:21 ` Andrey Konovalov
2018-03-09 18:32 ` Marc Zyngier
2018-03-09 18:42 ` Andrey Konovalov [this message]
2018-03-09 19:06 ` Marc Zyngier
2018-03-09 19:16 ` Mark Rutland
2018-03-09 19:14 ` Mark Rutland
2018-03-09 18:17 ` Andrey Konovalov
2018-03-09 18:59 ` Mark Rutland
2018-03-02 19:44 ` [RFC PATCH 07/14] khwasan: add tag related helper functions Andrey Konovalov
2018-03-05 14:32 ` Mark Rutland
2018-03-06 18:31 ` Andrey Konovalov
2018-03-07 18:16 ` Christopher Lameter
2018-03-08 9:09 ` Dmitry Vyukov
2018-03-08 11:20 ` Mark Rutland
2018-03-02 19:44 ` [RFC PATCH 08/14] khwasan: perform untagged pointers comparison in krealloc Andrey Konovalov
2018-03-05 14:39 ` Mark Rutland
2018-03-06 18:33 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 09/14] khwasan: add hooks implementation Andrey Konovalov
2018-03-05 14:44 ` Mark Rutland
2018-03-06 18:38 ` Andrey Konovalov
2018-03-08 11:25 ` Mark Rutland
2018-03-09 18:10 ` Andrey Konovalov
2018-03-13 15:05 ` Alexander Potapenko
2018-03-13 17:00 ` Andrey Konovalov
2018-03-15 16:52 ` Andrey Ryabinin
2018-03-16 18:09 ` Andrey Konovalov
2018-03-16 18:16 ` Evgenii Stepanov
2018-03-16 18:24 ` Andrey Konovalov
2018-03-16 18:45 ` Evgenii Stepanov
2018-03-16 19:06 ` Andrey Konovalov
2018-03-16 20:21 ` Evgenii Stepanov
2018-03-20 0:44 ` Anthony Yznaga
2018-03-20 13:43 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 10/14] khwasan: add bug reporting routines Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 11/14] khwasan: add brk handler for inline instrumentation Andrey Konovalov
2018-03-05 14:51 ` Mark Rutland
2018-03-23 15:59 ` Andrey Konovalov
2018-03-24 3:42 ` Ard Biesheuvel
2018-03-26 9:36 ` Mark Rutland
2018-03-27 13:03 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 12/14] khwasan, jbd2: add khwasan annotations Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 13/14] khwasan: update kasan documentation Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 14/14] khwasan: default the instrumentation mode to inline Andrey Konovalov
2018-03-05 14:54 ` Mark Rutland
2018-03-09 18:06 ` Andrey Konovalov
2018-03-09 19:18 ` Mark Rutland
2018-03-12 13:10 ` Andrey Konovalov
2018-03-13 14:44 ` Alexander Potapenko
2018-03-13 16:49 ` Andrey Konovalov
2018-03-04 9:16 ` [RFC PATCH 00/14] khwasan: kernel hardware assisted address sanitizer Geert Uytterhoeven
2018-03-04 11:44 ` Ingo Molnar
2018-03-04 15:49 ` Geert Uytterhoeven
2018-03-06 18:21 ` Andrey Konovalov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAAeHK+zyGQtNxap6N5s11MWrQS-Y_uA7TRQnh5oP=HWZjPytsw@mail.gmail.com' \
--to=andreyknvl@google.com \
--cc=Dave.Martin@arm.com \
--cc=Jacob.Bramley@arm.com \
--cc=Lee.Smith@arm.com \
--cc=Ramana.Radhakrishnan@arm.com \
--cc=Ruben.Ayrapetyan@arm.com \
--cc=akpm@linux-foundation.org \
--cc=ard.biesheuvel@linaro.org \
--cc=arnd@arndb.de \
--cc=aryabinin@virtuozzo.com \
--cc=catalin.marinas@arm.com \
--cc=cl@linux.com \
--cc=corbet@lwn.net \
--cc=dvyukov@google.com \
--cc=dwmw@amazon.co.uk \
--cc=eugenis@google.com \
--cc=geert@linux-m68k.org \
--cc=glider@google.com \
--cc=iamjoonsoo.kim@lge.com \
--cc=jack@suse.com \
--cc=james.morse@arm.com \
--cc=jannh@google.com \
--cc=jpoimboe@redhat.com \
--cc=julien.thierry@arm.com \
--cc=kasan-dev@googlegroups.com \
--cc=kcc@google.com \
--cc=keescook@chromium.org \
--cc=keescook@google.com \
--cc=kristina.martsenko@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-sparse@vger.kernel.org \
--cc=marc.zyngier@arm.com \
--cc=mark.rutland@arm.com \
--cc=markbrand@google.com \
--cc=michael.weiser@gmx.de \
--cc=michal.lkml@markovi.net \
--cc=mingo@kernel.org \
--cc=ndesaulniers@google.com \
--cc=paullawrence@google.com \
--cc=penberg@kernel.org \
--cc=punit.agrawal@arm.com \
--cc=rientjes@google.com \
--cc=sandipan@linux.vnet.ibm.com \
--cc=sparse@chrisli.org \
--cc=steve.capper@arm.com \
--cc=suzuki.poulose@arm.com \
--cc=tglx@linutronix.de \
--cc=tytso@mit.edu \
--cc=will.deacon@arm.com \
--cc=yamada.masahiro@socionext.com \
--cc=ynorov@caviumnetworks.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox