From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 5/5] arm64: add KASan support
Date: Tue, 25 Aug 2015 10:15:47 +0100 [thread overview]
Message-ID: <20150825091547.GA21300@arm.com> (raw)
In-Reply-To: <20150824174736.GD7557@n2100.arm.linux.org.uk>
On Mon, Aug 24, 2015 at 06:47:36PM +0100, Russell King - ARM Linux wrote:
> On Mon, Aug 24, 2015 at 05:15:22PM +0300, Andrey Ryabinin wrote:
> > Yes, ~130Mb (3G/1G split) should work. 512Mb shadow is optional.
> > The only advantage of 512Mb shadow is better handling of user memory
> > accesses bugs
> > (access to user memory without copy_from_user/copy_to_user/strlen_user etc API).
>
> No need for that to be handed by KASan. I have patches in linux-next,
> now acked by Will, which prevent the kernel accessing userspace with
> zero memory footprint. No need for remapping, we have a way to quickly
> turn off access to userspace mapped pages on non-LPAE 32-bit CPUs.
> (LPAE is not supported yet - Catalin will be working on that using the
> hooks I'm providing once he returns.)
Hey, I only acked the "Efficiency cleanups" series so far! The PAN emulation
is still on my list.
Will
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Catalin Marinas <Catalin.Marinas@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
David Keitel <dkeitel@codeaurora.org>,
Alexander Potapenko <glider@google.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH v2 5/5] arm64: add KASan support
Date: Tue, 25 Aug 2015 10:15:47 +0100 [thread overview]
Message-ID: <20150825091547.GA21300@arm.com> (raw)
In-Reply-To: <20150824174736.GD7557@n2100.arm.linux.org.uk>
On Mon, Aug 24, 2015 at 06:47:36PM +0100, Russell King - ARM Linux wrote:
> On Mon, Aug 24, 2015 at 05:15:22PM +0300, Andrey Ryabinin wrote:
> > Yes, ~130Mb (3G/1G split) should work. 512Mb shadow is optional.
> > The only advantage of 512Mb shadow is better handling of user memory
> > accesses bugs
> > (access to user memory without copy_from_user/copy_to_user/strlen_user etc API).
>
> No need for that to be handed by KASan. I have patches in linux-next,
> now acked by Will, which prevent the kernel accessing userspace with
> zero memory footprint. No need for remapping, we have a way to quickly
> turn off access to userspace mapped pages on non-LPAE 32-bit CPUs.
> (LPAE is not supported yet - Catalin will be working on that using the
> hooks I'm providing once he returns.)
Hey, I only acked the "Efficiency cleanups" series so far! The PAN emulation
is still on my list.
Will
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Catalin Marinas <Catalin.Marinas@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
David Keitel <dkeitel@codeaurora.org>,
Alexander Potapenko <glider@google.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH v2 5/5] arm64: add KASan support
Date: Tue, 25 Aug 2015 10:15:47 +0100 [thread overview]
Message-ID: <20150825091547.GA21300@arm.com> (raw)
In-Reply-To: <20150824174736.GD7557@n2100.arm.linux.org.uk>
On Mon, Aug 24, 2015 at 06:47:36PM +0100, Russell King - ARM Linux wrote:
> On Mon, Aug 24, 2015 at 05:15:22PM +0300, Andrey Ryabinin wrote:
> > Yes, ~130Mb (3G/1G split) should work. 512Mb shadow is optional.
> > The only advantage of 512Mb shadow is better handling of user memory
> > accesses bugs
> > (access to user memory without copy_from_user/copy_to_user/strlen_user etc API).
>
> No need for that to be handed by KASan. I have patches in linux-next,
> now acked by Will, which prevent the kernel accessing userspace with
> zero memory footprint. No need for remapping, we have a way to quickly
> turn off access to userspace mapped pages on non-LPAE 32-bit CPUs.
> (LPAE is not supported yet - Catalin will be working on that using the
> hooks I'm providing once he returns.)
Hey, I only acked the "Efficiency cleanups" series so far! The PAN emulation
is still on my list.
Will
next prev parent reply other threads:[~2015-08-25 9:15 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-15 13:58 [PATCH v2 0/5] KASan for arm64 Andrey Ryabinin
2015-05-15 13:58 ` Andrey Ryabinin
2015-05-15 13:58 ` Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 1/5] kasan, x86: move KASAN_SHADOW_OFFSET to the arch Kconfig Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-16 11:27 ` Paul Bolle
2015-05-16 11:27 ` Paul Bolle
2015-05-16 11:27 ` Paul Bolle
2015-05-18 7:43 ` Andrey Ryabinin
2015-05-18 7:43 ` Andrey Ryabinin
2015-05-18 7:43 ` Andrey Ryabinin
2015-05-18 8:34 ` Paul Bolle
2015-05-18 8:34 ` Paul Bolle
2015-05-18 8:34 ` Paul Bolle
2015-05-15 13:59 ` [PATCH v2 2/5] x86: kasan: fix types in kasan page tables declarations Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 3/5] x86: kasan: generalize populate_zero_shadow() code Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 4/5] kasan, x86: move populate_zero_shadow() out of arch directory Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 5/5] arm64: add KASan support Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-15 13:59 ` Andrey Ryabinin
2015-05-26 13:35 ` Linus Walleij
2015-05-26 13:35 ` Linus Walleij
2015-05-26 13:35 ` Linus Walleij
2015-05-26 14:12 ` Andrey Ryabinin
2015-05-26 14:12 ` Andrey Ryabinin
2015-05-26 14:12 ` Andrey Ryabinin
2015-05-26 14:22 ` Andrey Ryabinin
2015-05-26 14:22 ` Andrey Ryabinin
2015-05-26 14:22 ` Andrey Ryabinin
2015-05-26 20:28 ` Linus Walleij
2015-05-26 20:28 ` Linus Walleij
2015-05-26 20:28 ` Linus Walleij
2015-05-27 12:40 ` Linus Walleij
2015-05-27 12:40 ` Linus Walleij
2015-05-27 12:40 ` Linus Walleij
2015-06-11 13:39 ` Linus Walleij
2015-06-11 13:39 ` Linus Walleij
2015-06-11 13:39 ` Linus Walleij
2015-06-12 18:14 ` Andrey Ryabinin
2015-06-12 18:14 ` Andrey Ryabinin
2015-06-12 18:14 ` Andrey Ryabinin
2015-06-13 15:25 ` Linus Walleij
2015-06-13 15:25 ` Linus Walleij
2015-06-13 15:25 ` Linus Walleij
2015-06-17 21:32 ` Andrey Ryabinin
2015-06-17 21:32 ` Andrey Ryabinin
2015-06-17 21:32 ` Andrey Ryabinin
2015-07-21 10:36 ` Linus Walleij
2015-07-21 10:36 ` Linus Walleij
2015-07-21 10:36 ` Linus Walleij
2015-07-21 14:27 ` Andrey Ryabinin
2015-07-21 14:27 ` Andrey Ryabinin
2015-07-21 14:27 ` Andrey Ryabinin
2015-07-21 21:27 ` Linus Walleij
2015-07-21 21:27 ` Linus Walleij
2015-07-21 21:27 ` Linus Walleij
2015-07-22 17:54 ` Andrey Ryabinin
2015-07-22 17:54 ` Andrey Ryabinin
2015-07-22 17:54 ` Andrey Ryabinin
2015-08-19 12:14 ` Linus Walleij
2015-08-19 12:14 ` Linus Walleij
2015-08-19 12:14 ` Linus Walleij
2015-08-19 14:51 ` Andrey Ryabinin
2015-08-19 14:51 ` Andrey Ryabinin
2015-08-19 14:51 ` Andrey Ryabinin
2015-08-24 13:02 ` Linus Walleij
2015-08-24 13:02 ` Linus Walleij
2015-08-24 13:02 ` Linus Walleij
2015-08-24 13:15 ` Russell King - ARM Linux
2015-08-24 13:15 ` Russell King - ARM Linux
2015-08-24 13:15 ` Russell King - ARM Linux
2015-08-24 13:45 ` Linus Walleij
2015-08-24 13:45 ` Linus Walleij
2015-08-24 13:45 ` Linus Walleij
2015-08-24 14:15 ` Andrey Ryabinin
2015-08-24 14:15 ` Andrey Ryabinin
2015-08-24 14:15 ` Andrey Ryabinin
2015-08-24 15:44 ` Vladimir Murzin
2015-08-24 15:44 ` Vladimir Murzin
2015-08-24 15:44 ` Vladimir Murzin
2015-08-24 16:00 ` Andrey Ryabinin
2015-08-24 16:00 ` Andrey Ryabinin
2015-08-24 16:00 ` Andrey Ryabinin
2015-08-24 16:16 ` Vladimir Murzin
2015-08-24 16:16 ` Vladimir Murzin
2015-08-24 16:16 ` Vladimir Murzin
2015-08-24 16:18 ` Andrey Ryabinin
2015-08-24 16:18 ` Andrey Ryabinin
2015-08-24 16:18 ` Andrey Ryabinin
2015-08-24 17:47 ` Russell King - ARM Linux
2015-08-24 17:47 ` Russell King - ARM Linux
2015-08-24 17:47 ` Russell King - ARM Linux
2015-08-25 9:15 ` Will Deacon [this message]
2015-08-25 9:15 ` Will Deacon
2015-08-25 9:15 ` Will Deacon
2015-07-08 15:48 ` Catalin Marinas
2015-07-08 15:48 ` Catalin Marinas
2015-07-08 15:48 ` Catalin Marinas
2015-07-10 17:11 ` Andrey Ryabinin
2015-07-10 17:11 ` Andrey Ryabinin
2015-07-10 17:11 ` Andrey Ryabinin
2015-07-14 15:04 ` Catalin Marinas
2015-07-14 15:04 ` Catalin Marinas
2015-07-14 15:04 ` Catalin Marinas
2015-07-15 8:55 ` Andrey Ryabinin
2015-07-15 8:55 ` Andrey Ryabinin
2015-07-15 8:55 ` Andrey Ryabinin
2015-07-15 16:37 ` Catalin Marinas
2015-07-15 16:37 ` Catalin Marinas
2015-07-15 16:37 ` Catalin Marinas
2015-07-16 15:30 ` Andrey Ryabinin
2015-07-16 15:30 ` Andrey Ryabinin
2015-07-16 15:30 ` Andrey Ryabinin
2015-07-16 16:03 ` Catalin Marinas
2015-07-16 16:03 ` Catalin Marinas
2015-07-16 16:03 ` Catalin Marinas
2015-07-17 13:13 ` Andrey Ryabinin
2015-07-17 13:13 ` Andrey Ryabinin
2015-07-17 13:13 ` Andrey Ryabinin
2015-07-18 2:44 ` Patrick Daly
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=20150825091547.GA21300@arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.