From: Vincenzo Frascino <vincenzo.frascino@arm.com>
To: Will Deacon <will@kernel.org>, Boyan Karatotev <boyan.karatotev@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
amit.kachhap@arm.com, boian4o1@gmail.com,
Shuah Khan <shuah@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH v2 0/4] kselftests/arm64: add PAuth tests
Date: Mon, 14 Sep 2020 13:24:05 +0100 [thread overview]
Message-ID: <626cb564-22e1-4f2d-47c7-f38439c5fb29@arm.com> (raw)
In-Reply-To: <20200911181558.GA21319@willie-the-truck>
Hi Will,
On 9/11/20 7:15 PM, Will Deacon wrote:
> On Mon, Aug 31, 2020 at 12:04:46PM +0100, Boyan Karatotev wrote:
>> Pointer Authentication (PAuth) is a security feature introduced in ARMv8.3.
>> It introduces instructions to sign addresses and later check for potential
>> corruption using a second modifier value and one of a set of keys. The
>> signature, in the form of the Pointer Authentication Code (PAC), is stored
>> in some of the top unused bits of the virtual address (e.g. [54: 49] if
>> TBID0 is enabled and TnSZ is set to use a 48 bit VA space). A set of
>> controls are present to enable/disable groups of instructions (which use
>> certain keys) for compatibility with libraries that do not utilize the
>> feature. PAuth is used to verify the integrity of return addresses on the
>> stack with less memory than the stack canary.
>
> Any chance of a v3 addressing the couple of small comments from Dave on
> the third patch, please? Then I can pick up the whole lot for 5.10.
>
Boyan is on it. Thank you.
> Cheers,
>
> Will
>
--
Regards,
Vincenzo
prev parent reply other threads:[~2020-09-14 17:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-31 11:04 [PATCH v2 0/4] kselftests/arm64: add PAuth tests Boyan Karatotev
2020-08-31 11:04 ` [PATCH v2 1/4] kselftests/arm64: add a basic Pointer Authentication test Boyan Karatotev
2020-09-16 12:11 ` Amit Kachhap
2020-09-17 13:38 ` Boyan Karatotev
2020-08-31 11:04 ` [PATCH v2 2/4] kselftests/arm64: add nop checks for PAuth tests Boyan Karatotev
2020-08-31 11:04 ` [PATCH v2 3/4] kselftests/arm64: add PAuth test for whether exec() changes keys Boyan Karatotev
2020-09-02 17:08 ` Dave Martin
2020-09-03 10:48 ` Boyan Karatotev
2020-09-07 10:35 ` Dave Martin
2020-08-31 11:04 ` [PATCH v2 4/4] kselftests/arm64: add PAuth tests for single threaded consistency and key uniqueness Boyan Karatotev
2020-08-31 21:04 ` [PATCH v2 0/4] kselftests/arm64: add PAuth tests Shuah Khan
2020-09-11 18:15 ` Will Deacon
2020-09-14 12:24 ` Vincenzo Frascino [this message]
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=626cb564-22e1-4f2d-47c7-f38439c5fb29@arm.com \
--to=vincenzo.frascino@arm.com \
--cc=amit.kachhap@arm.com \
--cc=boian4o1@gmail.com \
--cc=boyan.karatotev@arm.com \
--cc=catalin.marinas@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=shuah@kernel.org \
--cc=will@kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox