From: Will Deacon <will@kernel.org>
To: Boyan Karatotev <boyan.karatotev@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
vincenzo.frascino@arm.com, 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: Fri, 11 Sep 2020 19:15:59 +0100 [thread overview]
Message-ID: <20200911181558.GA21319@willie-the-truck> (raw)
In-Reply-To: <20200831110450.30188-1-boyan.karatotev@arm.com>
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.
Cheers,
Will
next prev parent reply other threads:[~2020-09-11 18:16 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 [this message]
2020-09-14 12:24 ` Vincenzo Frascino
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