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Message-ID: <CAGXu5jKQjtwZ-JFPBQ8epjuXYbQ4d4s404-=hJm_y=CpsHQFAA@mail.gmail.com>
Date: Fri, 10 Feb 2017 10:41:58 -0800
From: Kees Cook <keescook@...omium.org>
To: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
Mark Rutland <mark.rutland@....com>, Will Deacon <will.deacon@....com>,
Catalin Marinas <catalin.marinas@....com>, Laura Abbott <labbott@...oraproject.org>,
James Morse <james.morse@....com>, kvmarm@...ts.cs.columbia.edu,
Marc Zyngier <marc.zyngier@....com>, Christoffer Dall <christoffer.dall@...aro.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, andre.przywara@....com
Subject: Re: [PATCH 3/4] arm64: mmu: map .text as read-only from the outset
On Fri, Feb 10, 2017 at 9:16 AM, Ard Biesheuvel
<ard.biesheuvel@...aro.org> wrote:
> Now that alternatives patching code no longer relies on the primary
> mapping of .text being writable, we can remove the code that removes
> the writable permissions post-init time, and map it read-only from
> the outset.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Awesome!
Reviewed-by: Kees Cook <keescook@...omium.org>
-Kees
--
Kees Cook
Pixel Security
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