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Date: Wed, 12 Feb 2020 09:28:00 +0000
From: Catalin Marinas <catalin.marinas@arm.com>
To: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>, Hector Marco-Gisbert <hecmargi@upv.es>,
	Will Deacon <will.deacon@arm.com>,
	Jason Gunthorpe <jgg@mellanox.com>, Jann Horn <jannh@google.com>,
	Russell King <linux@armlinux.org.uk>, x86@kernel.org,
	kernel-hardening@lists.openwall.com,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v3 6/7] arm64, elf: Disable automatic READ_IMPLIES_EXEC
 for 64-bit address spaces
Message-ID: <20200212092800.GD488264@arrakis.emea.arm.com>
References: <20200210193049.64362-1-keescook@chromium.org>
 <20200210193049.64362-7-keescook@chromium.org>
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In-Reply-To: <20200210193049.64362-7-keescook@chromium.org>

On Mon, Feb 10, 2020 at 11:30:48AM -0800, Kees Cook wrote:
> With arm64 64-bit environments, there should never be a need for automatic
> READ_IMPLIES_EXEC, as the architecture has always been execute-bit aware
> (as in, the default memory protection should be NX unless a region
> explicitly requests to be executable).
> 
> Suggested-by: Hector Marco-Gisbert <hecmargi@upv.es>
> Signed-off-by: Kees Cook <keescook@chromium.org>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>