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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
Date: Wed, 12 Feb 2020 09:28:00 +0000
Message-ID: <20200212092800.GD488264@arrakis.emea.arm.com> (raw)
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>

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-10 19:30 [PATCH v3 0/7] binfmt_elf: Update READ_IMPLIES_EXEC logic for modern CPUs Kees Cook
2020-02-10 19:30 ` [PATCH v3 1/7] x86/elf: Add table to document READ_IMPLIES_EXEC Kees Cook
2020-02-10 19:30 ` [PATCH v3 2/7] x86/elf: Split READ_IMPLIES_EXEC from executable GNU_STACK Kees Cook
2020-02-10 19:30 ` [PATCH v3 3/7] x86/elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces Kees Cook
2020-02-10 19:30 ` [PATCH v3 4/7] arm32/64, elf: Add tables to document READ_IMPLIES_EXEC Kees Cook
2020-02-12  9:27   ` Catalin Marinas
2020-02-10 19:30 ` [PATCH v3 5/7] arm32/64, elf: Split READ_IMPLIES_EXEC from executable GNU_STACK Kees Cook
2020-02-12  9:27   ` Catalin Marinas
2020-02-10 19:30 ` [PATCH v3 6/7] arm64, elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces Kees Cook
2020-02-12  9:28   ` Catalin Marinas [this message]
2020-02-10 19:30 ` [PATCH v3 7/7] selftests/exec: Add READ_IMPLIES_EXEC tests Kees Cook
2020-02-11 18:11   ` shuah
2020-02-11 19:25     ` Kees Cook
2020-02-11 21:06       ` shuah
2020-02-11 23:54         ` Kees Cook
2020-02-12  0:02           ` shuah
2020-02-11 17:17 ` [PATCH v3 0/7] binfmt_elf: Update READ_IMPLIES_EXEC logic for modern CPUs Jason Gunthorpe

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