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Subject: Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by
 generic topdown mmap layout
To:     Catalin Marinas <catalin.marinas@arm.com>
Cc:     Albert Ou <aou@eecs.berkeley.edu>,
        Kees Cook <keescook@chromium.org>,
        James Hogan <jhogan@kernel.org>,
        Palmer Dabbelt <palmer@sifive.com>,
        Will Deacon <will.deacon@arm.com>,
        Russell King <linux@armlinux.org.uk>,
        Ralf Baechle <ralf@linux-mips.org>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Paul Burton <paul.burton@mips.com>,
        linux-riscv@lists.infradead.org,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        linux-fsdevel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-mips@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
        linux-arm-kernel@lists.infradead.org,
        Luis Chamberlain <mcgrof@kernel.org>
References: <20190526134746.9315-1-alex@ghiti.fr>
 <20190526134746.9315-6-alex@ghiti.fr>
 <20190603174001.GL63283@arrakis.emea.arm.com>
From:   Alex Ghiti <alex@ghiti.fr>
Message-ID: <e8dab94d-679e-8898-033e-3b5dbf0cc044@ghiti.fr>
Date:   Tue, 4 Jun 2019 02:20:38 -0400
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On 6/3/19 1:40 PM, Catalin Marinas wrote:
> On Sun, May 26, 2019 at 09:47:37AM -0400, Alexandre Ghiti wrote:
>> This commits selects ARCH_HAS_ELF_RANDOMIZE when an arch uses the generic
>> topdown mmap layout functions so that this security feature is on by
>> default.
>> Note that this commit also removes the possibility for arm64 to have elf
>> randomization and no MMU: without MMU, the security added by randomization
>> is worth nothing.
> Not planning on this anytime soon ;).


Great :) Thanks for your time,

Alex


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