linux-kernel - Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout

Open Source and information security mailing list archives

Message-ID: <e8dab94d-679e-8898-033e-3b5dbf0cc044@ghiti.fr>
Date:   Tue, 4 Jun 2019 02:20:38 -0400
From:   Alex Ghiti <alex@...ti.fr>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Albert Ou <aou@...s.berkeley.edu>,
        Kees Cook <keescook@...omium.org>,
        James Hogan <jhogan@...nel.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Will Deacon <will.deacon@....com>,
        Russell King <linux@...linux.org.uk>,
        Ralf Baechle <ralf@...ux-mips.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Paul Burton <paul.burton@...s.com>,
        linux-riscv@...ts.infradead.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mips@...r.kernel.org, Christoph Hellwig <hch@....de>,
        linux-arm-kernel@...ts.infradead.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by
 generic topdown mmap layout

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@....com>
>
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> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
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