linux-kernel - Re: [PATCH] arm64: fix warning about swapper_pg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 14 Feb 2017 23:06:31 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Laura Abbott <labbott@...hat.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: fix warning about swapper_pg_dir overflow

On Tue, Feb 14, 2017 at 10:33 PM, Ard Biesheuvel
<ard.biesheuvel@...aro.org> wrote:
> On 14 February 2017 at 21:27, Arnd Bergmann <arnd@...db.de> wrote:

> We should see the same issue with 64k/3 levels, since its PGD_SIZE is
> also much smaller than its PAGE_SIZE. This is a much more common
> configuration, so I am surprised you found it on 16k/4 levels first.

I hadn't been doing regular build tests on arm64 and just started up some
randconfig builds, this was the first bug I ran into ;-)

> Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>

Thanks,

   Arnd