linux-kernel - Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP

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]

Message-ID: <3e29151d-0afc-c874-3e5e-557403ad10d3@gmail.com>
Date:   Mon, 15 Jan 2018 17:56:18 +0100
From:   Gabriel C <nix.or.die@...il.com>
To:     Juergen Gross <jgross@...e.com>, Ingo Molnar <mingo@...nel.org>
Cc:     Borislav Petkov <bp@...en8.de>,
        Mike Galbraith <mgalbraith@...e.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP

On 15.01.2018 17:42, Juergen Gross wrote:
> On 15/01/18 17:29, Gabriel C wrote:
>> On 15.01.2018 16:40, Juergen Gross wrote:
>>> On 15/01/18 16:32, Ingo Molnar wrote:
>>>>
>>
>> Hi Juergen,
>>
>>>> * Juergen Gross <jgross@...e.com> wrote:
>>>>
>>>>> On 15/01/18 15:56, Borislav Petkov wrote:
>>>>>> On Mon, Jan 15, 2018 at 03:52:25PM +0100, Juergen Gross wrote:
>>>>>>> Ingo, with my finding that above boot failure is related to a bug in
>>>>>>> openSUSE's grub2 (I've verified it soesn't exist in upstream grub2),
>>>>>>
>>>>>> The box I'm seeing this on has SLES12-SP2 grub:
>>>>>>
>>>>>> Version        : 2.02~beta2-115.9.1
>>>>>>
>>>>>> Does it have the same bug?
>>>>>
>>>>> The patch introducing this problem is from 2012. So I guess: yes.
>>>>
>>>> I suspect this makes it a widespread, unintended ABI. Can we detect
>>>> and somehow avoid it?
>>>>
>>>> The boot protocol ABI sucks if it's fragile against such mistakes.
>>>
>>> Well, copying sizeof(setup_header) into grub2 and then coyping back just
>>> 1024 bytes is plain wrong. It is a miracle nothing broke up to now.
>>>
>>
>> I'm not on SUSE and hit that too on an H11DSi-NT.
>> See: https://marc.info/?l=linux-kernel&m=151579540320553&w=2
> 
> Where does your grub come from?

https://github.com/frugalware/frugalware-current/tree/master/source/base/grub2