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Message-ID: <55B328E0.8050701@amacapital.net>
Date: Fri, 24 Jul 2015 23:12:48 -0700
From: Andy Lutomirski <luto@...capital.net>
To: Josh Boyer <jwboyer@...oraproject.org>
Cc: oss security list <oss-security@...ts.openwall.com>
Subject: Re: Linux x86_64 NMI security issues
On 07/24/2015 07:16 AM, Josh Boyer wrote:
> On Wed, Jul 22, 2015 at 2:12 PM, Andy Lutomirski <luto@...capital.net> wrote:
>> Note: Several of these fixes each depend on a few patches immediately
>> before them. The NMI stack switching fix also depends on changes made
>> in 4.2 and will appear to apply but crash on older kernels. I have a
>> different variant that's more portable.
>
> Given that none of these are going to apply cleanly on older kernels,
> do you have backports available for 4.1.y and the longterm stable
> kernels?
>
There's this:
https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/nmi-backport
which is a combined effort of me and Ben Hutchings. It's not synced up
to the fixes in Linus' tree.
Note that even Linus' tree doesn't have the synchronous modify_ldt fix
yet. I sent a hopefully final version of that out a few minutes ago.
--Andy
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