linux-kernel - Re: [PATCH 2/4] x86: ia32entry.S: fix wrong symbolic constant usage: R11->ARGOFFSET

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Message-ID: <20150110224556.GK12218@pd.tnic>
Date:	Sat, 10 Jan 2015 23:45:56 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	X86 ML <x86@...nel.org>, Alexei Starovoitov <ast@...mgrid.com>,
	Will Drewry <wad@...omium.org>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 2/4] x86: ia32entry.S: fix wrong symbolic constant usage:
 R11->ARGOFFSET

On Sat, Jan 10, 2015 at 02:41:07PM -0800, Linus Torvalds wrote:
> On Sat, Jan 10, 2015 at 2:35 PM, Borislav Petkov <bp@...en8.de> wrote:
> >
> > Haha, Linus just made you maintainer of entry_64.S :-)
> 
> Just going by
> 
>     git shortlog --no-merges --since=6.months arch/x86/kernel/entry_64.S
> 
> and looking at the kind of changes are going on, I really think a
> "tag, you're it" to Andy is a reasonable thing to do.
> 
> I just hope he's stupid^Wambitious enough to fall for it.

I'm sure he will, he's doing nuts stuff anyway to that file but it seems
to work so far :-)

You should take a look at this other thing too, using SYSRET to return
from exceptions:

https://lkml.kernel.org/r/49394403b8b12486a6b9c9c70b72bd9f5dce7364.1415403984.git.luto@amacapital.net

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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