linux-kernel - Re: [tip:x86/asm] x86/asm/entry: Add user_mode_ignore

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Date:	Mon, 23 Mar 2015 12:38:45 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Brad Spengler <spender@...ecurity.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Lutomirski <luto@...nel.org>,
	Denys Vlasenko <dvlasenk@...hat.com>
Cc:	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/asm] x86/asm/entry: Add user_mode_ignore_vm86()

On Mon, Mar 23, 2015 at 5:26 AM, tip-bot for Andy Lutomirski
<tipbot@...or.com> wrote:
> Commit-ID:  a67e7277d01ccfd39b0db5a198c2643cc19dd79c
> Gitweb:     http://git.kernel.org/tip/a67e7277d01ccfd39b0db5a198c2643cc19dd79c
> Author:     Andy Lutomirski <luto@...nel.org>
> AuthorDate: Wed, 18 Mar 2015 18:33:29 -0700
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Mon, 23 Mar 2015 11:13:36 +0100
>
> x86/asm/entry: Add user_mode_ignore_vm86()
>
> user_mode() is dangerous and user_mode_vm() has a confusing name.
>
> Add user_mode_ignore_vm86() (equivalent to current user_mode()).
> We'll change the small number of legitimate users of user_mode()
> to user_mode_ignore_vm86().
>
> Inspired by grsec, although this works rather differently.

Ingo, does this mean that you changed your mind or do you still want a
patch to delete user_mode_ignore_vm86 and just use user_mode
everywhere instead?

--Andy
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