linux-kernel - Re: [PATCH 01/24] Add the ability to lock down access to the running kernel image

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Message-ID: <CALCETrUaSeTwwiTs7LwNTcScUcVok1_j-OBnEQqGXmst5T++Sg@mail.gmail.com>
Date:   Wed, 11 Apr 2018 19:57:12 -0700
From:   Andy Lutomirski <luto@...capital.net>
To:     David Howells <dhowells@...hat.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-man <linux-man@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        James Morris <jmorris@...ei.org>,
        LKML <linux-kernel@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH 01/24] Add the ability to lock down access to the running
 kernel image

On Wed, Apr 11, 2018 at 9:24 AM, David Howells <dhowells@...hat.com> wrote:
>
>  (*) CONFIG_LOCK_DOWN_KERNEL
>
>      This makes lockdown available and applies it to all the points that
>      need to be locked down if the mode is set.  Lockdown mode can be
>      enabled by providing:
>
>         lockdown=1

By doing this, you are basically committing to making the
protect-kernel-integrity vs protect-kernel-secrecy split be a
second-class citizen if it gets added.

How about lockdown=integrity_and_secrecy or lockdown=2 if you feel
like using numbers?