linux-kernel - Re: An actual suggestion (Re: [GIT PULL] Kernel lockdown for secure boot)

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Message-ID: <CACdnJusC7pvGhaRZBHAQqxc8MLHBeFUdZAddUO5DG2kFZMktMA@mail.gmail.com>
Date:   Thu, 05 Apr 2018 00:22:02 +0000
From:   Matthew Garrett <mjg59@...gle.com>
To:     jmorris@...ei.org
Cc:     David Howells <dhowells@...hat.com>, luto@...nel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Theodore Ts'o" <tytso@....edu>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        jforbes@...hat.com, linux-man@...r.kernel.org, jlee@...e.com,
        LSM List <linux-security-module@...r.kernel.org>,
        linux-api@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        linux-efi <linux-efi@...r.kernel.org>
Subject: Re: An actual suggestion (Re: [GIT PULL] Kernel lockdown for secure boot)

On Wed, Apr 4, 2018 at 4:25 PM James Morris <jmorris@...ei.org> wrote:
> It's surely reasonable to allow an already secure-booted system to be
> debugged without needing to be rebooted.

alt-sysrq-x from a physical console will do that.