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Wed, 4 Apr 2018 20:22:15 -0400 Received: from mail-it0-f65.google.com ([209.85.214.65]:33443 "EHLO mail-it0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752548AbeDEAWO (ORCPT ); Wed, 4 Apr 2018 20:22:14 -0400 X-Google-Smtp-Source: AIpwx49JKzuNdAQLkq40+HuHH0+0BGWUy4C4uNlmbnfPSqjzbiFoFFRrhWC2dufckr8JSFiH9oAgypQVOpEVGFqSxkw= MIME-Version: 1.0 References: <1119.1522858644@warthog.procyon.org.uk> In-Reply-To: From: Matthew Garrett Date: Thu, 05 Apr 2018 00:22:02 +0000 Message-ID: Subject: Re: An actual suggestion (Re: [GIT PULL] Kernel lockdown for secure boot) To: jmorris@namei.org Cc: David Howells , luto@kernel.org, Greg Kroah-Hartman , "Theodore Ts'o" , Linus Torvalds , Ard Biesheuvel , Alan Cox , Linux Kernel Mailing List , jforbes@redhat.com, linux-man@vger.kernel.org, jlee@suse.com, LSM List , linux-api@vger.kernel.org, Kees Cook , linux-efi Content-Type: text/plain; charset="UTF-8" Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, Apr 4, 2018 at 4:25 PM James Morris 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.