Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755696AbdDFToE (ORCPT ); Thu, 6 Apr 2017 15:44:04 -0400 Received: from mail-oi0-f65.google.com ([209.85.218.65]:36348 "EHLO mail-oi0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751251AbdDFTnz (ORCPT ); Thu, 6 Apr 2017 15:43:55 -0400 MIME-Version: 1.0 In-Reply-To: <149142341772.5101.12366553346604485034.stgit@warthog.procyon.org.uk> References: <149142326734.5101.4596394505987813763.stgit@warthog.procyon.org.uk> <149142341772.5101.12366553346604485034.stgit@warthog.procyon.org.uk> From: "Rafael J. Wysocki" Date: Thu, 6 Apr 2017 21:43:54 +0200 X-Google-Sender-Auth: -zsWj0NFg2jUL2wC3-_r3v-LcV8 Message-ID: Subject: Re: [PATCH 17/24] acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down To: David Howells Cc: Linux Kernel Mailing List , gnomes@lxorguk.ukuu.org.uk, linux-efi@vger.kernel.org, Josh Boyer , Greg Kroah-Hartman , ACPI Devel Maling List , linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, matthew.garrett@nebula.com Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 413 Lines: 13 On Wed, Apr 5, 2017 at 10:16 PM, David Howells wrote: > From: Josh Boyer > > This option allows userspace to pass the RSDP address to the kernel, which > makes it possible for a user to circumvent any restrictions imposed on > loading modules. Ignore the option when the kernel is locked down. I'm not really sure here. What exactly is the mechanism? Thanks, Rafael