Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756221AbdDEXiV (ORCPT ); Wed, 5 Apr 2017 19:38:21 -0400 Received: from mail-oi0-f65.google.com ([209.85.218.65]:36473 "EHLO mail-oi0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752635AbdDEXiM (ORCPT ); Wed, 5 Apr 2017 19:38:12 -0400 MIME-Version: 1.0 In-Reply-To: <149142336965.5101.2946578135980499557.stgit@warthog.procyon.org.uk> References: <149142326734.5101.4596394505987813763.stgit@warthog.procyon.org.uk> <149142336965.5101.2946578135980499557.stgit@warthog.procyon.org.uk> From: "Rafael J. Wysocki" Date: Thu, 6 Apr 2017 01:38:10 +0200 X-Google-Sender-Auth: cmdnkWMioUuKX_NFhDmPycyg18A Message-ID: Subject: Re: [PATCH 11/24] uswsusp: Disable when the kernel is locked down To: David Howells Cc: Linux Kernel Mailing List , Matthew Garrett , linux-efi@vger.kernel.org, gnomes@lxorguk.ukuu.org.uk, Greg Kroah-Hartman , Linux PM , 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: 521 Lines: 15 On Wed, Apr 5, 2017 at 10:16 PM, David Howells wrote: > From: Matthew Garrett > > uswsusp allows a user process to dump and then restore kernel state, which > makes it possible to modify the running kernel. Disable this if the kernel > is locked down. > > Signed-off-by: Matthew Garrett > Signed-off-by: David Howells > cc: linux-pm@vger.kernel.org You probably want to disable hibernation altogether in this case. Thanks, Rafael