Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757185AbbEVWVf (ORCPT ); Fri, 22 May 2015 18:21:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52651 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1945968AbbEVWVe (ORCPT ); Fri, 22 May 2015 18:21:34 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <20150522141358.2581.qmail@ns.horizon.com> <24757.1432332934@warthog.procyon.org.uk> To: Andy Lutomirski Cc: dhowells@redhat.com, Linus Torvalds , George Spelvin , David Woodhouse , Linux Kernel Mailing List , LSM List , petkan@mip-labs.com, "Theodore Ts'o" , Mimi Zohar Subject: Re: Should we automatically generate a module signing key at all? MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <24863.1432333288.1@warthog.procyon.org.uk> Date: Fri, 22 May 2015 23:21:28 +0100 Message-ID: <24864.1432333288@warthog.procyon.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 574 Lines: 16 Andy Lutomirski wrote: > > Since it's discarded at the end of boot, it could be padded significantly. > > If you use the hash tree approach, the size of the thing in bzImage is > constant. Given that bzImage is usually compressed, a whole slew of contiguous zero padding is also constant in size. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/