From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E43BC4CECD for ; Tue, 17 Sep 2019 17:24:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6008420640 for ; Tue, 17 Sep 2019 17:24:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=codon.org.uk header.i=@codon.org.uk header.b="GXmeeArS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731046AbfIQRYA (ORCPT ); Tue, 17 Sep 2019 13:24:00 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:55383 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726548AbfIQRYA (ORCPT ); Tue, 17 Sep 2019 13:24:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codon.org.uk; s=63138784; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=p/Q+CvkxpgWzkqU37khmk1tk72V2Nto6pk9CsPwb4UY=; b=GXmeeArS+BiPbi2Txo5Xa9Y+e 4DvOdWGNN40zMpf4xxy8Lbbnc7pe34/tkUKFiXgiwa4CHa3UW6oc7xrYHflVTBTg6AavgztyQXzkV EkanaHSCckybc/eFh/YUuIEqj64lg7KNzAYDVoGBUNvhRJrfwU+EpZYM6D9x3QpCklvX4=; Received: from mjg59 by cavan.codon.org.uk with local (Exim 4.89) (envelope-from ) id 1iAHCW-0002XQ-8p; Tue, 17 Sep 2019 18:23:40 +0100 Date: Tue, 17 Sep 2019 18:23:40 +0100 From: Matthew Garrett To: Willy Tarreau Cc: Linus Torvalds , Martin Steigerwald , "Ahmed S. Darwish" , "Theodore Y. Ts'o" , Vito Caputo , Lennart Poettering , Andreas Dilger , Jan Kara , Ray Strode , William Jon McCann , "Alexander E. Patrakov" , zhangjs , linux-ext4@vger.kernel.org, lkml Subject: Re: Linux 5.3-rc8 Message-ID: <20190917172340.e5u7lz74rnnrlpoc@srcf.ucam.org> References: <20190917052438.GA26923@1wt.eu> <2508489.jOnZlRuxVn@merkaba> <20190917163456.alzodstm3hd4yrni@srcf.ucam.org> <20190917171641.GC27999@1wt.eu> <20190917172002.vrkudj2ejtrtl7rh@srcf.ucam.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190917172002.vrkudj2ejtrtl7rh@srcf.ucam.org> User-Agent: NeoMutt/20170113 (1.7.2) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 17, 2019 at 06:20:02PM +0100, Matthew Garrett wrote: > AES keys are used for a variety of long-lived purposes (eg, disk > encryption). And as an example of when we'd want to do that during early boot - swap is frequently encrypted with a random key generated on each boot, but it's still important for that key to be strong in order to avoid someone being able to recover the contents of swap. -- Matthew Garrett | mjg59@srcf.ucam.org