Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp5700681ybe; Tue, 17 Sep 2019 12:04:21 -0700 (PDT) X-Google-Smtp-Source: APXvYqyIEa7qxAyGvY3jHKqXFaM58WCZseiL1ay5bD70C9An7GNhS2CL+KAorTCTWXhnRUUfzqDy X-Received: by 2002:a17:906:7e44:: with SMTP id z4mr6155644ejr.290.1568747061619; Tue, 17 Sep 2019 12:04:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1568747061; cv=none; d=google.com; s=arc-20160816; b=NgK6IzAur5jP89uZleuQoRpoYqPR8QJMyJpquKaBznyh62oLHb2OHshwPnnX/nyFeT 5CJpwpbwS4ABEh3mg08wpGVoycqFT9LmXyN63hyS/+EJU9fsuWv8SuAzmsXrc0vD8QmB ldDHV2RFFhKMNVWdRlH/3iF2aVvsEnWRDbXdp4M89mQXjxsekbI9+KBh2bHehAhbJcTX 66V0Rrt+bfZwdXyEO7S3sNnBDgARO2nv+anzLDALWP30VSLnHKVHL3OC9rZvJ8nCL8Dw LjZqKl06nzB88orZHnsCI+wvJS1D8ZEdzvuF0rAIEmRKeHQiO6pYcS6u1WNceYS8qfV4 cZNA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=p/Q+CvkxpgWzkqU37khmk1tk72V2Nto6pk9CsPwb4UY=; b=pFYgf5acSnfzBqWvUt51gYWbV8wvvaUYPRYYr4clrfbKqWf2QGC1cMWohsIrVFTFEl PaUfkZI/ZtVFo6LsONsXdQJ/3LCkpLpcTf+ofZydgl4aBAuMyjP+c+SLL1GPf5Ua9MFO v6UFweuk4Qw1IVf86VPSf4i0lyw5VbofSg1f0cNV6n5jkM7pVFyUuSdnQFSvINdFj1G3 vECR9Pe3p9kwHDMea7YcUmk2EwaopuQBwul0v19qZhm+TFuJJKT3TB3saXnPF+tQpzv2 mZQekEXxxfXwKCSpZPjgUEvelmtO7awq4ydBeEvcWi3AvPqOb91om6+WU4Innz2rDgGp ahwg== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@codon.org.uk header.s=63138784 header.b=GXmeeArS; spf=pass (google.com: best guess record for domain of linux-ext4-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id n4si1968732edy.227.2019.09.17.12.03.55; Tue, 17 Sep 2019 12:04:21 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-ext4-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@codon.org.uk header.s=63138784 header.b=GXmeeArS; spf=pass (google.com: best guess record for domain of linux-ext4-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726786AbfIQRYA (ORCPT + 99 others); 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-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@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