linux-ext4 - Re: Linux 5.3-rc8

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Message-ID: <20190917172340.e5u7lz74rnnrlpoc@srcf.ucam.org>
Date:   Tue, 17 Sep 2019 18:23:40 +0100
From:   Matthew Garrett <mjg59@...f.ucam.org>
To:     Willy Tarreau <w@....eu>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Martin Steigerwald <martin@...htvoll.de>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        Vito Caputo <vcaputo@...garu.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jan Kara <jack@...e.cz>, Ray Strode <rstrode@...hat.com>,
        William Jon McCann <mccann@....edu>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        zhangjs <zachary@...shancloud.com>, linux-ext4@...r.kernel.org,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: Linux 5.3-rc8

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@...f.ucam.org