linux-kernel - Re: [PATCH v43 01/15] Linux Random Number Generator

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Date:   Tue, 11 Jan 2022 15:01:42 +0500
From:   "Alexander E. Patrakov" <patrakov@...il.com>
To:     Matthew Garrett <mjg59@...f.ucam.org>
Cc:     "Theodore Ts'o" <tytso@....edu>, Andy Lutomirski <luto@...nel.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Marcelo Henrique Cerri <marcelo.cerri@...onical.com>,
        Simo Sorce <simo@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jeffrey Walton <noloader@...il.com>,
        Stephan Mueller <smueller@...onox.de>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Willy Tarreau <w@....eu>, Nicolai Stange <nstange@...e.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        Vito Caputo <vcaputo@...garu.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jan Kara <jack@...e.cz>, Ray Strode <rstrode@...hat.com>,
        William Jon McCann <mccann@....edu>,
        zhangjs <zachary@...shancloud.com>,
        Florian Weimer <fweimer@...hat.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Peter Matthias <matthias.peter@....bund.de>,
        Neil Horman <nhorman@...hat.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Julia Lawall <julia.lawall@...ia.fr>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Andy Lavr <andy.lavr@...il.com>,
        Petr Tesarik <ptesarik@...e.cz>,
        John Haxby <john.haxby@...cle.com>,
        Alexander Lobakin <alobakin@...lbox.org>,
        Jirka Hladky <jhladky@...hat.com>,
        Eric Biggers <ebiggers@...nel.org>
Subject: Re: [PATCH v43 01/15] Linux Random Number Generator

(resending without HTML this time, sorry for a possible duplicate)
вт, 11 янв. 2022 г. в 09:13, Matthew Garrett <mjg59@...f.ucam.org>:
> The goal is to identify a solution that avoids the enterprise kernels
> needing to do their own thing. They're in a position to globally
> LD_PRELOAD something to thunk getrandom() to improve compatibility if
> they want to, and they're also able to define the expected level of
> breakage if you enable FIPS mode. An approach that allows a single
> kernel to provide different policies in different contexts (eg,
> different namespaces could have different device nodes providing
> /dev/random) makes it easier to configure that based on customer
> requirements.

LD_PRELOAD is not a solution because of containers (that need to be
modified to make use of the preloadable library) and statically-linked
binaries.

-- 
Alexander E. Patrakov