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

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Date:   Mon, 22 Nov 2021 07:02:14 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Stephan Mueller <smueller@...onox.de>
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>, Tso Ted <tytso@....edu>,
        linux-crypto@...r.kernel.org, Willy Tarreau <w@....eu>,
        Nicolai Stange <nstange@...e.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        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>,
        Andy Lutomirski <luto@...nel.org>,
        Florian Weimer <fweimer@...hat.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Peter Matthias <matthias.peter@....bund.de>,
        Marcelo Henrique Cerri <marcelo.cerri@...onical.com>,
        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>,
        Eric Biggers <ebiggers@...nel.org>,
        Petr Tesarik <ptesarik@...e.cz>,
        John Haxby <john.haxby@...cle.com>,
        Alexander Lobakin <alobakin@...lbox.org>,
        Jirka Hladky <jhladky@...hat.com>
Subject: Re: [PATCH v43 01/15] Linux Random Number Generator

On Mon, Nov 22, 2021 at 06:34:43AM +0100, Stephan Mueller wrote:
> Am Sonntag, 21. November 2021, 23:42:33 CET schrieb Jason A. Donenfeld:
> 
> Hi Jason,
> 
> > Hi Stephan,
> > 
> > You've posted it again, and yet I still believe this is not the
> > correct design or direction. I do not think the explicit goal of
> > extended configurability ("flexibility") or the explicit goal of being
> > FIPS compatible represent good directions, and I think this introduces
> > new problems rather than solving any existing ones.
> 
> The members from the Linux distributions that are on copy on this may tell you 
> a different story. They all developed their own downstream patches to somehow 
> add the flexibility that is needed for them. So, we have a great deal of 
> fragmentation at the resting-foundation of Linux cryptography.

What distros specifically have patches in their kernels that do
different things to the random code path?  Do you have pointers to those
patches anywhere?  Why have the distros not submitted their changes
upstream?

thanks,

greg k-h