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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 2B8BFC5517A for ; Mon, 9 Nov 2020 07:55:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D467720853 for ; Mon, 9 Nov 2020 07:55:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729713AbgKIHzD (ORCPT ); Mon, 9 Nov 2020 02:55:03 -0500 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:46949 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728904AbgKIHzD (ORCPT ); Mon, 9 Nov 2020 02:55:03 -0500 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 0A97sANl013929; Mon, 9 Nov 2020 08:54:10 +0100 Date: Mon, 9 Nov 2020 08:54:10 +0100 From: Willy Tarreau To: Amit Klein Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Eric Dumazet , "Jason A. Donenfeld" , Andy Lutomirski , Kees Cook , Thomas Gleixner , Peter Zijlstra , Linus Torvalds , tytso@mit.edu, Florian Westphal , Marc Plumb , George Spelvin , Sasha Levin Subject: Re: [PATCH 5.9 639/757] random32: make prandom_u32() output unpredictable Message-ID: <20201109075410.GA13916@1wt.eu> References: <20201027135450.497324313@linuxfoundation.org> <20201027135520.535662993@linuxfoundation.org> <20201109062012.GA48368@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.6.1 (2016-04-27) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 09, 2020 at 08:54:13AM +0200, Amit Klein wrote: > Unfortunately, I'm just a security researcher, not a kernel developer... > > Does that mean you don't plan to back-port the patch? I could possibly have a look, but quite frankly I'm not convinced that we need to backport this at all. I think that what we've done is mostly to be future-proof and that the likelihood of practical attacks against live systems with the previous fix are close to zero. Cheers, Willy