Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752648AbdGEHPZ convert rfc822-to-8bit (ORCPT ); Wed, 5 Jul 2017 03:15:25 -0400 Received: from rrzmta1.uni-regensburg.de ([194.94.155.51]:44008 "EHLO rrzmta1.uni-regensburg.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752274AbdGEHPW (ORCPT ); Wed, 5 Jul 2017 03:15:22 -0400 Message-Id: <595C9079020000A100026F37@gwsmtp1.uni-regensburg.de> X-Mailer: Novell GroupWise Internet Agent 14.2.2 Date: Wed, 05 Jul 2017 09:08:41 +0200 From: "Ulrich Windl" To: "Lee Duncan" Cc: "David Miller" , "Eric Biggers" , "open-iscsi" , "Nicholas A.Bellinger" , "Greg Kroah-Hartman" , "kernel-hardening@lists.openwall.com" , "Ted Ts'o" , "Chris Leech" , "Linux Crypto Mailing List" , , "Jason A.Donenfeld" Subject: Antw: Re: [kernel-hardening] Re: [PATCH v4 06/13] iscsi: ensure RNG is seeded before use References: <20170606174804.31124-1-Jason@zx2c4.com> <20170606174804.31124-7-Jason@zx2c4.com> <20170608024357.fhyyentj2qm7ti2q@thunk.org> <02d60ed4-4207-dd7d-8826-0f9f7f4e966d@suse.com> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1055 Lines: 26 >>> Jeffrey Walton schrieb am 17.06.2017 um 16:23 in Nachricht : [...] > But its not clear to me how to ensure uniqueness when its based on > randomness from the generators. Even with a perfect random generator non-unique values are possible (that's why it's random). It's unlikely, but it can happen. The question is whether the probability of non-unique values from /dev/urandom is any higher than that for values read from /dev/random. One _might_ be able to predict the values from /dev/urandom. Regards, Ulrich > > Jeff > > -- > You received this message because you are subscribed to the Google Groups > "open-iscsi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to open-iscsi+unsubscribe@googlegroups.com. > To post to this group, send email to open-iscsi@googlegroups.com. > Visit this group at https://groups.google.com/group/open-iscsi. > For more options, visit https://groups.google.com/d/optout.