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=-2.1 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_MUTT autolearn=ham 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 DDC6EC43142 for ; Sun, 29 Jul 2018 00:30:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A31C20842 for ; Sun, 29 Jul 2018 00:30:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=thunk.org header.i=@thunk.org header.b="RyJCqKb4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7A31C20842 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mit.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731767AbeG2B7M (ORCPT ); Sat, 28 Jul 2018 21:59:12 -0400 Received: from imap.thunk.org ([74.207.234.97]:38930 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731558AbeG2B7L (ORCPT ); Sat, 28 Jul 2018 21:59:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=thunk.org; s=ef5046eb; h=Content-Type:MIME-Version:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=gu10ZKH1wxiDcFftUCAEyp6OppT7gFusGDVaUJ+FjJY=; b=RyJCqKb4efLWJGENacnkfFUgyQ M9Qf+RSia3mrWTlrm91o7HWCt8Pav/Fjr3Mq62VQRXecz+2dle9ysHOF5EV0PvQ7MS3xAlStg5trc Dmne/TUQQbZsDFCtca+oMgaGvNX+OMOUja2ILPby2PstkXndpZenbF3spQFB8XT6Fezs=; Received: from root (helo=callcc.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.89) (envelope-from ) id 1fjZbk-0000mB-2k; Sun, 29 Jul 2018 00:30:48 +0000 Received: by callcc.thunk.org (Postfix, from userid 15806) id D3FDA7A6174; Sat, 28 Jul 2018 20:30:46 -0400 (EDT) Date: Sat, 28 Jul 2018 20:30:46 -0400 From: "Theodore Y. Ts'o" To: torvalds@linux-foundation.org Cc: linux-kernel@vger.kernel.org Subject: [GIT PULL] random fixes for 4.18-rc7 Message-ID: <20180729003046.GA24909@thunk.org> Mail-Followup-To: "Theodore Y. Ts'o" , torvalds@linux-foundation.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following changes since commit 1e4b044d22517cae7047c99038abb444423243ca: Linux 4.18-rc4 (2018-07-08 16:34:02 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random.git tags/random_for_linus_stable for you to fetch changes up to 81e69df38e2911b642ec121dec319fad2a4782f3: random: mix rdrand with entropy sent in from userspace (2018-07-17 21:32:36 -0400) ---------------------------------------------------------------- In reaction to the fixes to address CVE-2018-1108, some Linux distributions that have certain systemd versions in some cases combined with patches to libcrypt for FIPS/FEDRAMP compliance, have led to boot-time stalls for some hardware. The reaction by some distros and Linux sysadmins has been to install packages that try to do complicated things with the CPU and hope that leads to randomness. To mitigate this, if RDRAND is available, mix it into entropy provided by userspace. It won't hurt. and it will probably help. ---------------------------------------------------------------- Theodore Ts'o (1): random: mix rdrand with entropy sent in from userspace drivers/char/random.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)