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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 73593C4CECF for ; Mon, 23 Sep 2019 19:49:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43C6720665 for ; Mon, 23 Sep 2019 19:49:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2502431AbfIWTtz (ORCPT ); Mon, 23 Sep 2019 15:49:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52486 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2502394AbfIWTtz (ORCPT ); Mon, 23 Sep 2019 15:49:55 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 147E48980F5; Mon, 23 Sep 2019 19:49:55 +0000 (UTC) Received: from localhost.localdomain (unknown [10.11.216.102]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4CD911001B05; Mon, 23 Sep 2019 19:49:52 +0000 (UTC) Message-ID: Subject: Re: ntp audit spew. From: Eric Paris To: Dave Jones , Paul Moore Cc: Linux Kernel , linux-audit@redhat.com Date: Mon, 23 Sep 2019 15:49:52 -0400 In-Reply-To: <20190923194901.GA2787@codemonkey.org.uk> References: <20190923155041.GA14807@codemonkey.org.uk> <20190923165806.GA21466@codemonkey.org.uk> <20190923194901.GA2787@codemonkey.org.uk> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.0 (3.34.0-1.fc31) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.67]); Mon, 23 Sep 2019 19:49:55 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Is this the thing where systemd is listening on the multicast netlink socket and causes everything to come out kmesg as well? On Mon, 2019-09-23 at 15:49 -0400, Dave Jones wrote: > On Mon, Sep 23, 2019 at 02:57:08PM -0400, Paul Moore wrote: > > On Mon, Sep 23, 2019 at 12:58 PM Dave Jones < > davej@codemonkey.org.uk> wrote: > > > On Mon, Sep 23, 2019 at 12:14:14PM -0400, Paul Moore wrote: > > > > On Mon, Sep 23, 2019 at 11:50 AM Dave Jones < > davej@codemonkey.org.uk> wrote: > > > > > > > > > > I have some hosts that are constantly spewing audit > messages like so: > > > > > > > > > > [46897.591182] audit: type=1333 audit(1569250288.663:220): > op=offset old=2543677901372 new=2980866217213 > > > > > [46897.591184] audit: type=1333 audit(1569250288.663:221): > op=freq old=-2443166611284 new=-2436281764244 > > > > > [48850.604005] audit: type=1333 audit(1569252241.675:222): > op=offset old=1850302393317 new=3190241577926 > > > > > [48850.604008] audit: type=1333 audit(1569252241.675:223): > op=freq old=-2436281764244 new=-2413071187316 > > > > > [49926.567270] audit: type=1333 audit(1569253317.638:224): > op=offset old=2453141035832 new=2372389610455 > > > > > [49926.567273] audit: type=1333 audit(1569253317.638:225): > op=freq old=-2413071187316 new=-2403561671476 > > > > > > > > > > This gets emitted every time ntp makes an adjustment, which > is apparently very frequent on some hosts. > > > > > > > > > > > > > > > Audit isn't even enabled on these machines. > > > > > > > > > > # auditctl -l > > > > > No rules > > > > > > > > What happens when you run 'auditctl -a never,task'? That > *should* > > > > silence those messages as the audit_ntp_log() function has > the > > > > requisite audit_dummy_context() check. > > > > > > They still get emitted. > > > > > > > FWIW, this is the distro > > > > default for many (most? all?) distros; for example, check > > > > /etc/audit/audit.rules on a stock Fedora system. > > > > > > As these machines aren't using audit, they aren't running auditd > either. > > > Essentially: nothing enables audit, but the kernel side > continues to log > > > ntp regardless (no other audit messages seem to do this). > > > > What does your kernel command line look like? Do you have > "audit=1" > > somewhere in there? > > nope. > > ro root=LABEL=/ biosdevname=0 net.ifnames=0 fsck.repair=yes > systemd.gpt_auto=0 pcie_pme=nomsi ipv6.autoconf=0 erst_disable > crashkernel=128M console=tty0 console=ttyS1,57600 > intel_iommu=tboot_noforce > > Dave >