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=-12.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 B86A3C47094 for ; Mon, 7 Jun 2021 19:23:03 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 538FB61130 for ; Mon, 7 Jun 2021 19:23:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 538FB61130 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=linux-audit-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623093782; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=1fJgYZl81qqYF4IcTiJXsNZ1saN+d3mLgqjyvHqFqvE=; b=TCqTh5IbxAWuocicR4LsKGQBCS/khcXTQ9u8ckohHZNFP5NRX5ZbfpP8+rsJbESEf2RVdc D4C09tHdpVOkSFP7e5sc/TyPUKjeOMaZorHfxj8afFQ1lgoY0JamAuCZMjWJ+u8Mfr5W1w 0GHKPkg4d6nci3wur88iqdzq6pV4P/E= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-411-FrkHnYRLPneyqbDi6qkXiQ-1; Mon, 07 Jun 2021 15:23:01 -0400 X-MC-Unique: FrkHnYRLPneyqbDi6qkXiQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id BF9451020C2E; Mon, 7 Jun 2021 19:22:56 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5DE1960C04; Mon, 7 Jun 2021 19:22:56 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 229771801265; Mon, 7 Jun 2021 19:22:55 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 157JMrns001715 for ; Mon, 7 Jun 2021 15:22:53 -0400 Received: by smtp.corp.redhat.com (Postfix) id 994D71000324; Mon, 7 Jun 2021 19:22:53 +0000 (UTC) Received: from madcap2.tricolour.ca (unknown [10.3.128.13]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 825FE10013C1; Mon, 7 Jun 2021 19:22:46 +0000 (UTC) Date: Mon, 7 Jun 2021 15:22:43 -0400 From: Richard Guy Briggs To: Steve Grubb Subject: Re: Unhelpful events Message-ID: <20210607192243.GZ2268484@madcap2.tricolour.ca> References: <5718463.lOV4Wx5bFT@x2> <20210607174249.GX2268484@madcap2.tricolour.ca> <3112762.aeNJFYEL58@x2> MIME-Version: 1.0 In-Reply-To: <3112762.aeNJFYEL58@x2> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-loop: linux-audit@redhat.com Cc: linux-audit@redhat.com X-BeenThere: linux-audit@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Linux Audit Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=linux-audit-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 2021-06-07 14:38, Steve Grubb wrote: > On Monday, June 7, 2021 1:42:49 PM EDT Richard Guy Briggs wrote: > > On 2021-06-07 11:32, Steve Grubb wrote: > > > Hello, > > > > > > While patching up the event normalizer, I run across these events which > > > really have no useful information: > > > > > > type=BPF msg=audit(1622913714.840:15017): prog-id=137 op=UNLOAD > > > > > > type=TIME_INJOFFSET msg=audit(1622547739.500:4): sec=0 nsec=486383948 > > > > Fedora? "-a task,never"? > > Nope. It is event #4. Does this even need to be sent? A TIME_INJOFFSET with > no supporting info is not helpful. I'm guessing that matching op=LOAD was done by systemd/init PID=1. > > I assume ghak120 should be present in what you are using by now (v5.11)? > > 5.12.8 Ok, that rules out that possibility. > > https://github.com/linux-audit/audit-kernel/issues/120 > > "BUG: accompanying records missing for requried records when no rules > > present" > > There is no syscall anywhere near this: > > type=SERVICE_STOP msg=audit(06/06/2021 08:44:53.922:973) : pid=1 uid=root > auid=unset ses=unset subj=system_u:system_r:init_t:s0 msg='unit=systemd- > hostnamed comm=systemd exe=/usr/lib/systemd/systemd hostname=? addr=? > terminal=? res=success' > ---- > type=NETFILTER_CFG msg=audit(06/06/2021 08:44:53.947:974) : table=nat > family=bridge entries=0 op=xt_unregister pid=5833 > subj=system_u:system_r:kernel_t:s0 comm=kworker/u16:3 > ---- > type=NETFILTER_CFG msg=audit(06/06/2021 08:44:53.947:975) : table=broute > family=bridge entries=0 op=xt_unregister pid=5833 > subj=system_u:system_r:kernel_t:s0 comm=kworker/u16:3 > ---- > type=NETFILTER_CFG msg=audit(06/06/2021 08:44:53.947:976) : table=filter > family=bridge entries=0 op=xt_unregister pid=5833 > subj=system_u:system_r:kernel_t:s0 comm=kworker/u16:3 These three would have been preceeded by an op=xt_register event that may not have been logged up to 30 seconds earlier. > > > type=NETFILTER_CFG msg=audit(06/06/2021 08:44:53.947:976) : table=filter > > > family=bridge entries=0 op=xt_unregister pid=5833 > > > subj=system_u:system_r:kernel_t:s0 comm=kworker/u16:3 > > > This is as complete as this event is going to get. It is a kernel > > event, reaping an unused table after a timeout. See > > https://github.com/linux-audit/audit-kernel/issues/25 > > auid=-1 ses=-1 was it successful? Sounds like it needs a "success" field that will be a duplicate of the same field when a SYSCALL record is present. I have also seen a NETFILTER_CFG op=xt_register (event#5) that was systemd/init PID=1 or a hard-linked kernel module (rather than loadable initiated by userspace) that was kernel-initiated. > Was the BPF event succesful? Is there the equivalent of a task struct for BPF > programs that tells anything about who it belonged to? The BPF unload events appear to be in the same situation as the type=NETFILTER_CFG op=xt_unregister events, kernel-initiated, matched with an op=LOAD event by prog-id= field with full details. Perhaps it also needs pid= subj= comm= and success= fields. > -Steve > > > > Either their syscall record is missing or they simply do not have all the > > > necessary information. (Subject, action, object, results) > > > > > > -Steve > > > > - RGB - RGB -- Richard Guy Briggs Sr. S/W Engineer, Kernel Security, Base Operating Systems Remote, Ottawa, Red Hat Canada IRC: rgb, SunRaycer Voice: +1.647.777.2635, Internal: (81) 32635 -- Linux-audit mailing list Linux-audit@redhat.com https://listman.redhat.com/mailman/listinfo/linux-audit