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Thu, 1 Apr 2021 13:42:16 -0400 Received: from orbyte.nwl.cc (orbyte.nwl.cc [IPv6:2001:41d0:e:133a::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4186C08EA3C; Thu, 1 Apr 2021 06:24:49 -0700 (PDT) Received: from n0-1 by orbyte.nwl.cc with local (Exim 4.94) (envelope-from ) id 1lRxJU-0001yJ-EH; Thu, 01 Apr 2021 15:24:44 +0200 Date: Thu, 1 Apr 2021 15:24:44 +0200 From: Phil Sutter To: Richard Guy Briggs Cc: Linux-Audit Mailing List , LKML , netfilter-devel@vger.kernel.org, Paul Moore , Eric Paris , Steve Grubb , Florian Westphal , twoerner@redhat.com, tgraf@infradead.org, dan.carpenter@oracle.com, Jones Desougi Subject: Re: [PATCH v5] audit: log nftables configuration change events once per table Message-ID: <20210401132444.GX3158@orbyte.nwl.cc> Mail-Followup-To: Phil Sutter , Richard Guy Briggs , Linux-Audit Mailing List , LKML , netfilter-devel@vger.kernel.org, Paul Moore , Eric Paris , Steve Grubb , Florian Westphal , twoerner@redhat.com, tgraf@infradead.org, dan.carpenter@oracle.com, Jones Desougi References: <28de34275f58b45fd4626a92ccae96b6d2b4e287.1616702731.git.rgb@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <28de34275f58b45fd4626a92ccae96b6d2b4e287.1616702731.git.rgb@redhat.com> Sender: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 26, 2021 at 01:38:59PM -0400, Richard Guy Briggs wrote: > Reduce logging of nftables events to a level similar to iptables. > Restore the table field to list the table, adding the generation. > > Indicate the op as the most significant operation in the event. > > A couple of sample events: > > type=PROCTITLE msg=audit(2021-03-18 09:30:49.801:143) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid > type=SYSCALL msg=audit(2021-03-18 09:30:49.801:143) : arch=x86_64 syscall=sendmsg success=yes exit=172 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=roo > t sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null) > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv6 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=ipv4 entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.801:143) : table=firewalld:2 family=inet entries=1 op=nft_register_table pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > > type=PROCTITLE msg=audit(2021-03-18 09:30:49.839:144) : proctitle=/usr/bin/python3 -s /usr/sbin/firewalld --nofork --nopid > type=SYSCALL msg=audit(2021-03-18 09:30:49.839:144) : arch=x86_64 syscall=sendmsg success=yes exit=22792 a0=0x6 a1=0x7ffdcfcbe650 a2=0x0 a3=0x7ffdcfcbd52c items=0 ppid=1 pid=367 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=r > oot sgid=root fsgid=root tty=(none) ses=unset comm=firewalld exe=/usr/bin/python3.9 subj=system_u:system_r:firewalld_t:s0 key=(null) > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv6 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=ipv4 entries=30 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > type=NETFILTER_CFG msg=audit(2021-03-18 09:30:49.839:144) : table=firewalld:3 family=inet entries=165 op=nft_register_chain pid=367 subj=system_u:system_r:firewalld_t:s0 comm=firewalld > > The issue was originally documented in > https://github.com/linux-audit/audit-kernel/issues/124 > > Signed-off-by: Richard Guy Briggs Tested this patch to make sure it eliminates the slowdown of iptables-nft when auditd is running. With this applied, neither iptables-nft-restore nor 'iptables-nft -F' show a significant difference in run-time between running or stopped auditd, at least for large rulesets. Individual calls suffer from added audit logging, but that's expected of course. Tested-by: Phil Sutter Thanks, Phil