Re: [PATCHv3] bpf: Emit audit messages upon successful prog load and unload

On Mon, Dec 9, 2019 at 6:19 PM Daniel Borkmann <daniel(a)iogearbox.net&gt; wrote: > On 12/9/19 3:56 PM, Paul Moore wrote: > > On Mon, Dec 9, 2019 at 7:15 AM Daniel Borkmann <daniel(a)iogearbox.net&gt; wrote: > >> On Fri, Dec 06, 2019 at 10:49:34PM +0100, Jiri Olsa wrote: > >>> From: Daniel Borkmann <daniel(a)iogearbox.net&gt; > >>> > >>> Allow for audit messages to be emitted upon BPF program load and > >>> unload for having a timeline of events. The load itself is in > >>> syscall context, so additional info about the process initiating > >>> the BPF prog creation can be logged and later directly correlated > >>> to the unload event. > >>> > >>> The only info really needed from BPF side is the globally unique > >>> prog ID where then audit user space tooling can query / dump all > >>> info needed about the specific BPF program right upon load event > >>> and enrich the record, thus these changes needed here can be kept > >>> small and non-intrusive to the core. > >>> > >>> Raw example output: > >>> > >>> # auditctl -D > >>> # auditctl -a always,exit -F arch=x86_64 -S bpf > >>> # ausearch --start recent -m 1334 > >>> ... > >>> ---- > >>> time->Wed Nov 27 16:04:13 2019 > >>> type=PROCTITLE msg=audit(1574867053.120:84664): proctitle="./bpf" > >>> type=SYSCALL msg=audit(1574867053.120:84664): arch=c000003e syscall=321 \ > >>> success=yes exit=3 a0=5 a1=7ffea484fbe0 a2=70 a3=0 items=0 ppid=7477 \ > >>> pid=12698 auid=1001 uid=1001 gid=1001 euid=1001 suid=1001 fsuid=1001 \ > >>> egid=1001 sgid=1001 fsgid=1001 tty=pts2 ses=4 comm="bpf" \ > >>> exe="/home/jolsa/auditd/audit-testsuite/tests/bpf/bpf" \ > >>> subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) > >>> type=UNKNOWN[1334] msg=audit(1574867053.120:84664): prog-id=76 op=LOAD > >>> ---- > >>> time->Wed Nov 27 16:04:13 2019 > >>> type=UNKNOWN[1334] msg=audit(1574867053.120:84665): prog-id=76 op=UNLOAD > >>> ... > >>> > >>> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net&gt; > >>> Co-developed-by: Jiri Olsa <jolsa(a)kernel.org&gt; > >>> Signed-off-by: Jiri Olsa <jolsa(a)kernel.org&gt; > >> > >> Paul, Steve, given the merge window is closed by now, does this version look > >> okay to you for proceeding to merge into bpf-next? > > > > Given the change to audit UAPI I was hoping to merge this via the > > audit/next tree, is that okay with you? > > Hm, my main concern is that given all the main changes are in BPF core and > usually the BPF subsystem has plenty of changes per release coming in that we'd > end up generating unnecessary merge conflicts. Given the include/uapi/linux/audit.h > UAPI diff is a one-line change, my preference would be to merge via bpf-next with > your ACK or SOB added. Does that work for you as well as? I regularly (a few times a week) run the audit and SELinux tests against Linus+audit/next+selinux/next to make sure things are working as expected and that some other subsystem has introduced a change which has broken something. If you are willing to ensure the tests get run, including your new BPF audit tests I would be okay with that; is that acceptable?