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

[Paul Moore]

On Mon, Dec 9, 2019 at 7:15 AM Daniel Borkmann <daniel at iogearbox.net> wrote:
> On Fri, Dec 06, 2019 at 10:49:34PM +0100, Jiri Olsa wrote:
> > From: Daniel Borkmann <daniel at iogearbox.net>
> >
> > 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 at iogearbox.net>
> > Co-developed-by: Jiri Olsa <jolsa at kernel.org>
> > Signed-off-by: Jiri Olsa <jolsa at kernel.org>
>
> 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?

-- 
paul moore
www.paul-moore.com