[PATCH bpf-next v1 00/13] MAC and Audit policy using eBPF (KRSI)
gregkh at linuxfoundation.org
Thu Jan 9 18:23:24 UTC 2020
On Fri, Jan 10, 2020 at 05:11:38AM +1100, James Morris wrote:
> On Wed, 8 Jan 2020, Stephen Smalley wrote:
> > The cover letter subject line and the Kconfig help text refer to it as a
> > BPF-based "MAC and Audit policy". It has an enforce config option that
> > enables the bpf programs to deny access, providing access control. IIRC, in
> > the earlier discussion threads, the BPF maintainers suggested that Smack and
> > other LSMs could be entirely re-implemented via it in the future, and that
> > such an implementation would be more optimal.
> In this case, the eBPF code is similar to a kernel module, rather than a
> loadable policy file. It's a loadable mechanism, rather than a policy, in
> my view.
> This would be similar to the difference between iptables rules and
> loadable eBPF networking code. I'd be interested to know how the
> eBPF networking scenarios are handled wrt kernel ABI.
I already know of some people who pre-compile ebpf programs based on a
number of "supported" kernel versions and then load the needed one at
Messy, yes, but you are right, ebpf code is much more similiar to a
kernel module than userspace code at the moment.
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