Re: [PATCH v2 net-next 6/7] bpf: allow eBPF programs to use maps

From: Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
Date: Sun, 16 Nov 2014 13:24:53 -0800

The requirement that _unprivileged_ programs should
not be able to pass all these pointers back to user is
well understood and was discussed in detail several
month back. It's verifier that will prevent leaking of
kernel addresses.

Ok, fair enough.