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Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs

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Hi Alexei,

On Thu, Oct 8, 2015, at 07:23, Alexei Starovoitov wrote:
> The feature is controlled by sysctl kernel.unprivileged_bpf_disabled.
> This toggle defaults to off (0), but can be set true (1).  Once true,
> bpf programs and maps cannot be accessed from unprivileged process,
> and the toggle cannot be set back to false.

This approach seems fine to me.

I am wondering if it makes sense to somehow allow ebpf access per
namespace? I currently have no idea how that could work and on which
namespace type to depend or going with a prctl or even cgroup maybe. The
rationale behind this is, that maybe some namespaces like openstack
router namespaces could make usage of advanced ebpf capabilities in the
kernel, while other namespaces, especially where untrusted third parties
are hosted, shouldn't have access to those facilities.

In that way, hosters would be able to e.g. deploy more efficient
performance monitoring container (which should still need not to run as
root) while the majority of the users has no access to that. Or think
about routing instances in some namespaces, etc. etc.

Thanks,
Hannes
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Thread

[PATCH v2 net-next 0/3] bpf: unprivileged Alexei Starovoitov <ast@plumgrid.com> - 2015-10-08 07:30 +0200
  [PATCH v2 net-next 3/3] bpf: add unprivileged bpf tests Alexei Starovoitov <ast@plumgrid.com> - 2015-10-08 07:30 +0200
    Re: [PATCH v2 net-next 3/3] bpf: add unprivileged bpf tests Kees Cook <keescook@chromium.org> - 2015-10-08 19:50 +0200
      Re: [PATCH v2 net-next 3/3] bpf: add unprivileged bpf tests Alexei Starovoitov <ast@plumgrid.com> - 2015-10-08 20:00 +0200
  [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Alexei Starovoitov <ast@plumgrid.com> - 2015-10-08 07:30 +0200
    Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Kees Cook <keescook@chromium.org> - 2015-10-08 19:50 +0200
    Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Hannes Frederic Sowa <hannes@stressinduktion.org> - 2015-10-08 20:30 +0200
      Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Alexei Starovoitov <ast@plumgrid.com> - 2015-10-09 00:10 +0200
        Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Hannes Frederic Sowa <hannes@stressinduktion.org> - 2015-10-09 13:50 +0200
          Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Alexei Starovoitov <ast@plumgrid.com> - 2015-10-09 19:40 +0200
            Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Daniel Borkmann <daniel@iogearbox.net> - 2015-10-09 19:50 +0200
              Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Alexei Starovoitov <ast@plumgrid.com> - 2015-10-09 20:00 +0200
      Re: [PATCH v2 net-next 1/3] bpf: enable non-root eBPF programs Thomas Graf <tgraf@suug.ch> - 2015-10-09 11:30 +0200
  Re: [PATCH v2 net-next 0/3] bpf: unprivileged David Miller <davem@davemloft.net> - 2015-10-13 04:10 +0200

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