Re: [PATCH v2 bpf-next 1/3] capability: introduce CAP_BPF and CAP_TRACING

Alexei Starovoitov [off-list ref] writes:

On Thu, Aug 29, 2019 at 09:44:18AM +0200, Toke Høiland-Jørgensen wrote:

quoted

Alexei Starovoitov [off-list ref] writes:

quoted

CAP_BPF allows the following BPF operations:
- Loading all types of BPF programs
- Creating all types of BPF maps except:
   - stackmap that needs CAP_TRACING
   - devmap that needs CAP_NET_ADMIN
   - cpumap that needs CAP_SYS_ADMIN

Why CAP_SYS_ADMIN instead of CAP_NET_ADMIN for cpumap?

Currently it's cap_sys_admin and I think it should stay this way
because it creates kthreads.

Ah, right. I can sorta see that makes sense because of the kthreads, but
it also means that you can use all of XDP *except* cpumap with
CAP_NET_ADMIN+CAP_BPF. That is bound to create confusion, isn't it?

-Toke