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From:   Yafang Shao <laoar.shao@gmail.com>
Date:   Tue, 28 Mar 2023 11:47:31 +0800
Message-ID: <CALOAHbCqCb3xmSpNe1Qvm75GBY4ZEGrAOHfVJvpZV5t=akTTgQ@mail.gmail.com>
Subject: Re: [RFC PATCH bpf-next 00/13] bpf: Introduce BPF namespace
To:     Song Liu <song@kernel.org>
Cc:     ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
        kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
        john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
        haoluo@google.com, jolsa@kernel.org, bpf@vger.kernel.org,
        linux-kernel@vger.kernel.org
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On Tue, Mar 28, 2023 at 3:04=E2=80=AFAM Song Liu <song@kernel.org> wrote:
>
> On Sun, Mar 26, 2023 at 2:22=E2=80=AFAM Yafang Shao <laoar.shao@gmail.com=
> wrote:
> >
> > Currently only CAP_SYS_ADMIN can iterate BPF object IDs and convert IDs
> > to FDs, that's intended for BPF's security model[1]. Not only does it
> > prevent non-privilidged users from getting other users' bpf program, bu=
t
> > also it prevents the user from iterating his own bpf objects.
> >
> > In container environment, some users want to run bpf programs in their
> > containers. These users can run their bpf programs under CAP_BPF and
> > some other specific CAPs, but they can't inspect their bpf programs in =
a
> > generic way. For example, the bpftool can't be used as it requires
> > CAP_SYS_ADMIN. That is very inconvenient.
>
> Agreed that it is important to enable tools like bpftool without
> CAP_SYS_ADMIN. However, I am not sure whether we need a new
> namespace for this. Can we reuse some existing namespace for this?
>

It seems we can't.

> If we do need a new namespace, maybe we should share some effort
> with tracer namespace proposal [1]?
>

Thanks for your information. I will learn the tracer namespace first
and try to analyze how to cooperate with it.

> Thanks,
> Song
>
> [1] https://lpc.events/event/16/contributions/1237/


--=20
Regards
Yafang