lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAPhsuW43EiH0tVKU8s+JwV_V6EBETTDyXsAmMzAftpVtcgLHag@mail.gmail.com>
Date:   Mon, 27 Mar 2023 12:03:56 -0700
From:   Song Liu <song@...nel.org>
To:     Yafang Shao <laoar.shao@...il.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH bpf-next 00/13] bpf: Introduce BPF namespace

On Sun, Mar 26, 2023 at 2:22 AM Yafang Shao <laoar.shao@...il.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, but
> 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?

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

Thanks,
Song

[1] https://lpc.events/event/16/contributions/1237/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ