linux-kernel - Re: [PATCH bpf v2] restore behaviour of CAP_SYS_ADMIN allowing the loading of networking bpf programs

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Message-ID: <CALAqxLVfxSj961C5muL5iAYjB5p_JTx7T6E7zQ7nsfQGC-exFA@mail.gmail.com>
Date:   Mon, 6 Jul 2020 13:11:42 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Maciej Żenczykowski <zenczykowski@...il.com>,
        Maciej Żenczykowski <maze@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Network Development Mailing List 
        <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        BPF Mailing List <bpf@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH bpf v2] restore behaviour of CAP_SYS_ADMIN allowing the
 loading of networking bpf programs

On Tue, Jun 23, 2020 at 5:54 PM Alexei Starovoitov
<alexei.starovoitov@...il.com> wrote:
> On Mon, Jun 22, 2020 at 12:44 PM John Stultz <john.stultz@...aro.org> wrote:
> > On Sat, Jun 20, 2020 at 2:26 PM Maciej Żenczykowski
> > <zenczykowski@...il.com> wrote:
> > > From: Maciej Żenczykowski <maze@...gle.com>
> > >
> > > This is a fix for a regression introduced in 5.8-rc1 by:
> > >   commit 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366
> > >   'bpf: Implement CAP_BPF'
> > >
> > > Before the above commit it was possible to load network bpf programs
> > > with just the CAP_SYS_ADMIN privilege.
> > >
> > > The Android bpfloader happens to run in such a configuration (it has
> > > SYS_ADMIN but not NET_ADMIN) and creates maps and loads bpf programs
> > > for later use by Android's netd (which has NET_ADMIN but not SYS_ADMIN).
> > >
> > > Cc: Alexei Starovoitov <ast@...nel.org>
> > > Cc: Daniel Borkmann <daniel@...earbox.net>
> > > Reported-by: John Stultz <john.stultz@...aro.org>
> > > Fixes: 2c78ee898d8f ("bpf: Implement CAP_BPF")
> > > Signed-off-by: Maciej Żenczykowski <maze@...gle.com>
> >
> > Thanks so much for helping narrow this regression down and submitting this fix!
> > It's much appreciated!
> >
> > Tested-by: John Stultz <john.stultz@...aro.org>
>
> Applied to bpf tree. Thanks

Hey all,
  Just wanted to follow up on this as I've not seen the regression fix
land in 5.8-rc4 yet? Is it still pending, or did it fall through a
gap?

thanks
-john