Re: [PATCH bpf-next 2/3] bpf: don't require CAP_SYS_ADMIN for getting NEXT_ID

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On Thu, May 25, 2023 at 10:11 AM Alexei Starovoitov
<alexei.starovoitov@xxxxxxxxx> wrote:
>
> On Thu, May 25, 2023 at 10:05 AM Andrii Nakryiko
> <andrii.nakryiko@xxxxxxxxx> wrote:
> >
> > On Wed, May 24, 2023 at 8:23 PM Alexei Starovoitov
> > <alexei.starovoitov@xxxxxxxxx> wrote:
> > >
> > > On Wed, May 24, 2023 at 3:55 PM Andrii Nakryiko <andrii@xxxxxxxxxx> wrote:
> > > >
> > > > Getting ID of map/prog/btf/link doesn't give any access to underlying
> > > > BPF objects, so there is no point in requiring CAP_SYS_ADMIN for these
> > > > commands.
> > >
> > > I don't think it's a good idea to allow unpriv to figure out
> > > all prog/map/btf/link IDs.
> > > Since unpriv is typically disabled it's not a security issue,
> > > but rather a concern over abuse of IDR logic and potential
> > > for exploits in *get_next_id() code.
> > > At least CAP_BPF is needed.
> >
> > Ok, sounds good. I was just trying to minimize the number of commands
> > that would need token_fd.
> >
> > BPF_MAP_FREEZE is the one I care about the most, if that one looks
> > good, should we land that single patch?
>
> Sure. Applied.

Great, thank you!





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