Re: [PATCH bpf-next v3 1/2] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling

[David Windsor]

On Mon, Jun 22, 2026 at 11:59 PM Alexei Starovoitov
<alexei.starovoitov@xxxxxxxxx> wrote:
>
> >
> > > > diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
> > > > index 1a721fc4bef5..b41b02173e24 100644
> > > > --- a/kernel/bpf/trampoline.c
> > > > +++ b/kernel/bpf/trampoline.c
> > > > @@ -859,6 +859,9 @@ static int bpf_trampoline_add_prog(struct bpf_trampoline *tr,
> > > >       }
> > > >       if (cnt >= BPF_MAX_TRAMP_LINKS)
> > > >               return -E2BIG;
> > > > +     if (node->link->prog->aux->attach_limit &&
> > > > +         tr->progs_cnt[kind] >= node->link->prog->aux->attach_limit)
> > > > +             return -E2BIG;
> > >
> > > No need. The check inside kfunc is enough.
> > >
> >
> > Paul wanted this check because it occurs at bpf prog attach time,
> > whereas the one in the kfunc is at inode creation time.
>
> Sorry, we're not adding redundant code to the verifier.

Thanks, will send v4 soon.