Re: [PATCH net 03/16] net/sched: act_csum: validate the control action inside init()

[Cong Wang]

On Wed, Feb 27, 2019 at 9:41 AM Davide Caratti <dcara...@redhat.com> wrote:
> @@ -108,7 +116,16 @@ static int tcf_csum_init(struct net *net, struct nlattr 
> *nla,
>         if (ret == ACT_P_CREATED)
>                 tcf_idr_insert(tn, *a);
>
> +       if (oldchain)
> +               tcf_chain_put_by_act(oldchain);


Do we need to respect RCU grace period here?

Same question for other patches on similar paths.