NFTA_INNER_EXPR
[NFTA_INNER_EXPR] = { .type = NLA_NESTED },
!tb[NFTA_INNER_EXPR])
err = nft_expr_inner_parse(ctx, tb[NFTA_INNER_EXPR], &expr_info);
if (nft_expr_dump(skb, NFTA_INNER_EXPR,