iph = ipv6_hdr(skb);
iph->version = 6;
iph->nexthdr = IPPROTO_IPV6;
- iph->payload_len = old_iph->payload_len + sizeof(old_iph);
+ iph->payload_len = old_iph->payload_len;
+ be16_add_cpu(&iph->payload_len, sizeof(*old_iph));
iph->priority = old_iph->priority;
memset(&iph->flow_lbl, 0, sizeof(iph->flow_lbl));
iph->daddr = rt->rt6i_dst.addr;