+@@ -39,6 +91,61 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_com
+ return tcp_gro_complete(skb);
+ }
+
++static void __tcpv6_gso_segment_csum(struct sk_buff *seg,
++ __be16 *oldport, __be16 newport)
++{
++ struct tcphdr *th;
++
++ if (*oldport == newport)
++ return;
++
++ th = tcp_hdr(seg);
++ inet_proto_csum_replace2(&th->check, seg, *oldport, newport, false);
++ *oldport = newport;
++}
++
++static struct sk_buff *__tcpv6_gso_segment_list_csum(struct sk_buff *segs)
++{
++ const struct tcphdr *th;
++ const struct ipv6hdr *iph;
++ struct sk_buff *seg;
++ struct tcphdr *th2;
++ struct ipv6hdr *iph2;
++
++ seg = segs;
++ th = tcp_hdr(seg);
++ iph = ipv6_hdr(seg);
++ th2 = tcp_hdr(seg->next);
++ iph2 = ipv6_hdr(seg->next);
++
++ if (!(*(const u32 *)&th->source ^ *(const u32 *)&th2->source) &&
++ ipv6_addr_equal(&iph->saddr, &iph2->saddr) &&
++ ipv6_addr_equal(&iph->daddr, &iph2->daddr))
++ return segs;
++
++ while ((seg = seg->next)) {
++ th2 = tcp_hdr(seg);
++ iph2 = ipv6_hdr(seg);
++
++ iph2->saddr = iph->saddr;
++ iph2->daddr = iph->daddr;
++ __tcpv6_gso_segment_csum(seg, &th2->source, th->source);
++ __tcpv6_gso_segment_csum(seg, &th2->dest, th->dest);
++ }
++
++ return segs;
++}
++
++static struct sk_buff *__tcp6_gso_segment_list(struct sk_buff *skb,
++ netdev_features_t features)
++{
++ skb = skb_segment_list(skb, features, skb_mac_header_len(skb));
++ if (IS_ERR(skb))
++ return skb;
++
++ return __tcpv6_gso_segment_list_csum(skb);
++}
++
+ static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
+ netdev_features_t features)
+ {
+@@ -50,6 +157,9 @@ static struct sk_buff *tcp6_gso_segment(