From: Eric Dumazet <eduma...@google.com>
Date: Sat, 18 Jun 2016 16:26:40 -0700
> @@ -588,12 +594,26 @@ int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int
> nhs, int type)
> skb2->dev = rt->dst.dev;
>
> ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, &temp_saddr);
> +
> + if (data_len) {
> + /* RFC 4884 (partial) support :
> + * insert 0 padding at the end, before the extensions
> + */
> + __skb_push(skb2, nhs);
> + skb_reset_network_header(skb2);
> + memcpy(skb2->data, skb2->data + nhs, data_len - nhs);
Since this is overlapping, it really need to use memmove() instead of
memcpy().
