[IPV6]: Ensure to have hop-by-hop options in our header of &sk_buff.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -489,6 +489,18 @@ int ipv6_parse_hopopts(struct sk_buff *skb, int nhoff)
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{
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{
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struct inet6_skb_parm *opt = IP6CB(skb);
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struct inet6_skb_parm *opt = IP6CB(skb);
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/*
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* skb->nh.raw is equal to skb->data, and
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* skb->h.raw - skb->nh.raw is always equal to
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* sizeof(struct ipv6hdr) by definition of
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* hop-by-hop options.
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*/
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if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) ||
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!pskb_may_pull(skb, sizeof(struct ipv6hdr) + ((skb->h.raw[1] + 1) << 3))) {
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kfree_skb(skb);
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return -1;
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}
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opt->hop = sizeof(struct ipv6hdr);
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opt->hop = sizeof(struct ipv6hdr);
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if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
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if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
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skb->h.raw += (skb->h.raw[1]+1)<<3;
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skb->h.raw += (skb->h.raw[1]+1)<<3;
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