dccp: Add check for truncated ICMPv6 DCCP error packets
This patch adds a minimum-length check for ICMPv6 packets, as per the previous patch for ICMPv4 payloads. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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@ -96,6 +96,12 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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__u64 seq;
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struct net *net = dev_net(skb->dev);
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if (skb->len < offset + sizeof(*dh) ||
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skb->len < offset + __dccp_basic_hdr_len(dh)) {
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ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
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return;
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}
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sk = inet6_lookup(net, &dccp_hashinfo,
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&hdr->daddr, dh->dccph_dport,
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&hdr->saddr, dh->dccph_sport, inet6_iif(skb));
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