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Commit 860239c5 authored by Wei Yongjun's avatar Wei Yongjun Committed by Gerrit Renker
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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: default avatarWei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
parent 18e1d836

net/dccp/ipv6.c

+6 −0
Original line number Diff line number Diff line
@@ -96,6 +96,12 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 
	__u64 seq;

	struct net *net = dev_net(skb->dev);



	if (skb->len < offset + sizeof(*dh) ||

	    skb->len < offset + __dccp_basic_hdr_len(dh)) {

		ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);

		return;

	}



	sk = inet6_lookup(net, &dccp_hashinfo,

			&hdr->daddr, dh->dccph_dport,

			&hdr->saddr, dh->dccph_sport, inet6_iif(skb));