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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: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
This commit is contained in:
Wei Yongjun 2008-07-26 11:59:11 +01:00 committed by Gerrit Renker
parent 18e1d83600
commit 860239c56b
1 changed files with 6 additions and 0 deletions
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6
net/dccp/ipv6.c
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@ -96,6 +96,12 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
__u64 seq; __u64 seq;
struct net *net = dev_net(skb->dev); 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, sk = inet6_lookup(net, &dccp_hashinfo,
&hdr->daddr, dh->dccph_dport, &hdr->daddr, dh->dccph_dport,
&hdr->saddr, dh->dccph_sport, inet6_iif(skb)); &hdr->saddr, dh->dccph_sport, inet6_iif(skb));