This patch adds a minimum-length check for ICMPv6 packets, to allow meaningful
DCCP sequence number checks, as per the previous patch for ICMPv4 payloads.
Signed-off-by: Wei Yongjun <yjwei@xxxxxxxxxxxxxx>
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/ipv6.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -96,6 +96,11 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
__u64 seq;
struct net *net = dev_net(skb->dev);
+ if (dccp_skb_too_short(skb, offset)) {
+ 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));
--
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