Commit 9e10edd7 authored Jun 27, 2019 by Nikolay Aleksandrov Committed by David S. Miller Jun 29, 2019

net: sched: em_ipt: match only on ip/ipv6 traffic

Restrict matching only to ip/ipv6 traffic and make sure we can use the
headers, otherwise matches will be attempted on any protocol which can
be unexpected by the xt matches. Currently policy supports only ipv4/6.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent aebd17b7

net/sched/em_ipt.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -185,6 +185,19 @@ static int em_ipt_match(struct sk_buff skb, struct tcf_ematch em,
		struct nf_hook_state state;
		int ret;

		switch (tc_skb_protocol(skb)) {
		case htons(ETH_P_IP):
		if (!pskb_network_may_pull(skb, sizeof(struct iphdr)))
		return 0;
		break;
		case htons(ETH_P_IPV6):
		if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr)))
		return 0;
		break;
		default:
		return 0;
		}

		rcu_read_lock();

		if (skb->skb_iif)