openvswitch: __nf_ct_l{3,4}proto_find() always return a valid pointer

If the protocol is not natively supported, this assigns generic protocol
tracker so we can always assume a valid pointer after these calls.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Joe Stringer <joe@ovn.org>

diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 9741a76c740504c677a81505a6204f10ed0d8902..9f0bc49fa96956c6360f5972411f5fdb3961b788 100644 (file)
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -439,20 +439,12 @@ ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone,
        u8 protonum;
 
        l3proto = __nf_ct_l3proto_find(l3num);
-       if (!l3proto) {
-               pr_debug("ovs_ct_find_existing: Can't get l3proto\n");
-               return NULL;
-       }
        if (l3proto->get_l4proto(skb, skb_network_offset(skb), &dataoff,
                                 &protonum) <= 0) {
                pr_debug("ovs_ct_find_existing: Can't get protonum\n");
                return NULL;
        }
        l4proto = __nf_ct_l4proto_find(l3num, protonum);
-       if (!l4proto) {
-               pr_debug("ovs_ct_find_existing: Can't get l4proto\n");
-               return NULL;
-       }
        if (!nf_ct_get_tuple(skb, skb_network_offset(skb), dataoff, l3num,
                             protonum, net, &tuple, l3proto, l4proto)) {
                pr_debug("ovs_ct_find_existing: Can't get tuple\n");