[NETFILTER]: Drop conntrack reference in ip_call_ra_chain()/ip_mr_input()

Drop reference before handing the packets to raw_rcv()
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ip_input.c

@@ -184,6 +184,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
 					raw_rcv(last, skb2);
 			}
 			last = sk;
+			nf_reset(skb);
 		}
 	}
 

net/ipv4/ipmr.c

@@ -1350,6 +1350,7 @@ int ip_mr_input(struct sk_buff *skb)
 			     */
 			    read_lock(&mrt_lock);
 			    if (mroute_socket) {
+				    nf_reset(skb);
 				    raw_rcv(mroute_socket, skb);
 				    read_unlock(&mrt_lock);
 				    return 0;