ipv4: use dst with ref during bcast/mcast loopback
Julian Anastasov [Sun, 7 Aug 2011 10:17:22 +0000 (10:17 +0000)]
Make sure skb dst has reference when moving to
another context. Currently, I don't see protocols that can
hit it when sending broadcasts/multicasts to loopback using
noref dsts, so it is just a precaution.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ip_output.c

index 77d3ede..8c65633 100644 (file)
@@ -122,6 +122,7 @@ static int ip_dev_loopback_xmit(struct sk_buff *newskb)
        newskb->pkt_type = PACKET_LOOPBACK;
        newskb->ip_summed = CHECKSUM_UNNECESSARY;
        WARN_ON(!skb_dst(newskb));
+       skb_dst_force(newskb);
        netif_rx_ni(newskb);
        return 0;
 }