ipv4: Remove erroneous check in igmpv3_newpack() and igmp_send_report().

Output route resolution never returns a route with rt_src set to zero
(which is INADDR_ANY).

Even if the flow key for the output route lookup specifies INADDR_ANY
for the source address, the output route resolution chooses a real
source address to use in the final route.

This test has existed forever in igmp_send_report() and David Stevens
simply copied over the erroneous test when implementing support for
IGMPv3.

Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 1fd3d9c..8ae0a57 100644 (file)
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -328,11 +328,6 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
                kfree_skb(skb);
                return NULL;
        }
-       if (rt->rt_src == 0) {
-               kfree_skb(skb);
-               ip_rt_put(rt);
-               return NULL;
-       }
 
        skb_dst_set(skb, &rt->dst);
        skb->dev = dev;
@@ -670,11 +665,6 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
        if (IS_ERR(rt))
                return -1;
 
-       if (rt->rt_src == 0) {
-               ip_rt_put(rt);
-               return -1;
-       }
-
        skb = alloc_skb(IGMP_SIZE+LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
        if (skb == NULL) {
                ip_rt_put(rt);