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Commit 9aa3c94c authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

ipv4: fix multicast losses 



Knut Tidemann found that first packet of a multicast flow was not
correctly received, and bisected the regression to commit b23dd4fe
(Make output route lookup return rtable directly.)

Special thanks to Knut, who provided a very nice bug report, including
sample programs to demonstrate the bug.

Reported-and-bisectedby: Knut Tidemann <knut.andre.tidemann@jotron.com>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eeb14972

net/ipv4/route.c

+1 −3
Original line number Diff line number Diff line
@@ -1902,9 +1902,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr, 


	hash = rt_hash(daddr, saddr, dev->ifindex, rt_genid(dev_net(dev)));

	rth = rt_intern_hash(hash, rth, skb, dev->ifindex);

	err = 0;

	if (IS_ERR(rth))

		err = PTR_ERR(rth);

	return IS_ERR(rth) ? PTR_ERR(rth) : 0;



e_nobufs:

	return -ENOBUFS;