netdev - Re: IPv6 multicast snooping behaviour on 2.6.39-rc2 and later

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Message-ID: <1314105027.2219.7.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Tue, 23 Aug 2011 15:10:27 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ang Way Chuang <wcang@....wide.ad.jp>
Cc:	netdev@...r.kernel.org,
	Linus Lüssing <linus.luessing@....de>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: IPv6 multicast snooping behaviour on 2.6.39-rc2 and later

Le mardi 23 août 2011 à 21:31 +0900, Ang Way Chuang a écrit :
> Sorry for the blurb. I hope I've configured thunderbird properly to
> send in plain text. Hope you received my reply. I tried your patch on
> 3.0.3 and it didn't fix the problem.


Thanks for trying !

Ok could you please try following patch then ?

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 2d85ca7..e9b32a3 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1497,7 +1497,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 	if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr)))
 		goto out;
 
-	len -= offset - skb_network_offset(skb2);
+	len -= offset;
 
 	__skb_pull(skb2, offset);
 	skb_reset_transport_header(skb2);
@@ -1520,6 +1520,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 		err = pskb_trim_rcsum(skb2, len);
 		if (err)
 			goto out;
+		icmp6h = icmp6_hdr(skb2);
 	}
 
 	switch (skb2->ip_summed) {


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