[Bridge] [RFT] bridge: checksum not updated after pull

Stephen Hemminger shemminger at vyatta.com
Tue Nov 15 18:09:14 UTC 2011

I think this is what is necessary, please test.

Subject: bridge: correct IPv6 checksum after pull

Bridge multicast snooping of ICMPv6 would incorrectly report a checksum problem
when used with Ethernet devices like sky2 that use CHECKSUM_COMPLETE.
When bytes are removed from skb, the computed checksum needs to be adjusted.

Signed-off-by: Stephen Hemminger <shemminger at vyatta.com>

--- a/net/bridge/br_multicast.c	2011-11-09 13:55:00.028012483 -0800
+++ b/net/bridge/br_multicast.c	2011-11-15 10:05:06.171314194 -0800
@@ -1501,7 +1501,9 @@ static int br_multicast_ipv6_rcv(struct
 	__skb_pull(skb2, offset);
+	skb_postpull_rcsum(skb2, skb_network_header(skb2),
+			   skb_network_header_len(skb2));
 	icmp6_type = icmp6_hdr(skb2)->icmp6_type;
 	switch (icmp6_type) {

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