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Date: Thu, 12 Dec 2013 10:53:52 +0200
From: Timo Teräs <timo.teras@....fi>
To: netdev@...r.kernel.org
Cc: Timo Teräs <timo.teras@....fi>,
Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net] ip_gre: fix msg_name parsing for recvfrom/recvmsg
ipgre_header_parse() needs to parse the tunnel's ip header for getting
the link-layer addresses, and uses mac_header to get the header. This
fixes setting mac_header on the receive path to original behaviour.
Bug added in commit c54419321455 (GRE: Refactor GRE tunneling code.)
Cc: Pravin B Shelar <pshelar@...ira.com>
Signed-off-by: Timo Teräs <timo.teras@....fi>
---
Alternate would be to do skb_reset_inner_headers() in ip_tunnel_rcv() and
update ipgre_header_parse() to use skb_inner_network_header(). Though, then
inner would then be referring to the "outer" headers.
If applied as-is, should go to -stable too.
net/ipv4/ip_gre.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index d7aea4c..cc2c7f1 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -217,6 +217,7 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
iph->saddr, iph->daddr, tpi->key);
if (tunnel) {
+ skb->mac_header = skb->network_header;
ip_tunnel_rcv(tunnel, skb, tpi, log_ecn_error);
return PACKET_RCVD;
}
--
1.8.5.1
--
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