From 85e963b89ad0727eca17bf0ac65a1cbf110b1bb6 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Timo=20Ter=C3=A4s?= Date: Mon, 16 Dec 2013 11:02:09 +0200 Subject: [PATCH] ip_gre: fix msg_name parsing for recvfrom/recvmsg MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ Upstream commit 0e3da5bb8da45890b1dc413404e0f978ab71173e ] ipgre_header_parse() needs to parse the tunnel's ip header and it uses mac_header to locate the iphdr. This got broken when gre tunneling was refactored as mac_header is no longer updated to point to iphdr. Introduce skb_pop_mac_header() helper to do the mac_header assignment and use it in ipgre_rcv() to fix msg_name parsing. Bug introduced in commit c54419321455 (GRE: Refactor GRE tunneling code.) Cc: Pravin B Shelar Signed-off-by: Timo Teräs Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- 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 64e4e98c878..828b2e8631e 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -335,6 +335,7 @@ static int ipgre_rcv(struct sk_buff *skb) iph->saddr, iph->daddr, tpi.key); if (tunnel) { + skb_pop_mac_header(skb); ip_tunnel_rcv(tunnel, skb, &tpi, hdr_len, log_ecn_error); return 0; } -- 2.11.0