From: Timo Teräs <timo.teras@iki.fi>
Date: Mon, 16 Dec 2013 09:02:09 +0000 (+0200)
Subject: ip_gre: fix msg_name parsing for recvfrom/recvmsg
X-Git-Tag: v3.13-rc7~13^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e3da5bb8da45890b1dc413404e0f978ab71173e;p=pandora-kernel.git

ip_gre: fix msg_name parsing for recvfrom/recvmsg

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was refactored as mac_header is no longer updated to point to iphdr.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 <pshelar@nicira.com>
Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
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