[PATCH 4.11 10/28] geneve: fix incorrect setting of UDP checksum flag

From: Greg Kroah-Hartman
Date: Thu May 11 2017 - 11:59:01 EST


4.11-stable review patch. If anyone has any objections, please let me know.

------------------

From: Girish Moodalbail <girish.moodalbail@xxxxxxxxxx>


[ Upstream commit 5e0740c445e6ae4026f5e52456ff8d0be9725183 ]

Creating a geneve link with 'udpcsum' set results in a creation of link
for which UDP checksum will NOT be computed on outbound packets, as can
be seen below.

11: gen0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether c2:85:27:b6:b4:15 brd ff:ff:ff:ff:ff:ff promiscuity 0
geneve id 200 remote 192.168.13.1 dstport 6081 noudpcsum

Similarly, creating a link with 'noudpcsum' set results in a creation
of link for which UDP checksum will be computed on outbound packets.

Fixes: 9b4437a5b870 ("geneve: Unify LWT and netdev handling.")
Signed-off-by: Girish Moodalbail <girish.moodalbail@xxxxxxxxxx>
Acked-by: Pravin B Shelar <pshelar@xxxxxxx>
Acked-by: Lance Richardson <lrichard@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/geneve.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -1244,7 +1244,7 @@ static int geneve_newlink(struct net *ne
metadata = true;

if (data[IFLA_GENEVE_UDP_CSUM] &&
- !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
+ nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
info.key.tun_flags |= TUNNEL_CSUM;

if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&