openvswitch: Ensure flow is valid before executing ct

The ct action uses parts of the flow key, so we need to ensure that it
is valid before executing that action.

Fixes: 7f8a436eaa2c "openvswitch: Add conntrack action"
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 4cb93f92d6be..c6a39bf2c3b9 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -1102,6 +1102,12 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
                         break;
 
                 case OVS_ACTION_ATTR_CT:
+                        if (!is_flow_key_valid(key)) {
+                                err = ovs_flow_key_update(skb, key);
+                                if (err)
+                                        return err;
+                        }
+
                         err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key,
                                              nla_data(a));