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

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

From: "Jaime Caama�o Ruiz" <jcaam...@suse.com>

[ Upstream commit 46ebe2834ba5b541f28ee72e556a3fed42c47570 ]

When there are both pop and push ethernet header actions among the
actions to be applied to a packet, an unexpected EINVAL (Invalid
argument) error is obtained. This is due to mac_proto not being reset
correctly when those actions are validated.

Reported-at:
https://mail.openvswitch.org/pipermail/ovs-discuss/2018-October/047554.html
Fixes: 91820da6ae85 ("openvswitch: add Ethernet push and pop actions")
Signed-off-by: Jaime Caamaño Ruiz <jcaam...@suse.com>
Tested-by: Greg Rose <gvrose8...@gmail.com>
Reviewed-by: Greg Rose <gvrose8...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/openvswitch/flow_netlink.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -2990,7 +2990,7 @@ static int __ovs_nla_copy_actions(struct
                         * is already present */
                        if (mac_proto != MAC_PROTO_NONE)
                                return -EINVAL;
-                       mac_proto = MAC_PROTO_NONE;
+                       mac_proto = MAC_PROTO_ETHERNET;
                        break;
 
                case OVS_ACTION_ATTR_POP_ETH:
@@ -2998,7 +2998,7 @@ static int __ovs_nla_copy_actions(struct
                                return -EINVAL;
                        if (vlan_tci & htons(VLAN_TAG_PRESENT))
                                return -EINVAL;
-                       mac_proto = MAC_PROTO_ETHERNET;
+                       mac_proto = MAC_PROTO_NONE;
                        break;
 
                case OVS_ACTION_ATTR_PUSH_NSH:


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