linux-kernel - [PATCH 4.14 134/143] openvswitch: Fix push/pop ethernet validation

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Message-Id: <20181102182908.485904133@linuxfoundation.org>
Date:   Fri,  2 Nov 2018 19:35:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Jaime CaamaÃ±o Ruiz <jcaamano@...e.com>,
        Greg Rose <gvrose8192@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.14 134/143] openvswitch: Fix push/pop ethernet validation

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

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

From: "Jaime Caamaño Ruiz" <jcaamano@...e.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 CaamaÃ±o Ruiz <jcaamano@...e.com>
Tested-by: Greg Rose <gvrose8192@...il.com>
Reviewed-by: Greg Rose <gvrose8192@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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
@@ -2622,7 +2622,7 @@ 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:
@@ -2630,7 +2630,7 @@ 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;
 
 		default: