Patch "ipvlan: add L2 check for packets arriving via virtual devices" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    ipvlan: add L2 check for packets arriving via virtual devices

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ipvlan-add-l2-check-for-packets-arriving-via-virtual-devices.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Mar 19 09:58:12 CET 2018
From: Mahesh Bandewar <maheshb@google.com>
Date: Thu, 7 Dec 2017 15:15:43 -0800
Subject: ipvlan: add L2 check for packets arriving via virtual devices

From: Mahesh Bandewar <maheshb@google.com>


[ Upstream commit 92ff42645028fa6f9b8aa767718457b9264316b4 ]

Packets that don't have dest mac as the mac of the master device should
not be entertained by the IPvlan rx-handler. This is mostly true as the
packet path mostly takes care of that, except when the master device is
a virtual device. As demonstrated in the following case -

  ip netns add ns1
  ip link add ve1 type veth peer name ve2
  ip link add link ve2 name iv1 type ipvlan mode l2
  ip link set dev iv1 netns ns1
  ip link set ve1 up
  ip link set ve2 up
  ip -n ns1 link set iv1 up
  ip addr add 192.168.10.1/24 dev ve1
  ip -n ns1 addr 192.168.10.2/24 dev iv1
  ping -c2 192.168.10.2
  <Works!>
  ip neigh show dev ve1
  ip neigh show 192.168.10.2 lladdr <random> dev ve1
  ping -c2 192.168.10.2
  <Still works! Wrong!!>

This patch adds that missing check in the IPvlan rx-handler.

Reported-by: Amit Sikka <amit.sikka@ericsson.com>
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ipvlan/ipvlan_core.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -282,6 +282,10 @@ static int ipvlan_rcv_frame(struct ipvl_
 		if (dev_forward_skb(ipvlan->dev, skb) == NET_RX_SUCCESS)
 			success = true;
 	} else {
+		if (!ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
+					     ipvlan->phy_dev->dev_addr))
+			skb->pkt_type = PACKET_OTHERHOST;
+
 		ret = RX_HANDLER_ANOTHER;
 		success = true;
 	}


Patches currently in stable-queue which might be from maheshb@google.com are

queue-4.4/ipvlan-add-l2-check-for-packets-arriving-via-virtual-devices.patch