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%3Ba=su...
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