From bb54e58929f3ce9fe4da719ff2f3264f14214b3a Mon Sep 17 00:00:00 2001 From: Mahesh Bandewar Date: Mon, 23 Feb 2015 17:50:10 -0800 Subject: [PATCH] bonding: Verify RX LACPDU has proper dest mac-addr The 802.1AX standard states: "The DA in LACPDUs is the Slow_Protocols_Multicast address." This patch enforces that and drops LACPDUs with destination MAC addresses other than Slow_Protocols_Multicast address Signed-off-by: Mahesh Bandewar Reviewed-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- drivers/net/bonding/bond_3ad.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c index cfc4a9c1000a..9b436696b95e 100644 --- a/drivers/net/bonding/bond_3ad.c +++ b/drivers/net/bonding/bond_3ad.c @@ -2485,6 +2485,9 @@ int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, if (skb->protocol != PKT_TYPE_LACPDU) return RX_HANDLER_ANOTHER; + if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) + return RX_HANDLER_ANOTHER; + lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); if (!lacpdu) return RX_HANDLER_ANOTHER; -- 2.34.1