Commit bb54e589 authored Feb 23, 2015 by Mahesh Bandewar Committed by David S. Miller Feb 24, 2015

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 <maheshb@google.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2a12d6cf

drivers/net/bonding/bond_3ad.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;