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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>
This commit is contained in:
Mahesh Bandewar 2015-02-23 17:50:10 -08:00 committed by David S. Miller
parent 2a12d6cf75
commit bb54e58929
1 changed files with 3 additions and 0 deletions
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3
drivers/net/bonding/bond_3ad.c
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@ -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;