[PATCH next 1/6] 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 <redacted>
---
 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;
--

2.2.0.rc0.207.ga3a616c

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