netdev - [PATCH net 1/2] bonding: do not allow rlb updates to invalid mac

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Message-Id: <20180509233211.28207-2-dbanerje@akamai.com>
Date:   Wed,  9 May 2018 19:32:10 -0400
From:   Debabrata Banerjee <dbanerje@...mai.com>
To:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Vlad Yasevich <vyasevic@...hat.com>
Cc:     Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>, dbanerje@...mai.com
Subject: [PATCH net 1/2] bonding: do not allow rlb updates to invalid mac

Make sure multicast, broadcast, and zero mac's cannot be the output of rlb
updates, which should all be directed arps. Receive load balancing will be
collapsed if any of these happen, as the switch will broadcast.

Signed-off-by: Debabrata Banerjee <dbanerje@...mai.com>
---
 drivers/net/bonding/bond_alb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 1ed9529e7bd1..3f6faa657360 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -450,7 +450,7 @@ static void rlb_update_client(struct rlb_client_info *client_info)
 {
 	int i;
 
-	if (!client_info->slave)
+	if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
 		return;
 
 	for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
-- 
2.17.0