bonding: Fix extraction of ports from the packet headers

Wrong hash sends single stream to multiple output interfaces.

The offset calculation was relative to skb->head, fix it to be relative
to skb->data.

Fixes: a815bde ("net, bonding: Refactor bond_xmit_hash for use with
xdp_buff")
Reviewed-by: Jussi Maki <[email protected]>
Reviewed-by: Saeed Mahameed <[email protected]>
Reviewed-by: Gal Pressman <[email protected]>
Signed-off-by: Moshe Tal <[email protected]>
Acked-by: Jay Vosburgh <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Moshe Tal

drivers/net/bonding/bond_main.c

@@ -3874,8 +3874,8 @@ u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
 	    skb->l4_hash)
 		return skb->hash;
 
-	return __bond_xmit_hash(bond, skb, skb->head, skb->protocol,
-				skb->mac_header, skb->network_header,
+	return __bond_xmit_hash(bond, skb, skb->data, skb->protocol,
+				skb_mac_offset(skb), skb_network_offset(skb),
 				skb_headlen(skb));
 }