bonding: fix NULL pointer deref in startup processing

	Fix the "are we creating a duplicate" check to not compare
the name if the name is NULL (meaning that the system should select
a name).  Bug reported by Benny Amorsen <benny+usenet@amorsen.dk>.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -4896,6 +4896,7 @@ int bond_create(char *name, struct bond_params *params, struct bonding **newbond
 	down_write(&bonding_rwsem);
 
 	/* Check to see if the bond already exists. */
+	if (name) {
 		list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 			if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
 				printk(KERN_ERR DRV_NAME
@@ -4904,6 +4905,7 @@ int bond_create(char *name, struct bond_params *params, struct bonding **newbond
 				res = -EPERM;
 				goto out_rtnl;
 			}
+	}
 
 	bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
 				ether_setup);