net: openvswitch: Check vport netdev name

Ensure that the provided netdev name is not one of its aliases to
prevent unnecessary creation and destruction of the vport by
ovs-vswitchd.
Signed-off-by: Jun Gu <jun.gu@easystack.cn>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Link: https://lore.kernel.org/r/20240419061425.132723-1-jun.gu@easystack.cnSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/openvswitch/vport-netdev.c

@@ -78,7 +78,10 @@ struct vport *ovs_netdev_link(struct vport *vport, const char *name)
 	int err;
 
 	vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
-	if (!vport->dev) {
+	/* Ensure that the device exists and that the provided
+	 * name is not one of its aliases.
+	 */
+	if (!vport->dev || strcmp(name, ovs_vport_name(vport))) {
 		err = -ENODEV;
 		goto error_free_vport;
 	}