qcacld-3.0: Drop packets when vdev_id is invalid

There is a race condition when adapter is deleted after it is
validated in DP rx path and is assigned an invalid vdev id and
eventually invalid net_device.
To fix this, dropping packets if vdev id is found to be invalid
right before assignment to skb->cb.

Change-Id: I4e483363f59a22b45e18da929f749cd9807cc2fc
CRs-Fixed: 3084556

core/hdd/src/wlan_hdd_tx_rx.c

@@ -2205,6 +2205,13 @@ QDF_STATUS hdd_rx_pkt_thread_enqueue_cbk(void *adapter,
 		return hdd_adapter->rx_stack(adapter, nbuf_list);
 
 	vdev_id = hdd_adapter->vdev_id;
+
+	if (vdev_id >= WLAN_UMAC_VDEV_ID_MAX) {
+		hdd_info_rl("Vdev invalid. Dropping packets");
+		qdf_nbuf_list_free(nbuf_list);
+		return QDF_STATUS_E_NETDOWN;
+	}
+
 	head_ptr = nbuf_list;
 	while (head_ptr) {
 		qdf_nbuf_cb_update_vdev_id(head_ptr, vdev_id);