diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
index aefcded8e12a..b6be8c19e537 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
@@ -534,12 +534,18 @@ static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
 				      struct pcan_usb_pro_rxmsg *rx)
 {
 	const unsigned int ctrl_idx = (rx->len >> 4) & 0x0f;
-	struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
-	struct net_device *netdev = dev->netdev;
+	struct peak_usb_device *dev;
+	struct net_device *netdev;
 	struct can_frame *can_frame;
 	struct sk_buff *skb;
 	struct skb_shared_hwtstamps *hwts;
 
+	if (ctrl_idx >= ARRAY_SIZE(usb_if->dev))
+		return -EINVAL;
+
+	dev = usb_if->dev[ctrl_idx];
+	netdev = dev->netdev;
+
 	skb = alloc_can_skb(netdev, &can_frame);
 	if (!skb)
 		return -ENOMEM;
@@ -573,14 +579,20 @@ static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if,
 {
 	const u16 raw_status = le16_to_cpu(er->status);
 	const unsigned int ctrl_idx = (er->channel >> 4) & 0x0f;
-	struct peak_usb_device *dev = usb_if->dev[ctrl_idx];
-	struct net_device *netdev = dev->netdev;
+	struct peak_usb_device *dev;
+	struct net_device *netdev;
 	struct can_frame *can_frame;
 	enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 	u8 err_mask = 0;
 	struct sk_buff *skb;
 	struct skb_shared_hwtstamps *hwts;
 
+	if (ctrl_idx >= ARRAY_SIZE(usb_if->dev))
+		return -EINVAL;
+
+	dev = usb_if->dev[ctrl_idx];
+	netdev = dev->netdev;
+
 	/* nothing should be sent while in BUS_OFF state */
 	if (dev->can.state == CAN_STATE_BUS_OFF)
 		return 0;