Re: [syzbot] [can?] general protection fault in can_rx_unregister (2)

[Edward Adam Davis]

#syz test

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 7bc86b176b4d..72831b4e0776 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -519,7 +519,7 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
 	struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
 	struct can_dev_rcv_lists *dev_rcv_lists;
 
-	if (dev && dev->type != ARPHRD_CAN)
+	if (dev && (dev->type != ARPHRD_CAN || !can_get_ml_priv(dev)))
 		return;
 
 	if (dev && !net_eq(net, dev_net(dev)))