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..c9a79e087ed3 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -528,6 +528,8 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
 	spin_lock_bh(&net->can.rcvlists_lock);
 
 	dev_rcv_lists = can_dev_rcv_lists_find(net, dev);
+	if (!dev_rcv_lists)
+		goto out;
 	rcv_list = can_rcv_list_find(&can_id, &mask, dev_rcv_lists);
 
 	/* Search the receiver list for the item to delete.  This should