Re: [syzbot] [bluetooth?] general protection fault in __timer_delete_sync

[Hillf Danton]

On Fri, 07 Feb 2025 12:16:20 -0800
> syzbot found the following issue on:
> 
> HEAD commit:    808eb958781e Add linux-next specific files for 20250206
> git tree:       linux-next
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1043a4a4580000

#syz test

--- x/drivers/bluetooth/hci_ldisc.c
+++ y/drivers/bluetooth/hci_ldisc.c
@@ -711,6 +711,7 @@ static int hci_uart_set_proto(struct hci
 
 	err = hci_uart_register_dev(hu);
 	if (err) {
+		clear_bit(HCI_UART_PROTO_READY, &hu->flags);
 		return err;
 	}
 
--