[Bluetooth] Fix NULL pointer dereference in HCI line discipline

Normally a serial Bluetooth device is opened, TIOSETD'ed to N_HCI line discipline, HCIUARTSETPROTO'ed and finally closed. In case the device fails to HCIUARTSETPROTO, closing it produces a NULL pointer dereference. Signed-off-by: Ohad Ben-Cohen <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
kishon · May 11, 2007 · 22ad420 · 22ad420
1 parent d215874
commit 22ad420
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
@@ -307,7 +307,9 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 
 	if (hu) {
 		struct hci_dev *hdev = hu->hdev;
-		hci_uart_close(hdev);
+
+		if (hdev)
+			hci_uart_close(hdev);
 
 		if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
 			hu->proto->close(hu);