From 22ad42033b7d2b3d7928fba9f89d1c7f8a3c9581 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Wed, 9 May 2007 09:15:40 +0200 Subject: [PATCH] [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 Signed-off-by: Marcel Holtmann --- drivers/bluetooth/hci_ldisc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 75c15085f8..e8ae0d7e77 100644 --- 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); -- 2.39.5