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Commit 420cc350 authored by Marcel Holtmann's avatar Marcel Holtmann Committed by David S. Miller
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[Bluetooth] Avoid NULL pointer dereference with tty->driver 



This patch checks for tty->driver before trying to call flush_buffer().

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 25ea6db0

drivers/bluetooth/hci_ldisc.c

+2 −2
Original line number Diff line number Diff line
@@ -191,7 +191,7 @@ static int hci_uart_flush(struct hci_dev *hdev) 


	/* Flush any pending characters in the driver and discipline. */

	tty_ldisc_flush(tty);

	if (tty->driver->flush_buffer)

	if (tty->driver && tty->driver->flush_buffer)

		tty->driver->flush_buffer(tty);



	if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
@@ -290,7 +290,7 @@ static int hci_uart_tty_open(struct tty_struct *tty) 
	if (tty->ldisc.flush_buffer)

		tty->ldisc.flush_buffer(tty);



	if (tty->driver->flush_buffer)

	if (tty->driver && tty->driver->flush_buffer)

		tty->driver->flush_buffer(tty);



	return 0;