Commit 21886725 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman

USB: f81232: fix device initialisation at open

Do not use uninitialised termios data to determine when to configure the
device at open.

This also prevents stack data from leaking to userspace.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 317ddd25
......@@ -165,10 +165,11 @@ static void f81232_set_termios(struct tty_struct *tty,
/* FIXME - Stubbed out for now */
/* Don't change anything if nothing has changed */
if (!tty_termios_hw_change(&tty->termios, old_termios))
if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
return;
/* Do the real work here... */
if (old_termios)
tty_termios_copy_hw(&tty->termios, old_termios);
}
......@@ -187,12 +188,11 @@ static int f81232_tiocmset(struct tty_struct *tty,
static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct ktermios tmp_termios;
int result;
/* Setup termios */
if (tty)
f81232_set_termios(tty, port, &tmp_termios);
f81232_set_termios(tty, port, NULL);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result) {
......
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