diff options
| author | Johan Hovold <jhovold@gmail.com> | 2013-06-10 18:29:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-10 20:00:48 +0200 |
| commit | 21886725d58e92188159731c7c1aac803dd6b9dc (patch) | |
| tree | 50f6e91ce8bb478b14da1ad0db15e93238521d5a /drivers | |
| parent | Linux 3.10-rc5 (diff) | |
| download | linux-21886725d58e92188159731c7c1aac803dd6b9dc.tar.xz linux-21886725d58e92188159731c7c1aac803dd6b9dc.zip | |
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: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/f81232.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 090b411d893f..7d8dd5aad236 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -165,11 +165,12 @@ 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... */ - tty_termios_copy_hw(&tty->termios, old_termios); + if (old_termios) + tty_termios_copy_hw(&tty->termios, old_termios); } static int f81232_tiocmget(struct tty_struct *tty) @@ -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) { |