This is a note to let you know that I've just added the patch titled
USB: pl2303: fix device initialisation at open
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-pl2303-fix-device-initialisation-at-open.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2d8f4447b58bba5f8cb895c07690434c02307eaf Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Mon, 10 Jun 2013 18:29:38 +0200
Subject: USB: pl2303: fix device initialisation at open
From: Johan Hovold <jhovold@xxxxxxxxx>
commit 2d8f4447b58bba5f8cb895c07690434c02307eaf upstream.
Do not use uninitialised termios data to determine when to configure the
device at open.
This also prevents stack data from leaking to userspace in the OOM error
path.
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/pl2303.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -283,7 +283,7 @@ static void pl2303_set_termios(struct tt
serial settings even to the same values as before. Thus
we actually need to filter in this specific case */
- if (!tty_termios_hw_change(&tty->termios, old_termios))
+ if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
return;
cflag = tty->termios.c_cflag;
@@ -292,7 +292,8 @@ static void pl2303_set_termios(struct tt
if (!buf) {
dev_err(&port->dev, "%s - out of memory.\n", __func__);
/* Report back no change occurred */
- tty->termios = *old_termios;
+ if (old_termios)
+ tty->termios = *old_termios;
return;
}
@@ -432,7 +433,7 @@ static void pl2303_set_termios(struct tt
control = priv->line_control;
if ((cflag & CBAUD) == B0)
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
- else if ((old_termios->c_cflag & CBAUD) == B0)
+ else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
if (control != priv->line_control) {
control = priv->line_control;
@@ -491,7 +492,6 @@ static void pl2303_close(struct usb_seri
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
{
- struct ktermios tmp_termios;
struct usb_serial *serial = port->serial;
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
int result;
@@ -507,7 +507,7 @@ static int pl2303_open(struct tty_struct
/* Setup termios */
if (tty)
- pl2303_set_termios(tty, port, &tmp_termios);
+ pl2303_set_termios(tty, port, NULL);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result) {
Patches currently in stable-queue which might be from jhovold@xxxxxxxxx are
queue-3.9/usb-pl2303-fix-device-initialisation-at-open.patch
queue-3.9/usb-f81232-fix-device-initialisation-at-open.patch
queue-3.9/usb-spcp8x5-fix-device-initialisation-at-open.patch
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