This is a note to let you know that I've just added the patch titled
USB: serial: ssu100: fix control-message error handling
to the 4.9-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-serial-ssu100-fix-control-message-error-handling.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1eac5c244f705182d1552a53e2f74e2775ed95d6 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Thu, 12 Jan 2017 14:56:22 +0100
Subject: USB: serial: ssu100: fix control-message error handling
From: Johan Hovold <johan@xxxxxxxxxx>
commit 1eac5c244f705182d1552a53e2f74e2775ed95d6 upstream.
Make sure to detect short control-message transfers rather than continue
with zero-initialised data when retrieving modem status and during
device initialisation.
Fixes: 52af95459939 ("USB: add USB serial ssu100 driver")
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/ssu100.c | 31 ++++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -80,9 +80,17 @@ static inline int ssu100_setdevice(struc
static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- QT_SET_GET_DEVICE, 0xc0, 0, 0,
- data, 3, 300);
+ int ret;
+
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ QT_SET_GET_DEVICE, 0xc0, 0, 0,
+ data, 3, 300);
+ if (ret < 3) {
+ if (ret >= 0)
+ ret = -EIO;
+ }
+
+ return ret;
}
static inline int ssu100_getregister(struct usb_device *dev,
@@ -90,10 +98,17 @@ static inline int ssu100_getregister(str
unsigned short reg,
u8 *data)
{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- QT_SET_GET_REGISTER, 0xc0, reg,
- uart, data, sizeof(*data), 300);
+ int ret;
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ QT_SET_GET_REGISTER, 0xc0, reg,
+ uart, data, sizeof(*data), 300);
+ if (ret < sizeof(*data)) {
+ if (ret >= 0)
+ ret = -EIO;
+ }
+
+ return ret;
}
@@ -289,8 +304,10 @@ static int ssu100_open(struct tty_struct
QT_OPEN_CLOSE_CHANNEL,
QT_TRANSFER_IN, 0x01,
0, data, 2, 300);
- if (result < 0) {
+ if (result < 2) {
dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
+ if (result >= 0)
+ result = -EIO;
kfree(data);
return result;
}
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.9/usb-serial-mct_u232-fix-modem-status-error-handling.patch
queue-4.9/usb-serial-ark3116-fix-open-error-handling.patch
queue-4.9/usb-serial-io_edgeport-fix-epic-descriptor-handling.patch
queue-4.9/usb-serial-ti_usb_3410_5052-fix-control-message-error-handling.patch
queue-4.9/usb-serial-keyspan_pda-fix-receive-sanity-checks.patch
queue-4.9/usb-serial-sierra-fix-bogus-alternate-setting-assumption.patch
queue-4.9/usb-serial-ssu100-fix-control-message-error-handling.patch
queue-4.9/usb-serial-digi_acceleport-fix-incomplete-rx-sanity-check.patch
queue-4.9/usb-serial-io_edgeport-fix-descriptor-error-handling.patch
queue-4.9/usb-serial-quatech2-fix-control-message-error-handling.patch
queue-4.9/usb-serial-ftdi_sio-fix-latency-timer-error-handling.patch