Patch "USB: serial: visor: fix crash on detecting device without write_urbs" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

    USB: serial: visor: fix crash on detecting device without write_urbs

to the 4.4-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-visor-fix-crash-on-detecting-device-without-write_urbs.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.

From cb3232138e37129e88240a98a1d2aba2187ff57c Mon Sep 17 00:00:00 2001

From: Vladis Dronov <redacted>
Date: Tue, 12 Jan 2016 15:10:50 +0100
Subject: USB: serial: visor: fix crash on detecting device without write_urbs

From: Vladis Dronov <redacted>

commit cb3232138e37129e88240a98a1d2aba2187ff57c upstream.

The visor driver crashes in clie_5_attach() when a specially crafted USB
device without bulk-out endpoint is detected. This fix adds a check that
the device has proper configuration expected by the driver.

Reported-by: Ralf Spenneberg <redacted>
Signed-off-by: Vladis Dronov <redacted>
Fixes: cfb8da8f69b8 ("USB: visor: fix initialisation of UX50/TH55 devices")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/serial/visor.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c

@@ -597,8 +597,10 @@ static int clie_5_attach(struct usb_seri
 	 */
 
 	/* some sanity check */
-	if (serial->num_ports < 2)
-		return -1;
+	if (serial->num_bulk_out < 2) {
+		dev_err(&serial->interface->dev, "missing bulk out endpoints\n");
+		return -ENODEV;
+	}
 
 	/* port 0 now uses the modified endpoint Address */
 	port = serial->port[0];

Patches currently in stable-queue which might be from vdronov@redhat.com are

queue-4.4/usb-serial-visor-fix-crash-on-detecting-device-without-write_urbs.patch