Patch "USB: serial: cyberjack: fix NULL-deref at open" 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: cyberjack: fix NULL-deref at open

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-cyberjack-fix-null-deref-at-open.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 <[email protected]> know about it.

From: Johan Hovold <[email protected]>
Date: Tue, 3 Jan 2017 16:39:40 +0100
Subject: USB: serial: cyberjack: fix NULL-deref at open

From: Johan Hovold <[email protected]>

commit 3dca01114dcecb1cf324534cd8d75fd1306a516b upstream.

Fix NULL-pointer dereference when clearing halt at open should the device lack a bulk-out endpoint.

Unable to handle kernel NULL pointer dereference at virtual address 00000030

...
PC is at cyberjack_open+0x40/0x9c [cyberjack]

---
 drivers/usb/serial/cyberjack.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

@@ -50,6 +50,7 @@
 #define CYBERJACK_PRODUCT_ID	0x0100
 
 /* Function prototypes */
+static int cyberjack_attach(struct usb_serial *serial);
 static int cyberjack_port_probe(struct usb_serial_port *port);
 static int cyberjack_port_remove(struct usb_serial_port *port);
 static int  cyberjack_open(struct tty_struct *tty,

@@ -77,6 +78,7 @@ static struct usb_serial_driver cyberjac
 	.description =		"Reiner SCT Cyberjack USB card reader",
 	.id_table =		id_table,
 	.num_ports =		1,
+	.attach =		cyberjack_attach,
 	.port_probe =		cyberjack_port_probe,
 	.port_remove =		cyberjack_port_remove,
 	.open =			cyberjack_open,

@@ -100,6 +102,14 @@ struct cyberjack_private {
 	short		wrsent;		/* Data already sent */
 };
 
+static int cyberjack_attach(struct usb_serial *serial)
+{
+	if (serial->num_bulk_out < serial->num_ports)
+		return -ENODEV;
+
+	return 0;
+}
+
 static int cyberjack_port_probe(struct usb_serial_port *port)
 {
 	struct cyberjack_private *priv;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/usb-serial-io_ti-fix-i-o-after-disconnect.patch queue-4.4/usb-serial-ti_usb_3410_5052-fix-null-deref-at-open.patch queue-4.4/usb-serial-kobil_sct-fix-null-deref-in-write.patch queue-4.4/usb-serial-spcp8x5-fix-null-deref-at-open.patch queue-4.4/usb-serial-mos7720-fix-parallel-probe.patch queue-4.4/usb-serial-cyberjack-fix-null-deref-at-open.patch queue-4.4/usb-serial-mos7720-fix-null-deref-at-open.patch queue-4.4/usb-serial-garmin_gps-fix-memory-leak-on-failed-urb-submit.patch queue-4.4/usb-serial-io_ti-fix-null-deref-at-open.patch queue-4.4/usb-serial-pl2303-fix-null-deref-at-open.patch queue-4.4/usb-serial-quatech2-fix-sleep-while-atomic-in-close.patch queue-4.4/usb-serial-iuu_phoenix-fix-null-deref-at-open.patch queue-4.4/usb-serial-oti6858-fix-null-deref-at-open.patch queue-4.4/usb-serial-io_edgeport-fix-null-deref-at-open.patch queue-4.4/usb-serial-mos7720-fix-parport-use-after-free-on-probe-errors.patch queue-4.4/usb-serial-mos7720-fix-use-after-free-on-probe-errors.patch queue-4.4/usb-serial-mos7840-fix-null-deref-at-open.patch queue-4.4/usb-serial-omninet-fix-null-derefs-at-open-and-disconnect.patch queue-4.4/usb-serial-keyspan_pda-verify-endpoints-at-probe.patch queue-4.4/usb-serial-io_ti-fix-another-null-deref-at-open.patch