Patch "USB: serial: quatech2: fix use-after-free in probe error path" has been added to the 4.6-stable tree

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

USB: serial: quatech2: fix use-after-free in probe error path

to the 4.6-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-quatech2-fix-use-after-free-in-probe-error-path.patch
and it can be found in the queue-4.6 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: Sun, 8 May 2016 20:08:02 +0200
Subject: USB: serial: quatech2: fix use-after-free in probe error path

From: Johan Hovold <[email protected]>

commit 028c49f5e02a257c94129cd815f7c8485f51d4ef upstream.

The interface read URB is submitted in attach, but was only unlinked by the driver at disconnect.

In case of a late probe error (e.g. due to failed minor allocation), disconnect is never called and we would end up with active URBs for an unbound interface. This in turn could lead to deallocated memory being dereferenced in the completion callback.

---
 drivers/usb/serial/quatech2.c |    1 +
 1 file changed, 1 insertion(+)

@@ -141,6 +141,7 @@ static void qt2_release(struct usb_seria
 
 	serial_priv = usb_get_serial_data(serial);
 
+	usb_kill_urb(serial_priv->read_urb);
 	usb_free_urb(serial_priv->read_urb);
 	kfree(serial_priv->read_buffer);
 	kfree(serial_priv);

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

queue-4.6/usb-serial-quatech2-fix-use-after-free-in-probe-error-path.patch queue-4.6/usb-serial-option-add-support-for-cinterion-ph8-and-ahxx.patch queue-4.6/usb-serial-io_edgeport-fix-memory-leaks-in-attach-error-path.patch queue-4.6/usb-serial-mxuport-fix-use-after-free-in-probe-error-path.patch queue-4.6/usb-serial-option-add-even-more-zte-device-ids.patch queue-4.6/usb-serial-keyspan-fix-use-after-free-in-probe-error-path.patch queue-4.6/usb-serial-cp210x-fix-hardware-flow-control-disable.patch queue-4.6/usb-serial-option-add-more-zte-device-ids.patch queue-4.6/usb-serial-io_edgeport-fix-memory-leaks-in-probe-error-path.patch