Patch "USB: serial: console: fix use-after-free after failed setup" has been added to the 4.9-stable tree

Patch "USB: serial: console: fix use-after-free after failed setup" has been added to the 4.9-stable tree

[gregkh]

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

    USB: serial: console: fix use-after-free after failed setup

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-console-fix-use-after-free-after-failed-setup.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@vger.kernel.org> know about it.


>From 299d7572e46f98534033a9e65973f13ad1ce9047 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 4 Oct 2017 11:01:13 +0200
Subject: USB: serial: console: fix use-after-free after failed setup

From: Johan Hovold <johan@kernel.org>

commit 299d7572e46f98534033a9e65973f13ad1ce9047 upstream.

Make sure to reset the USB-console port pointer when console setup fails
in order to avoid having the struct usb_serial be prematurely freed by
the console code when the device is later disconnected.

Fixes: 73e487fdb75f ("[PATCH] USB console: fix disconnection issues")
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -186,6 +186,7 @@ static int usb_console_setup(struct cons
 	tty_kref_put(tty);
  reset_open_count:
 	port->port.count = 0;
+	info->port = NULL;
 	usb_autopm_put_interface(serial->interface);
  error_get_interface:
 	usb_serial_put(serial);


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.9/alsa-caiaq-fix-stray-urb-at-probe-error-path.patch
queue-4.9/usb-serial-option-add-support-for-tp-link-lte-module.patch
queue-4.9/usb-serial-cp210x-add-support-for-elv-tfd500.patch
queue-4.9/usb-serial-qcserial-add-dell-dw5818-dw5819.patch
queue-4.9/usb-serial-console-fix-use-after-free-after-failed-setup.patch
queue-4.9/usb-serial-ftdi_sio-add-id-for-cypress-wiced-dev-board.patch