Commit b58f45c8 authored Apr 26, 2017 by Johan Hovold Committed by Greg Kroah-Hartman Apr 28, 2017

staging: gdm724x: gdm_mux: fix use-after-free on module unload

Make sure to deregister the USB driver before releasing the tty driver
to avoid use-after-free in the USB disconnect callback where the tty
devices are deregistered.

Fixes: 61e12104 ("staging: gdm7240: adding LTE USB driver")
Cc: stable <stable@vger.kernel.org>     # 3.12
Cc: Won Kang <wkang77@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent ea82fc15

drivers/staging/gdm724x/gdm_mux.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -664,9 +664,8 @@ static int __init gdm_usb_mux_init(void)

		static void __exit gdm_usb_mux_exit(void)
		{
		unregister_lte_tty_driver();

		usb_deregister(&gdm_mux_driver);
		unregister_lte_tty_driver();
		}

		module_init(gdm_usb_mux_init);