From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50806 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933789AbdERK6U (ORCPT ); Thu, 18 May 2017 06:58:20 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Won Kang , Johan Hovold Subject: [PATCH 4.9 12/80] staging: gdm724x: gdm_mux: fix use-after-free on module unload Date: Thu, 18 May 2017 12:47:54 +0200 Message-Id: <20170518104834.263650343@linuxfoundation.org> In-Reply-To: <20170518104833.667298773@linuxfoundation.org> References: <20170518104833.667298773@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit b58f45c8fc301fe83ee28cad3e64686c19e78f1c upstream. 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: 61e121047645 ("staging: gdm7240: adding LTE USB driver") Cc: Won Kang Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/staging/gdm724x/gdm_mux.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/staging/gdm724x/gdm_mux.c +++ b/drivers/staging/gdm724x/gdm_mux.c @@ -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);