From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:52428 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808AbcKIK1d (ORCPT ); Wed, 9 Nov 2016 05:27:33 -0500 Subject: Patch "usb: chipidea: host: fix NULL ptr dereference during shutdown" has been added to the 4.8-stable tree To: stefan.wahren@i2se.com, gregkh@linuxfoundation.org, peter.chen@nxp.com, stern@rowland.harvard.edu Cc: , From: Date: Wed, 09 Nov 2016 11:27:16 +0100 Message-ID: <1478687236241139@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled usb: chipidea: host: fix NULL ptr dereference during shutdown to the 4.8-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-chipidea-host-fix-null-ptr-dereference-during-shutdown.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 991d5add50a5bb6ab8f12f2129f5c7487f6baaf6 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Sat, 10 Sep 2016 12:53:21 +0000 Subject: usb: chipidea: host: fix NULL ptr dereference during shutdown From: Stefan Wahren commit 991d5add50a5bb6ab8f12f2129f5c7487f6baaf6 upstream. After commit b09b5224fe86 ("usb: chipidea: implement platform shutdown callback") and commit 43a404577a93 ("usb: chipidea: host: set host to be null after hcd is freed") a NULL pointer dereference is caused on i.MX23 during shutdown. So ensure that role is set to CI_ROLE_END and we finish interrupt handling before the hcd is deallocated. This avoids the NULL pointer dereference. Suggested-by: Alan Stern Signed-off-by: Stefan Wahren Fixes: b09b5224fe86 ("usb: chipidea: implement platform shutdown callback") Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/host.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -185,6 +185,8 @@ static void host_stop(struct ci_hdrc *ci if (hcd) { usb_remove_hcd(hcd); + ci->role = CI_ROLE_END; + synchronize_irq(ci->irq); usb_put_hcd(hcd); if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) && (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON)) Patches currently in stable-queue which might be from stefan.wahren@i2se.com are queue-4.8/usb-chipidea-host-fix-null-ptr-dereference-during-shutdown.patch