From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:40570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726163AbeJMUuU (ORCPT ); Sat, 13 Oct 2018 16:50:20 -0400 Subject: patch "cdc-acm: fix race between reset and control messaging" added to usb-linus To: oneukum@suse.com, gregkh@linuxfoundation.org, stable@vger.kernel.org From: Date: Sat, 13 Oct 2018 15:13:04 +0200 Message-ID: <1539436384139172@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 cdc-acm: fix race between reset and control messaging to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >>From 9397940ed812b942c520e0c25ed4b2c64d57e8b9 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Thu, 4 Oct 2018 15:49:06 +0200 Subject: cdc-acm: fix race between reset and control messaging If a device splits up a control message and a reset() happens between the parts, the message is lost and already recieved parts must be dropped. Signed-off-by: Oliver Neukum Fixes: 1aba579f3cf51 ("cdc-acm: handle read pipe errors") Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index bc03b0a690b4..1833912f7f5f 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1642,6 +1642,7 @@ static int acm_pre_reset(struct usb_interface *intf) struct acm *acm = usb_get_intfdata(intf); clear_bit(EVENT_RX_STALL, &acm->flags); + acm->nb_index = 0; /* pending control transfers are lost */ return 0; } -- 2.19.1