Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933051Ab1CYX62 (ORCPT ); Fri, 25 Mar 2011 19:58:28 -0400 Received: from kroah.org ([198.145.64.141]:48941 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932457Ab1CYX6Z (ORCPT ); Fri, 25 Mar 2011 19:58:25 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Fri Mar 25 16:56:38 2011 Message-Id: <20110325235638.317645069@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Fri, 25 Mar 2011 16:55:55 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Johan Hovold Subject: [18/23] USB: cdc-acm: fix potential null-pointer dereference References: <20110325235537.660072281@clark.kroah.org> Content-Disposition: inline; filename=usb-cdc-acm-fix-potential-null-pointer-dereference.patch In-Reply-To: <20110325235654.GA24416@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 836 Lines: 31 From: Johan Hovold commit 15e5bee33ffc11d0e5c6f819a65e7881c5c407be upstream. Must check return value of tty_port_tty_get. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -534,6 +534,8 @@ static void acm_softint(struct work_stru if (!ACM_READY(acm)) return; tty = tty_port_tty_get(&acm->port); + if (!tty) + return; tty_wakeup(tty); tty_kref_put(tty); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/