From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Subject: [patch] hso: memsetting wrong data in hso_get_count() Date: Wed, 22 Feb 2012 10:30:25 +0300 Message-ID: <20120222073024.GA7389@elgon.mountain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Greg Kroah-Hartman , linux-usb@vger.kernel.org, netdev@vger.kernel.org, "David S. Miller" , kernel-janitors@vger.kernel.org To: Jan Dumon Return-path: Received: from acsinet15.oracle.com ([141.146.126.227]:50034 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752058Ab2BVHaj (ORCPT ); Wed, 22 Feb 2012 02:30:39 -0500 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: The intent was to clear out the icount struct here, but we accidentally clear stack memory instead. It probably will lead to a NULL dereference right away. Signed-off-by: Dan Carpenter diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 304fe78..e1324b4 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1632,7 +1632,7 @@ static int hso_get_count(struct tty_struct *tty, struct hso_serial *serial = get_serial_by_tty(tty); struct hso_tiocmget *tiocmget = serial->tiocmget; - memset(&icount, 0, sizeof(struct serial_icounter_struct)); + memset(icount, 0, sizeof(struct serial_icounter_struct)); if (!tiocmget) return -ENOENT;