Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755278Ab1DSUUH (ORCPT ); Tue, 19 Apr 2011 16:20:07 -0400 Received: from kroah.org ([198.145.64.141]:35724 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753569Ab1DSURm (ORCPT ); Tue, 19 Apr 2011 16:17:42 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Tue Apr 19 13:10:49 2011 Message-Id: <20110419201049.614535681@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Tue, 19 Apr 2011 13:09:09 -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, Steven Hardy Subject: [60/70] usb: qcserial avoid pointing to freed memory In-Reply-To: <20110419201501.GA8865@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2278 Lines: 80 2.6.38-stable review patch. If anyone has any objections, please let us know. ------------------ From: Steven Hardy commit 99ab3f9e4eaec35fd2d7159c31b71f17f7e613e3 upstream. Rework the qcprobe logic such that serial->private is not set when qcprobe exits with -ENODEV, otherwise serial->private will point to freed memory on -ENODEV Signed-off-by: Steven Hardy Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/qcserial.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) --- a/drivers/usb/serial/qcserial.c +++ b/drivers/usb/serial/qcserial.c @@ -111,7 +111,7 @@ static int qcprobe(struct usb_serial *se ifnum = intf->desc.bInterfaceNumber; dbg("This Interface = %d", ifnum); - data = serial->private = kzalloc(sizeof(struct usb_wwan_intf_private), + data = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL); if (!data) return -ENOMEM; @@ -134,8 +134,10 @@ static int qcprobe(struct usb_serial *se usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) { dbg("QDL port found"); - if (serial->interface->num_altsetting == 1) - return 0; + if (serial->interface->num_altsetting == 1) { + retval = 0; /* Success */ + break; + } retval = usb_set_interface(serial->dev, ifnum, 1); if (retval < 0) { @@ -145,7 +147,6 @@ static int qcprobe(struct usb_serial *se retval = -ENODEV; kfree(data); } - return retval; } break; @@ -177,7 +178,6 @@ static int qcprobe(struct usb_serial *se retval = -ENODEV; kfree(data); } - return retval; } else if (ifnum==3) { /* * NMEA (serial line 9600 8N1) @@ -199,9 +199,12 @@ static int qcprobe(struct usb_serial *se dev_err(&serial->dev->dev, "unknown number of interfaces: %d\n", nintf); kfree(data); - return -ENODEV; + retval = -ENODEV; } + /* Set serial->private if not returning -ENODEV */ + if (retval != -ENODEV) + usb_set_serial_data(serial, data); return retval; } -- 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/