From: Oliver Neukum <oneukum@xxxxxxxx> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== commit 5a07975ad0a36708c6b0a5b9fea1ff811d0b0c1f upstream. The driver can be crashed with devices that expose crafted descriptors with too few endpoints. See: http://seclists.org/bugtraq/2016/Mar/61 Signed-off-by: Oliver Neukum <ONeukum@xxxxxxxx> [johan: fix OOB endpoint check and add error messages ] Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/usb/serial/digi_acceleport.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index 19b467fe0388..fd525134666b 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1253,8 +1253,27 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num) static int digi_startup(struct usb_serial *serial) { + struct device *dev = &serial->interface->dev; struct digi_serial *serial_priv; int ret; + int i; + + /* check whether the device has the expected number of endpoints */ + if (serial->num_port_pointers < serial->type->num_ports + 1) { + dev_err(dev, "OOB endpoints missing\n"); + return -ENODEV; + } + + for (i = 0; i < serial->type->num_ports + 1 ; i++) { + if (!serial->port[i]->read_urb) { + dev_err(dev, "bulk-in endpoint missing\n"); + return -ENODEV; + } + if (!serial->port[i]->write_urb) { + dev_err(dev, "bulk-out endpoint missing\n"); + return -ENODEV; + } + } serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); if (!serial_priv) -- 2.8.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html