Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.5 061/238] USB: digi_acceleport: do sanity checking for the number of ports | Date | Sun, 10 Apr 2016 11:33:58 -0700 |
| |
4.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Oliver Neukum <oneukum@suse.com>
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@suse.com> [johan: fix OOB endpoint check and add error messages ] Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/serial/digi_acceleport.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
--- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1251,8 +1251,27 @@ static int digi_port_init(struct usb_ser 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)
| |