diff options
| author | Oliver Neukum <oneukum@suse.com> | 2016-03-31 12:04:26 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-12 09:08:41 -0700 |
| commit | 4f6ad5b0d28c84030693fe21b308c0b711fa66f6 (patch) | |
| tree | f538016a70c391e3086543f56727bf4a0ebd8bed /drivers/usb/serial/digi_acceleport.c | |
| parent | 9deac9454b7a5643a09829f4731276cea6697b72 (diff) | |
USB: digi_acceleport: do sanity checking for the number of ports
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>
Diffstat (limited to 'drivers/usb/serial/digi_acceleport.c')
| -rw-r--r-- | drivers/usb/serial/digi_acceleport.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index 12b0e67473ba..3df7b7ec178e 100644 --- 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_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) |