Patch "USB: digi_acceleport: do sanity checking for the number of ports" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

USB: digi_acceleport: do sanity checking for the number of ports

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-digi_acceleport-do-sanity-checking-for-the-number-of-ports.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Oliver Neukum <[email protected]>
Date: Thu, 31 Mar 2016 12:04:26 -0400
Subject: USB: digi_acceleport: do sanity checking for the number of ports

From: Oliver Neukum <[email protected]>

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

---
 drivers/usb/serial/digi_acceleport.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

@@ -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)

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/usb-cdc-acm-more-sanity-checking.patch queue-4.4/usb-mct_u232-add-sanity-checking-in-probe.patch queue-4.4/usb-digi_acceleport-do-sanity-checking-for-the-number-of-ports.patch queue-4.4/usb-cypress_m8-add-endpoint-sanity-check.patch queue-4.4/usb-retry-reset-if-a-device-times-out.patch queue-4.4/usb-hub-fix-a-typo-in-hub_port_init-leading-to-wrong-logic.patch queue-4.4/usb-usb_driver_claim_interface-add-sanity-checking.patch