USB fixes for 4.6-rc1

Here is a USB fix for the reported issue with 69bec72598 "USB: core:
 let USB device know device node" as well as some other issues that have
 been reported so far with this merge.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here is a USB fix for the reported issue with commit 69bec72598
  ("USB: core: let USB device know device node") as well as some other
  issues that have been reported so far with this merge window"

* tag 'usb-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: uas: Reduce can_queue to MAX_CMNDS
  USB: cdc-acm: more sanity checking
  USB: usb_driver_claim_interface: add sanity checking
  usb/core: usb_alloc_dev(): fix setting of ->portnum
  USB: iowarrior: fix oops with malicious USB descriptors

drivers/usb/class/cdc-acm.c

@@ -1179,6 +1179,9 @@ static int acm_probe(struct usb_interface *intf,
 	if (quirks == NO_UNION_NORMAL) {
 		data_interface = usb_ifnum_to_if(usb_dev, 1);
 		control_interface = usb_ifnum_to_if(usb_dev, 0);
+		/* we would crash */
+		if (!data_interface || !control_interface)
+			return -ENODEV;
 		goto skip_normal_probe;
 	}
 

drivers/usb/core/driver.c

@@ -502,11 +502,15 @@ static int usb_unbind_interface(struct device *dev)
 int usb_driver_claim_interface(struct usb_driver *driver,
 				struct usb_interface *iface, void *priv)
 {
-	struct device *dev = &iface->dev;
+	struct device *dev;
 	struct usb_device *udev;
 	int retval = 0;
 	int lpm_disable_error;
 
+	if (!iface)
+		return -ENODEV;
+
+	dev = &iface->dev;
 	if (dev->driver)
 		return -EBUSY;
 

drivers/usb/core/usb.c

@@ -424,6 +424,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 	struct usb_device *dev;
 	struct usb_hcd *usb_hcd = bus_to_hcd(bus);
 	unsigned root_hub = 0;
+	unsigned raw_port = port1;
 
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev)
@@ -498,11 +499,11 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 
 		if (!parent->parent) {
 			/* device under root hub's port */
-			port1 = usb_hcd_find_raw_port_number(usb_hcd,
+			raw_port = usb_hcd_find_raw_port_number(usb_hcd,
 				port1);
 		}
 		dev->dev.of_node = usb_of_get_child_node(parent->dev.of_node,
-				port1);
+				raw_port);
 
 		/* hub driver sets up TT records */
 	}

drivers/usb/misc/iowarrior.c

@@ -787,6 +787,12 @@ static int iowarrior_probe(struct usb_interface *interface,
 	iface_desc = interface->cur_altsetting;
 	dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
 
+	if (iface_desc->desc.bNumEndpoints < 1) {
+		dev_err(&interface->dev, "Invalid number of endpoints\n");
+		retval = -EINVAL;
+		goto error;
+	}
+
 	/* set up the endpoint information */
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 		endpoint = &iface_desc->endpoint[i].desc;

drivers/usb/storage/uas.c

@@ -836,7 +836,7 @@ static struct scsi_host_template uas_host_template = {
 	.slave_configure = uas_slave_configure,
 	.eh_abort_handler = uas_eh_abort_handler,
 	.eh_bus_reset_handler = uas_eh_bus_reset_handler,
-	.can_queue = 65536,	/* Is there a limit on the _host_ ? */
+	.can_queue = MAX_CMNDS,
 	.this_id = -1,
 	.sg_tablesize = SG_NONE,
 	.skip_settle_delay = 1,