patch "USB: iowarrior: fix NULL-deref in write" added to usb-linus

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

USB: iowarrior: fix NULL-deref in write

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Johan Hovold <[email protected]>
Date: Tue, 7 Mar 2017 16:11:04 +0100
Subject: USB: iowarrior: fix NULL-deref in write

Make sure to verify that we have the required interrupt-out endpoint for IOWarrior56 devices to avoid dereferencing a NULL-pointer in write should a malicious device lack such an endpoint.

---
 drivers/usb/misc/iowarrior.c | 8 ++++++++
 1 file changed, 8 insertions(+)

index 3ad058cbe6ca..37c63cb39714 100644
@@ -798,6 +798,14 @@ static int iowarrior_probe(struct usb_interface *interface,
 		goto error;
 	}
 
+	if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56) {
+		if (!dev->int_out_endpoint) {
+			dev_err(&interface->dev, "no interrupt-out endpoint found\n");
+			retval = -ENODEV;
+			goto error;
+		}
+	}
+
 	/* we have to check the report_size often, so remember it in the endianness suitable for our machine */
 	dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint);
 	if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) &&

2.12.0