Patch "uwb: i1480-dfu: fix NULL-deref at probe" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

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

    uwb: i1480-dfu: fix NULL-deref at probe

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:
     uwb-i1480-dfu-fix-null-deref-at-probe.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 <stable@vger.kernel.org> know about it.


>From 4ce362711d78a4999011add3115b8f4b0bc25e8c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Mon, 13 Mar 2017 13:47:53 +0100
Subject: uwb: i1480-dfu: fix NULL-deref at probe

From: Johan Hovold <johan@kernel.org>

commit 4ce362711d78a4999011add3115b8f4b0bc25e8c upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.

Note that the dereference happens in the cmd and wait_init_done
callbacks which are called during probe.

Fixes: 1ba47da52712 ("uwb: add the i1480 DFU driver")
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/uwb/i1480/dfu/usb.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/uwb/i1480/dfu/usb.c
+++ b/drivers/uwb/i1480/dfu/usb.c
@@ -362,6 +362,9 @@ int i1480_usb_probe(struct usb_interface
 				 result);
 	}
 
+	if (iface->cur_altsetting->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
 	result = -ENOMEM;
 	i1480_usb = kzalloc(sizeof(*i1480_usb), GFP_KERNEL);
 	if (i1480_usb == NULL) {


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.4/usb-serial-option-add-quectel-uc15-uc20-ec21-and-ec25-modems.patch
queue-4.4/input-ims-pcu-validate-number-of-endpoints-before-using-them.patch
queue-4.4/input-cm109-validate-number-of-endpoints-before-using-them.patch
queue-4.4/input-iforce-validate-number-of-endpoints-before-using-them.patch
queue-4.4/mmc-ushc-fix-null-deref-at-probe.patch
queue-4.4/input-kbtab-validate-number-of-endpoints-before-using-them.patch
queue-4.4/input-sur40-validate-number-of-endpoints-before-using-them.patch
queue-4.4/uwb-i1480-dfu-fix-null-deref-at-probe.patch
queue-4.4/input-hanwang-validate-number-of-endpoints-before-using-them.patch
queue-4.4/usb-idmouse-fix-null-deref-at-probe.patch
queue-4.4/uwb-hwa-rc-fix-null-deref-at-probe.patch
queue-4.4/usb-lvtest-fix-null-deref-at-probe.patch
queue-4.4/input-yealink-validate-number-of-endpoints-before-using-them.patch
queue-4.4/usb-serial-qcserial-add-dell-dw5811e.patch
queue-4.4/usb-uss720-fix-null-deref-at-probe.patch
queue-4.4/usb-wusbcore-fix-null-deref-at-probe.patch