From f9c06d35b23e870274e20377734b05d776f76fd2 Mon Sep 17 00:00:00 2001
From: Ludovic Rousseau <rousseau@debian.org>
Date: Fri, 19 Nov 2010 08:46:00 +0100
Subject: [PATCH] Check libusb_get_active_config_descriptor return value

Avoids a crash if libusb_get_active_config_descriptor() returns with an
error code.
---
 linux/hid-libusb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/linux/hid-libusb.c b/linux/hid-libusb.c
index 82da7ab..0fbca57 100644
--- a/linux/hid-libusb.c
+++ b/linux/hid-libusb.c
@@ -550,7 +550,8 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path)
 		int i,j,k;
 		libusb_get_device_descriptor(usb_dev, &desc);
 
-		libusb_get_active_config_descriptor(usb_dev, &conf_desc);
+		if (libusb_get_active_config_descriptor(usb_dev, &conf_desc) < 0)
+			continue;
 		for (j = 0; j < conf_desc->bNumInterfaces; j++) {
 			const struct libusb_interface *intf = &conf_desc->interface[j];
 			for (k = 0; k < intf->num_altsetting; k++) {