From 59750213e765ffa8c711b2ccad5a81ae56baee5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Thu, 22 May 2014 18:34:23 +0200
Subject: [PATCH] usb: fixed potential crash.

* The active interface may be null. This actually happens with a Lasmex
  USB speaker in case it is turned on.
---
 src/add-ons/kernel/bus_managers/usb/Device.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/add-ons/kernel/bus_managers/usb/Device.cpp b/src/add-ons/kernel/bus_managers/usb/Device.cpp
index b8de0d771d..f15b52216d 100644
--- a/src/add-ons/kernel/bus_managers/usb/Device.cpp
+++ b/src/add-ons/kernel/bus_managers/usb/Device.cpp
@@ -465,6 +465,9 @@ Device::InitEndpoints(int32 interfaceIndex)
 
 		usb_interface_info* interfaceInfo
 			= fCurrentConfiguration->interface[j].active;
+		if (interfaceInfo == NULL)
+			continue;
+
 		for (size_t i = 0; i < interfaceInfo->endpoint_count; i++) {
 			usb_endpoint_info* endpoint = &interfaceInfo->endpoint[i];
 			Pipe* pipe = NULL;