From 09687064f4cf681d2aa299c393e32f22fc013c96 Mon Sep 17 00:00:00 2001
From: Svet Ganov <svetoslavganov@google.com>
Date: Thu, 11 Dec 2014 22:59:08 -0800
Subject: [PATCH] Fix a NPE in AccessiiblityManagerService.

It is possible that the accessibility windows list is null which
is treated as if there is no window information. The getWindows
method was accessing properties of the windows filed witgout a
null check.

bug:18522998

Change-Id: Ieefe678d3da3d6e8f96c0e4bedac0c55975621fa
---
 .../server/accessibility/AccessibilityManagerService.java      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index 89aebe8dd7957..698d474907782 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -2145,6 +2145,9 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub {
                 if (!permissionGranted) {
                     return null;
                 }
+                if (mSecurityPolicy.mWindows == null) {
+                    return null;
+                }
                 List<AccessibilityWindowInfo> windows = new ArrayList<>();
                 final int windowCount = mSecurityPolicy.mWindows.size();
                 for (int i = 0; i < windowCount; i++) {