Handle a condition when the result of getting configured networks returns null

Linked with ag/2842135

BUG:65267749
Change-Id: Idebc1b76f454640a2b493db9fb4bf263c0e448f5

1 files changed, 7 insertions, 3 deletions

diff --git a/service/java/com/android/server/wifi/WifiStateMachine.java b/service/java/com/android/server/wifi/WifiStateMachine.java
index 92fcd81bd..d52880ad5 100644
--- a/service/java/com/android/server/wifi/WifiStateMachine.java
+++ b/service/java/com/android/server/wifi/WifiStateMachine.java
@@ -2015,9 +2015,13 @@ public class WifiStateMachine extends StateMachine implements WifiNative.WifiRss
 
     public List<WifiConfiguration> syncGetConfiguredNetworks(int uuid, AsyncChannel channel) {
         Message resultMsg = channel.sendMessageSynchronously(CMD_GET_CONFIGURED_NETWORKS, uuid);
-        List<WifiConfiguration> result = (List<WifiConfiguration>) resultMsg.obj;
-        resultMsg.recycle();
-        return result;
+        if (resultMsg == null) { // an error has occurred
+            return null;
+        } else {
+            List<WifiConfiguration> result = (List<WifiConfiguration>) resultMsg.obj;
+            resultMsg.recycle();
+            return result;
+        }
     }
 
     public List<WifiConfiguration> syncGetPrivilegedConfiguredNetwork(AsyncChannel channel) {