VPN: fix crash on missing CCM

Bug: 350408964
Test: atest CtsNetTestCases:android.net.cts.Ikev2VpnTest#testStartProvisionedVpnV4ProfileSession
Flag: EXEMPT bugfix
Change-Id: I2f08fb2fba667afa34f9951ff193bcb9d12683a6

1 files changed, 16 insertions, 4 deletions

diff --git a/services/core/java/com/android/server/connectivity/Vpn.java b/services/core/java/com/android/server/connectivity/Vpn.java
index 5905b7de5b6e..e1bb8a1a0f21 100644
--- a/services/core/java/com/android/server/connectivity/Vpn.java
+++ b/services/core/java/com/android/server/connectivity/Vpn.java
@@ -344,7 +344,11 @@ public class Vpn {
     private final AppOpsManager mAppOpsManager;
     private final ConnectivityDiagnosticsManager mConnectivityDiagnosticsManager;
     private final TelephonyManager mTelephonyManager;
+
+    // null if FEATURE_TELEPHONY_SUBSCRIPTION is not declared
+    @Nullable
     private final CarrierConfigManager mCarrierConfigManager;
+
     private final SubscriptionManager mSubscriptionManager;
 
     // The context is for specific user which is created from mUserId
@@ -2837,8 +2841,10 @@ public class Vpn {
                     createUserAndRestrictedProfilesRanges(mUserId,
                             mConfig.allowedApplications, mConfig.disallowedApplications));
 
-            mCarrierConfigManager.registerCarrierConfigChangeListener(mExecutor,
-                    mCarrierConfigChangeListener);
+            if (mCarrierConfigManager != null) {
+                mCarrierConfigManager.registerCarrierConfigChangeListener(mExecutor,
+                        mCarrierConfigChangeListener);
+            }
         }
 
         @Override
@@ -3343,6 +3349,10 @@ public class Vpn {
          */
         @Nullable
         private CarrierConfigInfo getCarrierConfigForUnderlyingNetwork() {
+            if (mCarrierConfigManager == null) {
+                return null;
+            }
+
             final int subId = getCellSubIdForNetworkCapabilities(mUnderlyingNetworkCapabilities);
             if (subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
                 Log.d(TAG, "Underlying network is not a cellular network");
@@ -3962,8 +3972,10 @@ public class Vpn {
 
             resetIkeState();
 
-            mCarrierConfigManager.unregisterCarrierConfigChangeListener(
-                    mCarrierConfigChangeListener);
+            if (mCarrierConfigManager != null) {
+                mCarrierConfigManager.unregisterCarrierConfigChangeListener(
+                        mCarrierConfigChangeListener);
+            }
             mConnectivityManager.unregisterNetworkCallback(mNetworkCallback);
 
             mExecutor.shutdown();