DO NOT MERGE - Kill apps outright for API contract violations

...rather than relying on in-app code to perform the shutdown.

Backport of security fix.

Bug: 128649910
Bug: 140108616
Test: manual
Test: atest OsHostTests#testForegroundServiceBadNotification
Change-Id: I94d9de50bb03c33666471e3dbd9c721e9278f7cb
Merged-In: I94d9de50bb03c33666471e3dbd9c721e9278f7cb

core/java/android/app/IActivityManager.aidl

@@ -278,7 +278,8 @@ interface IActivityManager {
     boolean isImmersive(in IBinder token);
     void setImmersive(in IBinder token, boolean immersive);
     boolean isTopActivityImmersive();
-    void crashApplication(int uid, int initialPid, in String packageName, int userId, in String message);
+    void crashApplication(int uid, int initialPid, in String packageName, int userId,
+            in String message, boolean force);
     String getProviderMimeType(in Uri uri, int userId);
     IBinder newUriPermissionOwner(in String name);
     void grantUriPermissionFromOwner(in IBinder owner, int fromUid, in String targetPkg,

services/core/java/com/android/server/am/ActiveServices.java

@@ -787,6 +787,15 @@ public final class ActiveServices {
         }
     }
 
+    void killMisbehavingService(ServiceRecord r,
+            int appUid, int appPid, String localPackageName) {
+        synchronized (mAm) {
+            stopServiceLocked(r);
+            mAm.crashApplication(appUid, appPid, localPackageName, -1,
+                    "Bad notification for startForeground", true /*force*/);
+        }
+    }
+
     IBinder peekServiceLocked(Intent service, String resolvedType, String callingPackage) {
         ServiceLookupResult r = retrieveServiceLocked(service, resolvedType, callingPackage,
                 Binder.getCallingPid(), Binder.getCallingUid(),
@@ -3655,7 +3664,7 @@ public final class ActiveServices {
     void serviceForegroundCrash(ProcessRecord app, CharSequence serviceRecord) {
         mAm.crashApplication(app.uid, app.pid, app.info.packageName, app.userId,
                 "Context.startForegroundService() did not then call Service.startForeground(): "
-                    + serviceRecord);
+                    + serviceRecord, false /*force*/);
     }
 
     void scheduleServiceTimeoutLocked(ProcessRecord proc) {

services/core/java/com/android/server/am/ActivityManagerService.java

@@ -5773,7 +5773,7 @@ public class ActivityManagerService extends IActivityManager.Stub
 
     @Override
     public void crashApplication(int uid, int initialPid, String packageName, int userId,
-            String message) {
+            String message, boolean force) {
         if (checkCallingPermission(android.Manifest.permission.FORCE_STOP_PACKAGES)
                 != PackageManager.PERMISSION_GRANTED) {
             String msg = "Permission Denial: crashApplication() from pid="
@@ -5785,7 +5785,8 @@ public class ActivityManagerService extends IActivityManager.Stub
         }
 
         synchronized(this) {
-            mAppErrors.scheduleAppCrashLocked(uid, initialPid, packageName, userId, message);
+            mAppErrors.scheduleAppCrashLocked(uid, initialPid, packageName, userId,
+                    message, force);
         }
     }
 

services/core/java/com/android/server/am/ActivityManagerShellCommand.java

@@ -987,7 +987,7 @@ final class ActivityManagerShellCommand extends ShellCommand {
         } catch (NumberFormatException e) {
             packageName = arg;
         }
-        mInterface.crashApplication(-1, pid, packageName, userId, "shell-induced crash");
+        mInterface.crashApplication(-1, pid, packageName, userId, "shell-induced crash", false);
         return 0;
     }
 

services/core/java/com/android/server/am/AppErrors.java

@@ -314,20 +314,24 @@ class AppErrors {
     }
 
     void killAppAtUserRequestLocked(ProcessRecord app, Dialog fromDialog) {
-        app.crashing = false;
-        app.crashingReport = null;
-        app.notResponding = false;
-        app.notRespondingReport = null;
         if (app.anrDialog == fromDialog) {
             app.anrDialog = null;
         }
         if (app.waitDialog == fromDialog) {
             app.waitDialog = null;
         }
+        killAppImmediateLocked(app, "user-terminated", "user request after error");
+    }
+
+    private void killAppImmediateLocked(ProcessRecord app, String reason, String killReason) {
+        app.crashing = false;
+        app.crashingReport = null;
+        app.notResponding = false;
+        app.notRespondingReport = null;
         if (app.pid > 0 && app.pid != MY_PID) {
-            handleAppCrashLocked(app, "user-terminated" /*reason*/,
+            handleAppCrashLocked(app, reason,
                     null /*shortMsg*/, null /*longMsg*/, null /*stackTrace*/, null /*data*/);
-            app.kill("user request after error", true);
+            app.kill(killReason, true);
         }
     }
 
@@ -341,7 +345,7 @@ class AppErrors {
      * @param message
      */
     void scheduleAppCrashLocked(int uid, int initialPid, String packageName, int userId,
-            String message) {
+            String message, boolean force) {
         ProcessRecord proc = null;
 
         // Figure out which process to kill.  We don't trust that initialPid
@@ -374,6 +378,14 @@ class AppErrors {
         }
 
         proc.scheduleCrash(message);
+        if (force) {
+            // If the app is responsive, the scheduled crash will happen as expected
+            // and then the delayed summary kill will be a no-op.
+            final ProcessRecord p = proc;
+            mService.mHandler.postDelayed(
+                    () -> killAppImmediateLocked(p, "forced", "killed for invalid state"),
+                    5000L);
+        }
     }
 
     /**

services/core/java/com/android/server/am/ServiceRecord.java

@@ -584,6 +584,7 @@ final class ServiceRecord extends Binder implements ComponentName.WithComponentN
             final String localPackageName = packageName;
             final int localForegroundId = foregroundId;
             final Notification _foregroundNoti = foregroundNoti;
+            final ServiceRecord record = this;
             ams.mHandler.post(new Runnable() {
                 public void run() {
                     NotificationManagerInternal nm = LocalServices.getService(
@@ -682,10 +683,8 @@ final class ServiceRecord extends Binder implements ComponentName.WithComponentN
                         Slog.w(TAG, "Error showing notification for service", e);
                         // If it gave us a garbage notification, it doesn't
                         // get to be foreground.
-                        ams.setServiceForeground(name, ServiceRecord.this,
+                        ams.mServices.killMisbehavingService(record,
-                                0, null, 0);
+                                appUid, appPid, localPackageName);
-                        ams.crashApplication(appUid, appPid, localPackageName, -1,
-                                "Bad notification for startForeground: " + e);
                     }
                 }
             });

services/core/java/com/android/server/notification/NotificationManagerService.java

@@ -798,8 +798,22 @@ public class NotificationManagerService extends SystemService {
         @Override
         public void onNotificationError(int callingUid, int callingPid, String pkg, String tag, int id,
                 int uid, int initialPid, String message, int userId) {
+            final boolean fgService;
+            synchronized (mNotificationLock) {
+                NotificationRecord r = findNotificationLocked(pkg, tag, id, userId);
+                fgService = r != null && (r.getNotification().flags & FLAG_FOREGROUND_SERVICE) != 0;
+            }
             cancelNotification(callingUid, callingPid, pkg, tag, id, 0, 0, false, userId,
                     REASON_ERROR, null);
+            if (fgService) {
+                // Still crash for foreground services, preventing the not-crash behaviour abused
+                // by apps to give us a garbage notification and silently start a fg service.
+                Binder.withCleanCallingIdentity(
+                        () -> mAm.crashApplication(uid, initialPid, pkg, -1,
+                            "Bad notification(tag=" + tag + ", id=" + id + ") posted from package "
+                                + pkg + ", crashing app(uid=" + uid + ", pid=" + initialPid + "): "
+                                + message, true /* force */));
+            }
         }
 
         @Override