Some hardening of isolated processes by restricting access to services.

Services now must explicitly opt in to being accessed by isolated
processes.  Currently only the activity manager and surface flinger
allow this.  Activity manager is needed so that we can actually
bring up the process; SurfaceFlinger is needed to be able to get the
display information for creating the Configuration.  The SurfaceFlinger
should be safe because the app doesn't have access to the window
manager so can't actually get a surface to do anything with.

The activity manager now protects most of its entry points against
isolated processes.

Change-Id: I0dad8cb2c873575c4c7659c3c2a7eda8e98f46b0

2 files changed, 6 insertions, 5 deletions

diff --git a/include/binder/BinderService.h b/include/binder/BinderService.h
index 2316fef..ca594d3 100644
--- a/include/binder/BinderService.h
+++ b/include/binder/BinderService.h
@@ -34,15 +34,15 @@ template<typename SERVICE>
 class BinderService
 {
 public:
-    static status_t publish() {
+    static status_t publish(bool allowIsolated = false) {
         sp<IServiceManager> sm(defaultServiceManager());
-        return sm->addService(String16(SERVICE::getServiceName()), new SERVICE());
+        return sm->addService(String16(SERVICE::getServiceName()), new SERVICE(), allowIsolated);
     }
 
-    static void publishAndJoinThreadPool() {
+    static void publishAndJoinThreadPool(bool allowIsolated = false) {
         sp<ProcessState> proc(ProcessState::self());
         sp<IServiceManager> sm(defaultServiceManager());
-        sm->addService(String16(SERVICE::getServiceName()), new SERVICE());
+        sm->addService(String16(SERVICE::getServiceName()), new SERVICE(), allowIsolated);
         ProcessState::self()->startThreadPool();
         IPCThreadState::self()->joinThreadPool();
     }
diff --git a/include/binder/IServiceManager.h b/include/binder/IServiceManager.h
index 24e9e99..2c297d6 100644
--- a/include/binder/IServiceManager.h
+++ b/include/binder/IServiceManager.h
@@ -47,7 +47,8 @@ public:
      * Register a service.
      */
     virtual status_t            addService( const String16& name,
-                                            const sp<IBinder>& service) = 0;
+                                            const sp<IBinder>& service,
+                                            bool allowIsolated = false) = 0;
 
     /**
      * Return list of all existing services.