Fix security vulnerability am: 2ae83f4f62 am: 11ab583834 am: ac2b87ac0f am: 132d0f2aef am: 3995674f24

am: c7892d9d0b

Change-Id: Ic59ba49542b907591f3e514ae0417ed82a5be7aa

1 files changed, 1 insertions, 2 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index de0f921e2b..e4c917a372 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2111,8 +2111,7 @@ void SurfaceFlinger::setTransactionState(
         if (s.client != NULL) {
             sp<IBinder> binder = IInterface::asBinder(s.client);
             if (binder != NULL) {
-                String16 desc(binder->getInterfaceDescriptor());
-                if (desc == ISurfaceComposerClient::descriptor) {
+                if (binder->queryLocalInterface(ISurfaceComposerClient::descriptor) != NULL) {
                     sp<Client> client( static_cast<Client *>(s.client.get()) );
                     transactionFlags |= setClientStateLocked(client, s.state);
                 }