Report unpermitted interface requests as bad messages

services/shell/public/cpp/lib/interface_registry.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/shell/public/cpp/interface_registry.h"
 
+#include <sstream>
+
+#include "mojo/public/cpp/bindings/message.h"
 #include "services/shell/public/cpp/connection.h"
 
 namespace shell {
 
 InterfaceRegistry::InterfaceRegistry()
     : binding_(this), allow_all_interfaces_(true), weak_factory_(this) {}
 
 InterfaceRegistry::InterfaceRegistry(
     const Identity& remote_identity,
     const CapabilityRequest& capability_request)
@@ skipping 66 matching lines @@
     pending_interface_requests_.emplace(interface_name, std::move(handle));
     return;
   }
 
   auto iter = name_to_binder_.find(interface_name);
   if (iter != name_to_binder_.end()) {
     iter->second->BindInterface(remote_identity_,
                                 interface_name,
                                 std::move(handle));
   } else if (!CanBindRequestForInterface(interface_name)) {
-    LOG(ERROR) << "Capability spec prevented service: "
-               << remote_identity_.name()
-               << " from binding interface: " << interface_name;
+    std::stringstream ss;
+    ss << "Capability spec prevented service " << remote_identity_.name()
+       << " from binding interface: " << interface_name;
+    LOG(ERROR) << ss.str();
+    mojo::ReportBadMessage(ss.str());
   } else if (!default_binder_.is_null()) {
     default_binder_.Run(interface_name, std::move(handle));
   } else {
     LOG(ERROR) << "Failed to locate a binder for interface: " << interface_name;
   }
 }
 
 bool InterfaceRegistry::SetInterfaceBinderForName(
     std::unique_ptr<InterfaceBinder> binder,
     const std::string& interface_name) {
   if (CanBindRequestForInterface(interface_name)) {
     RemoveInterface(interface_name);
     name_to_binder_[interface_name] = std::move(binder);
     return true;
   }
   return false;
 }
 
 bool InterfaceRegistry::CanBindRequestForInterface(
     const std::string& interface_name) const {
   return allow_all_interfaces_ ||
       capability_request_.interfaces.count(interface_name);
 }
 
 }  // namespace shell