Kill child processes on bad Mojo messages

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 2012 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 766 matching lines @@
     if (!renderer_prefix.empty())
       cmd_line->PrependWrapper(renderer_prefix);
     AppendRendererCommandLine(cmd_line);
     cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
 
     // Spawn the child process asynchronously to avoid blocking the UI thread.
     // As long as there's no renderer prefix, we can use the zygote process
     // at this stage.
     child_process_launcher_.reset(new ChildProcessLauncher(
         new RendererSandboxedProcessLauncherDelegate(channel_.get()), cmd_line,
-        GetID(), this, child_token_));
+        GetID(), this, child_token_,
+        base::Bind(&RenderProcessHostImpl::OnMojoError,
+                   weak_factory_.GetWeakPtr(),
+                   base::ThreadTaskRunnerHandle::Get())));
 
     fast_shutdown_started_ = false;
   }
 
   if (!gpu_observer_registered_) {
     gpu_observer_registered_ = true;
     ui::GpuSwitchingManager::GetInstance()->AddObserver(this);
   }
 
   power_monitor_broadcaster_.Init();
@@ skipping 2001 matching lines @@
       continue;
 
     // Skip widgets in other processes.
     if (rvh->GetProcess()->GetID() != GetID())
       continue;
 
     rvh->OnWebkitPreferencesChanged();
   }
 }
 
+// static
+void RenderProcessHostImpl::OnMojoError(
+    base::WeakPtr<RenderProcessHostImpl> process,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    const std::string& error) {
+  if (!task_runner->BelongsToCurrentThread()) {
+    task_runner->PostTask(FROM_HERE,
+                          base::Bind(&RenderProcessHostImpl::OnMojoError,
+                                     process, task_runner, error));
+  }
+  if (!process)
+    return;
+  LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
+
+  // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
+  // enough information here so that we can determine what the bad message was.
+  base::debug::Alias(&error);
+  bad_message::ReceivedBadMessage(process.get(),
+                                  bad_message::RPH_MOJO_PROCESS_ERROR);
+}
+
 }  // namespace content