[mojo-edk] Initialize message buffers after alloc

mojo/edk/system/channel.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 "mojo/edk/system/channel.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 18 matching lines @@
 
 Channel::Message::Message(size_t payload_size, size_t num_handles) {
   size_ = payload_size + sizeof(Header);
 #if defined(OS_WIN)
   // On Windows we serialize platform handles directly into the message buffer.
   size_ += num_handles * sizeof(PlatformHandle);
 #endif
 
   data_ = static_cast<char*>(base::AlignedAlloc(size_,
                                                 kChannelMessageAlignment));
+  memset(data_, 0, size_);
   header_ = reinterpret_cast<Header*>(data_);
 
   DCHECK_LE(size_, std::numeric_limits<uint32_t>::max());
   header_->num_bytes = static_cast<uint32_t>(size_);
 
   DCHECK_LE(num_handles, std::numeric_limits<uint16_t>::max());
   header_->num_handles = static_cast<uint16_t>(num_handles);
 
   header_->padding = 0;
 
@@ skipping 281 matching lines @@
   return true;
 }
 
 void Channel::OnError() {
   if (delegate_)
     delegate_->OnChannelError();
 }
 
 }  // namespace edk
 }  // namespace mojo