ipc/ipc_fuzzing_tests.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <stdio.h>
   6 #include <string>
   7 #include <sstream>
   8
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/threading/platform_thread.h"
  11 #include "ipc/ipc_test_base.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 // IPC messages for testing ----------------------------------------------------
  15
  16 #define IPC_MESSAGE_IMPL
  17 #include "ipc/ipc_message_macros.h"
  18
  19 #define IPC_MESSAGE_START TestMsgStart
  20
  21 // Generic message class that is an int followed by a wstring.
  22 IPC_MESSAGE_CONTROL2(MsgClassIS, int, std::wstring)
  23
  24 // Generic message class that is a wstring followed by an int.
  25 IPC_MESSAGE_CONTROL2(MsgClassSI, std::wstring, int)
  26
  27 // Message to create a mutex in the IPC server, using the received name.
  28 IPC_MESSAGE_CONTROL2(MsgDoMutex, std::wstring, int)
  29
  30 // Used to generate an ID for a message that should not exist.
  31 IPC_MESSAGE_CONTROL0(MsgUnhandled)
  32
  33 // -----------------------------------------------------------------------------
  34
  35 namespace {
  36
  37 TEST(IPCMessageIntegrity, ReadBeyondBufferStr) {
  38   //This was BUG 984408.
  39   uint32 v1 = kuint32max - 1;
  40   int v2 = 666;
  41   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  42   EXPECT_TRUE(m.WriteInt(v1));
  43   EXPECT_TRUE(m.WriteInt(v2));
  44
  45   PickleIterator iter(m);
  46   std::string vs;
  47   EXPECT_FALSE(m.ReadString(&iter, &vs));
  48 }
  49
  50 TEST(IPCMessageIntegrity, ReadBeyondBufferWStr) {
  51   //This was BUG 984408.
  52   uint32 v1 = kuint32max - 1;
  53   int v2 = 777;
  54   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  55   EXPECT_TRUE(m.WriteInt(v1));
  56   EXPECT_TRUE(m.WriteInt(v2));
  57
  58   PickleIterator iter(m);
  59   std::wstring vs;
  60   EXPECT_FALSE(m.ReadWString(&iter, &vs));
  61 }
  62
  63 TEST(IPCMessageIntegrity, ReadBytesBadIterator) {
  64   // This was BUG 1035467.
  65   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  66   EXPECT_TRUE(m.WriteInt(1));
  67   EXPECT_TRUE(m.WriteInt(2));
  68
  69   PickleIterator iter(m);
  70   const char* data = NULL;
  71   EXPECT_TRUE(m.ReadBytes(&iter, &data, sizeof(int)));
  72 }
  73
  74 TEST(IPCMessageIntegrity, ReadVectorNegativeSize) {
  75   // A slight variation of BUG 984408. Note that the pickling of vector<char>
  76   // has a specialized template which is not vulnerable to this bug. So here
  77   // try to hit the non-specialized case vector<P>.
  78   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  79   EXPECT_TRUE(m.WriteInt(-1));   // This is the count of elements.
  80   EXPECT_TRUE(m.WriteInt(1));
  81   EXPECT_TRUE(m.WriteInt(2));
  82   EXPECT_TRUE(m.WriteInt(3));
  83
  84   std::vector<double> vec;
  85   PickleIterator iter(m);
  86   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
  87 }
  88
  89 TEST(IPCMessageIntegrity, ReadVectorTooLarge1) {
  90   // This was BUG 1006367. This is the large but positive length case. Again
  91   // we try to hit the non-specialized case vector<P>.
  92   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
  93   EXPECT_TRUE(m.WriteInt(0x21000003));   // This is the count of elements.
  94   EXPECT_TRUE(m.WriteInt64(1));
  95   EXPECT_TRUE(m.WriteInt64(2));
  96
  97   std::vector<int64> vec;
  98   PickleIterator iter(m);
  99   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
 100 }
 101
 102 TEST(IPCMessageIntegrity, ReadVectorTooLarge2) {
 103   // This was BUG 1006367. This is the large but positive with an additional
 104   // integer overflow when computing the actual byte size. Again we try to hit
 105   // the non-specialized case vector<P>.
 106   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
 107   EXPECT_TRUE(m.WriteInt(0x71000000));   // This is the count of elements.
 108   EXPECT_TRUE(m.WriteInt64(1));
 109   EXPECT_TRUE(m.WriteInt64(2));
 110
 111   std::vector<int64> vec;
 112   PickleIterator iter(m);
 113   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
 114 }
 115
 116 class SimpleListener : public IPC::Listener {
 117  public:
 118   SimpleListener() : other_(NULL) {
 119   }
 120   void Init(IPC::Sender* s) {
 121     other_ = s;
 122   }
 123  protected:
 124   IPC::Sender* other_;
 125 };
 126
 127 enum {
 128   FUZZER_ROUTING_ID = 5
 129 };
 130
 131 // The fuzzer server class. It runs in a child process and expects
 132 // only two IPC calls; after that it exits the message loop which
 133 // terminates the child process.
 134 class FuzzerServerListener : public SimpleListener {
 135  public:
 136   FuzzerServerListener() : message_count_(2), pending_messages_(0) {
 137   }
 138   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE {
 139     if (msg.routing_id() == MSG_ROUTING_CONTROL) {
 140       ++pending_messages_;
 141       IPC_BEGIN_MESSAGE_MAP(FuzzerServerListener, msg)
 142         IPC_MESSAGE_HANDLER(MsgClassIS, OnMsgClassISMessage)
 143         IPC_MESSAGE_HANDLER(MsgClassSI, OnMsgClassSIMessage)
 144       IPC_END_MESSAGE_MAP()
 145       if (pending_messages_) {
 146         // Probably a problem de-serializing the message.
 147         ReplyMsgNotHandled(msg.type());
 148       }
 149     }
 150     return true;
 151   }
 152
 153  private:
 154   void OnMsgClassISMessage(int value, const std::wstring& text) {
 155     UseData(MsgClassIS::ID, value, text);
 156     RoundtripAckReply(FUZZER_ROUTING_ID, MsgClassIS::ID, value);
 157     Cleanup();
 158   }
 159
 160   void OnMsgClassSIMessage(const std::wstring& text, int value) {
 161     UseData(MsgClassSI::ID, value, text);
 162     RoundtripAckReply(FUZZER_ROUTING_ID, MsgClassSI::ID, value);
 163     Cleanup();
 164   }
 165
 166   bool RoundtripAckReply(int routing, uint32 type_id, int reply) {
 167     IPC::Message* message = new IPC::Message(routing, type_id,
 168                                              IPC::Message::PRIORITY_NORMAL);
 169     message->WriteInt(reply + 1);
 170     message->WriteInt(reply);
 171     return other_->Send(message);
 172   }
 173
 174   void Cleanup() {
 175     --message_count_;
 176     --pending_messages_;
 177     if (0 == message_count_)
 178       base::MessageLoop::current()->Quit();
 179   }
 180
 181   void ReplyMsgNotHandled(uint32 type_id) {
 182     RoundtripAckReply(FUZZER_ROUTING_ID, MsgUnhandled::ID, type_id);
 183     Cleanup();
 184   }
 185
 186   void UseData(int caller, int value, const std::wstring& text) {
 187     std::wostringstream wos;
 188     wos << L"IPC fuzzer:" << caller << " [" << value << L" " << text << L"]\n";
 189     std::wstring output = wos.str();
 190     LOG(WARNING) << output.c_str();
 191   };
 192
 193   int message_count_;
 194   int pending_messages_;
 195 };
 196
 197 class FuzzerClientListener : public SimpleListener {
 198  public:
 199   FuzzerClientListener() : last_msg_(NULL) {
 200   }
 201
 202   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE {
 203     last_msg_ = new IPC::Message(msg);
 204     base::MessageLoop::current()->Quit();
 205     return true;
 206   }
 207
 208   bool ExpectMessage(int value, uint32 type_id) {
 209     if (!MsgHandlerInternal(type_id))
 210       return false;
 211     int msg_value1 = 0;
 212     int msg_value2 = 0;
 213     PickleIterator iter(*last_msg_);
 214     if (!last_msg_->ReadInt(&iter, &msg_value1))
 215       return false;
 216     if (!last_msg_->ReadInt(&iter, &msg_value2))
 217       return false;
 218     if ((msg_value2 + 1) != msg_value1)
 219       return false;
 220     if (msg_value2 != value)
 221       return false;
 222
 223     delete last_msg_;
 224     last_msg_ = NULL;
 225     return true;
 226   }
 227
 228   bool ExpectMsgNotHandled(uint32 type_id) {
 229     return ExpectMessage(type_id, MsgUnhandled::ID);
 230   }
 231
 232  private:
 233   bool MsgHandlerInternal(uint32 type_id) {
 234     base::MessageLoop::current()->Run();
 235     if (NULL == last_msg_)
 236       return false;
 237     if (FUZZER_ROUTING_ID != last_msg_->routing_id())
 238       return false;
 239     return (type_id == last_msg_->type());
 240   };
 241
 242   IPC::Message* last_msg_;
 243 };
 244
 245 // Runs the fuzzing server child mode. Returns when the preset number of
 246 // messages have been received.
 247 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(FuzzServerClient) {
 248   base::MessageLoopForIO main_message_loop;
 249   FuzzerServerListener listener;
 250   IPC::Channel channel(IPCTestBase::GetChannelName("FuzzServerClient"),
 251                        IPC::Channel::MODE_CLIENT,
 252                        &listener);
 253   CHECK(channel.Connect());
 254   listener.Init(&channel);
 255   base::MessageLoop::current()->Run();
 256   return 0;
 257 }
 258
 259 class IPCFuzzingTest : public IPCTestBase {
 260 };
 261
 262 // This test makes sure that the FuzzerClientListener and FuzzerServerListener
 263 // are working properly by generating two well formed IPC calls.
 264 TEST_F(IPCFuzzingTest, SanityTest) {
 265   Init("FuzzServerClient");
 266
 267   FuzzerClientListener listener;
 268   CreateChannel(&listener);
 269   listener.Init(channel());
 270   ASSERT_TRUE(ConnectChannel());
 271   ASSERT_TRUE(StartClient());
 272
 273   IPC::Message* msg = NULL;
 274   int value = 43;
 275   msg = new MsgClassIS(value, L"expect 43");
 276   sender()->Send(msg);
 277   EXPECT_TRUE(listener.ExpectMessage(value, MsgClassIS::ID));
 278
 279   msg = new MsgClassSI(L"expect 44", ++value);
 280   sender()->Send(msg);
 281   EXPECT_TRUE(listener.ExpectMessage(value, MsgClassSI::ID));
 282
 283   EXPECT_TRUE(WaitForClientShutdown());
 284   DestroyChannel();
 285 }
 286
 287 // This test uses a payload that is smaller than expected. This generates an
 288 // error while unpacking the IPC buffer which in debug trigger an assertion and
 289 // in release is ignored (!). Right after we generate another valid IPC to make
 290 // sure framing is working properly.
 291 #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
 292 TEST_F(IPCFuzzingTest, MsgBadPayloadShort) {
 293   Init("FuzzServerClient");
 294
 295   FuzzerClientListener listener;
 296   CreateChannel(&listener);
 297   listener.Init(channel());
 298   ASSERT_TRUE(ConnectChannel());
 299   ASSERT_TRUE(StartClient());
 300
 301   IPC::Message* msg = new IPC::Message(MSG_ROUTING_CONTROL, MsgClassIS::ID,
 302                                        IPC::Message::PRIORITY_NORMAL);
 303   msg->WriteInt(666);
 304   sender()->Send(msg);
 305   EXPECT_TRUE(listener.ExpectMsgNotHandled(MsgClassIS::ID));
 306
 307   msg = new MsgClassSI(L"expect one", 1);
 308   sender()->Send(msg);
 309   EXPECT_TRUE(listener.ExpectMessage(1, MsgClassSI::ID));
 310
 311   EXPECT_TRUE(WaitForClientShutdown());
 312   DestroyChannel();
 313 }
 314 #endif
 315
 316 // This test uses a payload that has too many arguments, but so the payload size
 317 // is big enough so the unpacking routine does not generate an error as in the
 318 // case of MsgBadPayloadShort test. This test does not pinpoint a flaw (per se)
 319 // as by design we don't carry type information on the IPC message.
 320 TEST_F(IPCFuzzingTest, MsgBadPayloadArgs) {
 321   Init("FuzzServerClient");
 322
 323   FuzzerClientListener listener;
 324   CreateChannel(&listener);
 325   listener.Init(channel());
 326   ASSERT_TRUE(ConnectChannel());
 327   ASSERT_TRUE(StartClient());
 328
 329   IPC::Message* msg = new IPC::Message(MSG_ROUTING_CONTROL, MsgClassSI::ID,
 330                                        IPC::Message::PRIORITY_NORMAL);
 331   msg->WriteWString(L"d");
 332   msg->WriteInt(0);
 333   msg->WriteInt(0x65);  // Extra argument.
 334
 335   sender()->Send(msg);
 336   EXPECT_TRUE(listener.ExpectMessage(0, MsgClassSI::ID));
 337
 338   // Now send a well formed message to make sure the receiver wasn't
 339   // thrown out of sync by the extra argument.
 340   msg = new MsgClassIS(3, L"expect three");
 341   sender()->Send(msg);
 342   EXPECT_TRUE(listener.ExpectMessage(3, MsgClassIS::ID));
 343
 344   EXPECT_TRUE(WaitForClientShutdown());
 345   DestroyChannel();
 346 }
 347
 348 }  // namespace