chrome_frame/buggy_bho_handling.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 "chrome_frame/buggy_bho_handling.h"
   6
   7 #include "base/logging.h"
   8 #include "base/process_util.h"
   9 #include "base/win/scoped_comptr.h"
  10
  11 #include "chrome_frame/exception_barrier.h"
  12 #include "chrome_frame/function_stub.h"
  13 #include "chrome_frame/utils.h"
  14 #include "chrome_frame/vtable_patch_manager.h"
  15
  16 namespace buggy_bho {
  17
  18 base::ThreadLocalPointer<BuggyBhoTls> BuggyBhoTls::s_bad_object_tls_;
  19
  20 struct ModuleAndVersion {
  21   const char* module_name_;
  22   const uint32 major_version_;
  23   const uint32 minor_version_;
  24 };
  25
  26 const ModuleAndVersion kBuggyModules[] = {
  27   { "askbar.dll", 4, 1 },  // troublemaker: 4.1.0.5.
  28   { "gbieh.dll", 3, 8 },  // troublemaker: 3.8.14.12
  29   { "gbiehcef.dll", 3, 8 },  // troublemaker: 3.8.11.23
  30   { "alot.dll", 2, 5 },  // troublemaker: 2.5.12000.509
  31   { "ctbr.dll", 5, 1 },  // troublemaker: 5.1.0.95
  32   { "srchbxex.dll", 1, 2 },  // troublemaker: 1.2.123.0
  33   { "iedvtool32.dll", 8, 0 },  // troublemaker: 8.0.0.4
  34   { "mst164.dll", 9, 1 },  // troublemaker: 9.1.3700.1
  35   { "deposit_ie_com.dll", 0, 1  },  // troublemaker: 0.1.0.72
  36   { "rpshell32.dll", 6, 0 },  // troublemaker: 6.0.6000.1389
  37   { "msgsres.dll", 6, 0 },  // troublemaker: 6.0.6000.1389
  38   { "limewireinttb.dll", 4, 1  },  // troublemaker: 4.1.1.1000
  39   { "pxsecure.dll", 3, 0  },  // troublemaker: 3.0.5.220
  40
  41   // These BHOs seem to be out of the same buggy BHO factory
  42   { "tbabso.dll", 4, 5 },  // troublemaker: 4.5.156.0
  43   { "tbabs0.dll.dll", 4, 5 },  // troublemaker: 4.5.156.0
  44   { "tbbes0.dll", 4, 5 },  // troublemaker: 4.5.153.0
  45   { "tbfre0.dll", 4, 5 },  // troublemaker: 4.5.181.1
  46   { "tbmypl.dll", 4, 5 },  // troublemaker: 4.5.181.3
  47   { "tbmul1.dll", 4, 5 },  // troublemaker: 4.5.181.1
  48   { "tbdow1.dll", 4, 5 },  // troublemaker: 4.5.167.0
  49   { "tbfree.dll", 4, 5 },  // troublemaker: 4.5.178.0
  50
  51   // Viruses?
  52   { "msgsc2.dll", 0xffff, 0xffff },  // troublemaker: 1.2.3000.1
  53   { "essclis.dll", 0xffff, 0xffff },  // troublemaker: 4.3.1800.2
  54   { "snagwb.dll", 0xffff, 0xffff },  // troublemaker: 2.6.0.28
  55 };
  56
  57 bool IsBuggyBho(HMODULE mod) {
  58   DCHECK(mod);
  59
  60   char path[MAX_PATH * 2] = {0};
  61   ::GetModuleFileNameA(mod, path, arraysize(path));
  62   const char* file_name = ::PathFindFileNameA(path);
  63   for (size_t i = 0; i < arraysize(kBuggyModules); ++i) {
  64     if (lstrcmpiA(file_name, kBuggyModules[i].module_name_) == 0) {
  65       uint32 version = 0;
  66       GetModuleVersion(mod, &version, NULL);
  67       const ModuleAndVersion& buggy = kBuggyModules[i];
  68       if (HIWORD(version) < buggy.major_version_ ||
  69           (HIWORD(version) == buggy.major_version_ &&
  70            LOWORD(version) <= buggy.minor_version_)) {
  71         return true;
  72       }
  73     }
  74   }
  75
  76   return false;
  77 }
  78
  79 BuggyBhoTls::BuggyBhoTls()
  80     : patched_(false) {
  81   DCHECK(s_bad_object_tls_.Get() == NULL);
  82   s_bad_object_tls_.Set(this);
  83 }
  84
  85 BuggyBhoTls::~BuggyBhoTls() {
  86   DCHECK(BuggyBhoTls::GetInstance() == this);
  87   s_bad_object_tls_.Set(NULL);
  88 }
  89
  90 void BuggyBhoTls::AddBuggyObject(IDispatch* obj) {
  91   bad_objects_.push_back(obj);
  92 }
  93
  94 bool BuggyBhoTls::ShouldSkipInvoke(IDispatch* obj) const {
  95   DCHECK(web_browser2_ != NULL);
  96   if (IsChromeFrameDocument(web_browser2_)) {
  97     return std::find(bad_objects_.begin(), bad_objects_.end(), obj) !=
  98            bad_objects_.end();
  99   }
 100   return false;
 101 }
 102
 103 // static
 104 BuggyBhoTls* BuggyBhoTls::GetInstance() {
 105   BuggyBhoTls* tls_instance = s_bad_object_tls_.Get();
 106   if (!tls_instance) {
 107     tls_instance = new BuggyBhoTls();
 108     DCHECK(s_bad_object_tls_.Get() != NULL);
 109   }
 110   return tls_instance;
 111 }
 112
 113 // static
 114 void BuggyBhoTls::DestroyInstance() {
 115   BuggyBhoTls* tls_instance = s_bad_object_tls_.Get();
 116   if (tls_instance) {
 117     delete tls_instance;
 118     DCHECK(s_bad_object_tls_.Get() == NULL);
 119   }
 120 }
 121
 122 HRESULT BuggyBhoTls::PatchBuggyBHOs(IWebBrowser2* browser) {
 123   if (patched_)
 124     return S_FALSE;
 125
 126   DCHECK(browser);
 127   DCHECK(web_browser2_ == NULL);
 128
 129   base::win::ScopedComPtr<IConnectionPointContainer> cpc;
 130   HRESULT hr = cpc.QueryFrom(browser);
 131   if (SUCCEEDED(hr)) {
 132     const GUID sinks[] = { DIID_DWebBrowserEvents2, DIID_DWebBrowserEvents };
 133     for (size_t i = 0; i < arraysize(sinks); ++i) {
 134       base::win::ScopedComPtr<IConnectionPoint> cp;
 135       cpc->FindConnectionPoint(sinks[i], cp.Receive());
 136       if (cp) {
 137         base::win::ScopedComPtr<IEnumConnections> connections;
 138         cp->EnumConnections(connections.Receive());
 139         if (connections) {
 140           CONNECTDATA cd = {0};
 141           DWORD fetched = 0;
 142           while (connections->Next(1, &cd, &fetched) == S_OK && fetched) {
 143             PatchIfBuggy(cd.pUnk, sinks[i]);
 144             cd.pUnk->Release();
 145             fetched = 0;
 146           }
 147         }
 148       }
 149     }
 150   }
 151   patched_ = true;
 152   web_browser2_ = browser;
 153   return hr;
 154 }
 155
 156 bool BuggyBhoTls::PatchIfBuggy(IUnknown* unk, const IID& diid) {
 157   DCHECK(unk);
 158   PROC* methods = *reinterpret_cast<PROC**>(unk);
 159   HMODULE mod = base::GetModuleFromAddress(methods[0]);
 160   if (!IsBuggyBho(mod))
 161     return false;
 162
 163   base::win::ScopedComPtr<IDispatch> disp;
 164   HRESULT hr = unk->QueryInterface(diid,
 165       reinterpret_cast<void**>(disp.Receive()));
 166   if (FAILED(hr))  // Sometimes only IDispatch QI is supported
 167     hr = disp.QueryFrom(unk);
 168   DCHECK(SUCCEEDED(hr));
 169
 170   if (SUCCEEDED(hr)) {
 171     const int kInvokeIndex = 6;
 172     DCHECK(static_cast<IUnknown*>(disp) == unk);
 173     if (SUCCEEDED(PatchInvokeMethod(&methods[kInvokeIndex]))) {
 174       AddBuggyObject(disp);
 175     }
 176   }
 177   return false;
 178 }
 179
 180 // static
 181 STDMETHODIMP BuggyBhoTls::BuggyBhoInvoke(InvokeFunc original, IDispatch* me,
 182                                          DISPID dispid, REFIID riid, LCID lcid,
 183                                          WORD flags, DISPPARAMS* params,
 184                                          VARIANT* result, EXCEPINFO* ei,
 185                                          UINT* err) {
 186   DVLOG(1) << __FUNCTION__;
 187
 188   DCHECK(BuggyBhoTls::GetInstance())
 189       << "You must first have an instance of BuggyBhoTls on this thread";
 190   if (BuggyBhoTls::GetInstance() &&
 191       BuggyBhoTls::GetInstance()->ShouldSkipInvoke(me)) {
 192     // Ignore this call and avoid the bug.
 193     // TODO(tommi): Maybe we should check a specific list of DISPIDs too?
 194     return S_OK;
 195   }
 196
 197   // No need to report crashes in those known-to-be-buggy DLLs.
 198   ExceptionBarrierReportOnlyModule barrier;
 199   return original(me, dispid, riid, lcid, flags, params, result, ei, err);
 200 }
 201
 202 // static
 203 HRESULT BuggyBhoTls::PatchInvokeMethod(PROC* invoke) {
 204   CCritSecLock lock(_pAtlModule->m_csStaticDataInitAndTypeInfo.m_sec, true);
 205
 206   FunctionStub* stub = FunctionStub::FromCode(*invoke);
 207   if (stub)
 208     return S_FALSE;
 209
 210   DWORD flags = 0;
 211   if (!::VirtualProtect(invoke, sizeof(PROC), PAGE_EXECUTE_READWRITE, &flags))
 212     return AtlHresultFromLastError();
 213
 214   HRESULT hr = S_OK;
 215
 216   stub = FunctionStub::Create(reinterpret_cast<uintptr_t>(*invoke),
 217                               BuggyBhoInvoke);
 218   if (!stub) {
 219     hr = E_OUTOFMEMORY;
 220   } else {
 221     if (!vtable_patch::internal::ReplaceFunctionPointer(
 222             reinterpret_cast<void**>(invoke), stub->code(),
 223             reinterpret_cast<void*>(stub->argument()))) {
 224       hr = E_UNEXPECTED;
 225       FunctionStub::Destroy(stub);
 226     } else {
 227       PinModule();  // No backing out now.
 228       ::FlushInstructionCache(::GetCurrentProcess(), invoke, sizeof(PROC));
 229     }
 230   }
 231   ::VirtualProtect(invoke, sizeof(PROC), flags, &flags);
 232   return hr;
 233 }
 234
 235 }  // end namespace buggy_bho