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