mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
c4a66fb77a
Backed out changeset 16b840c2de31 (bug 951827) Backed out changeset 8fb155711dfe (bug 951827) Backed out changeset 1109dba48e6b (bug 951827) Backed out changeset 236ed76eea8b (bug 951827) Backed out changeset 96cf7c13a8cb (bug 951827)
657 lines
19 KiB
C++
657 lines
19 KiB
C++
/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <windows.h>
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#include <winternl.h>
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#include <io.h>
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#pragma warning( push )
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#pragma warning( disable : 4275 4530 ) // See msvc-stl-wrapper.template.h
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#include <map>
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#pragma warning( pop )
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#define MOZ_NO_MOZALLOC
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#include "nsAutoPtr.h"
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#include "nsWindowsDllInterceptor.h"
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#include "mozilla/WindowsVersion.h"
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#include "nsWindowsHelpers.h"
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using namespace mozilla;
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#define ALL_VERSIONS ((unsigned long long)-1LL)
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// DLLs sometimes ship without a version number, particularly early
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// releases. Blocking "version <= 0" has the effect of blocking unversioned
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// DLLs (since the call to get version info fails), but not blocking
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// any versioned instance.
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#define UNVERSIONED ((unsigned long long)0LL)
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// Convert the 4 (decimal) components of a DLL version number into a
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// single unsigned long long, as needed by the blocklist
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#define MAKE_VERSION(a,b,c,d)\
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((a##ULL << 48) + (b##ULL << 32) + (c##ULL << 16) + d##ULL)
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struct DllBlockInfo {
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// The name of the DLL -- in LOWERCASE! It will be compared to
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// a lowercase version of the DLL name only.
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const char *name;
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// If maxVersion is ALL_VERSIONS, we'll block all versions of this
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// dll. Otherwise, we'll block all versions less than or equal to
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// the given version, as queried by GetFileVersionInfo and
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// VS_FIXEDFILEINFO's dwFileVersionMS and dwFileVersionLS fields.
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//
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// Note that the version is usually 4 components, which is A.B.C.D
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// encoded as 0x AAAA BBBB CCCC DDDD ULL (spaces added for clarity),
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// but it's not required to be of that format.
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unsigned long long maxVersion;
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enum {
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FLAGS_DEFAULT = 0,
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BLOCK_WIN8PLUS_ONLY = 1
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} flags;
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};
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static DllBlockInfo sWindowsDllBlocklist[] = {
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// EXAMPLE:
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// { "uxtheme.dll", ALL_VERSIONS },
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// { "uxtheme.dll", 0x0000123400000000ULL },
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// The DLL name must be in lowercase!
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// NPFFAddon - Known malware
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{ "npffaddon.dll", ALL_VERSIONS},
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// AVG 8 - Antivirus vendor AVG, old version, plugin already blocklisted
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{"avgrsstx.dll", MAKE_VERSION(8,5,0,401)},
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// calc.dll - Suspected malware
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{"calc.dll", MAKE_VERSION(1,0,0,1)},
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// hook.dll - Suspected malware
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{"hook.dll", ALL_VERSIONS},
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// GoogleDesktopNetwork3.dll - Extremely old, unversioned instances
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// of this DLL cause crashes
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{"googledesktopnetwork3.dll", UNVERSIONED},
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// rdolib.dll - Suspected malware
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{"rdolib.dll", MAKE_VERSION(6,0,88,4)},
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// fgjk4wvb.dll - Suspected malware
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{"fgjk4wvb.dll", MAKE_VERSION(8,8,8,8)},
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// radhslib.dll - Naomi internet filter - unmaintained since 2006
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{"radhslib.dll", UNVERSIONED},
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// Music download filter for vkontakte.ru - old instances
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// of this DLL cause crashes
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{"vksaver.dll", MAKE_VERSION(2,2,2,0)},
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// Topcrash in Firefox 4.0b1
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{"rlxf.dll", MAKE_VERSION(1,2,323,1)},
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// psicon.dll - Topcrashes in Thunderbird, and some crashes in Firefox
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// Adobe photoshop library, now redundant in later installations
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{"psicon.dll", ALL_VERSIONS},
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// Topcrash in Firefox 4 betas (bug 618899)
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{"accelerator.dll", MAKE_VERSION(3,2,1,6)},
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// Topcrash with Roboform in Firefox 8 (bug 699134)
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{"rf-firefox.dll", MAKE_VERSION(7,6,1,0)},
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{"roboform.dll", MAKE_VERSION(7,6,1,0)},
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// Topcrash with Babylon Toolbar on FF16+ (bug 721264)
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{"babyfox.dll", ALL_VERSIONS},
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// sprotector.dll crashes, bug 957258
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{"sprotector.dll", ALL_VERSIONS},
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// Topcrash with Websense Endpoint, bug 828184
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{"qipcap.dll", MAKE_VERSION(7, 6, 815, 1)},
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// leave these two in always for tests
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{ "mozdllblockingtest.dll", ALL_VERSIONS },
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{ "mozdllblockingtest_versioned.dll", 0x0000000400000000ULL },
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// Windows Media Foundation FLAC decoder and type sniffer (bug 839031).
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{ "mfflac.dll", ALL_VERSIONS },
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// Older Relevant Knowledge DLLs cause us to crash (bug 904001).
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{ "rlnx.dll", MAKE_VERSION(1, 3, 334, 9) },
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{ "pmnx.dll", MAKE_VERSION(1, 3, 334, 9) },
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{ "opnx.dll", MAKE_VERSION(1, 3, 334, 9) },
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{ "prnx.dll", MAKE_VERSION(1, 3, 334, 9) },
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// Older belgian ID card software causes Firefox to crash or hang on
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// shutdown, bug 831285 and 918399.
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{ "beid35cardlayer.dll", MAKE_VERSION(3, 5, 6, 6968) },
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// bug 925459, bitguard crashes
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{ "bitguard.dll", ALL_VERSIONS },
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// bug 812683 - crashes in Windows library when Asus Gamer OSD is installed
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// Software is discontinued/unsupported
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{ "atkdx11disp.dll", ALL_VERSIONS },
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// Topcrash with Conduit SearchProtect, bug 944542
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{ "spvc32.dll", ALL_VERSIONS },
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{ nullptr, 0 }
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};
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#ifndef STATUS_DLL_NOT_FOUND
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#define STATUS_DLL_NOT_FOUND ((DWORD)0xC0000135L)
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#endif
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// define this for very verbose dll load debug spew
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#undef DEBUG_very_verbose
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static const char kBlockedDllsParameter[] = "BlockedDllList=";
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static const int kBlockedDllsParameterLen =
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sizeof(kBlockedDllsParameter) - 1;
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static const char kBlocklistInitFailedParameter[] = "BlocklistInitFailed=1\n";
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static const int kBlocklistInitFailedParameterLen =
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sizeof(kBlocklistInitFailedParameter) - 1;
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static const char kUser32BeforeBlocklistParameter[] = "User32BeforeBlocklist=1\n";
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static const int kUser32BeforeBlocklistParameterLen =
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sizeof(kUser32BeforeBlocklistParameter) - 1;
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static DWORD sThreadLoadingXPCOMModule;
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static bool sBlocklistInitFailed;
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static bool sUser32BeforeBlocklist;
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// Duplicated from xpcom glue. Ideally this should be shared.
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void
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printf_stderr(const char *fmt, ...)
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{
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if (IsDebuggerPresent()) {
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char buf[2048];
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va_list args;
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va_start(args, fmt);
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vsnprintf(buf, sizeof(buf), fmt, args);
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buf[sizeof(buf) - 1] = '\0';
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va_end(args);
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OutputDebugStringA(buf);
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}
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FILE *fp = _fdopen(_dup(2), "a");
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if (!fp)
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return;
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va_list args;
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va_start(args, fmt);
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vfprintf(fp, fmt, args);
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va_end(args);
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fclose(fp);
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}
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namespace {
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typedef NTSTATUS (NTAPI *LdrLoadDll_func) (PWCHAR filePath, PULONG flags, PUNICODE_STRING moduleFileName, PHANDLE handle);
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static LdrLoadDll_func stub_LdrLoadDll = 0;
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template <class T>
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struct RVAMap {
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RVAMap(HANDLE map, DWORD offset) {
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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DWORD alignedOffset = (offset / info.dwAllocationGranularity) *
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info.dwAllocationGranularity;
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MOZ_ASSERT(offset - alignedOffset < info.dwAllocationGranularity, "Wtf");
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mRealView = ::MapViewOfFile(map, FILE_MAP_READ, 0, alignedOffset,
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sizeof(T) + (offset - alignedOffset));
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mMappedView = mRealView ? reinterpret_cast<T*>((char*)mRealView + (offset - alignedOffset)) :
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nullptr;
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}
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~RVAMap() {
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if (mRealView) {
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::UnmapViewOfFile(mRealView);
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}
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}
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operator const T*() const { return mMappedView; }
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const T* operator->() const { return mMappedView; }
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private:
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const T* mMappedView;
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void* mRealView;
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};
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bool
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CheckASLR(const wchar_t* path)
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{
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bool retval = false;
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HANDLE file = ::CreateFileW(path, GENERIC_READ, FILE_SHARE_READ,
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nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (file != INVALID_HANDLE_VALUE) {
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HANDLE map = ::CreateFileMappingW(file, nullptr, PAGE_READONLY, 0, 0,
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nullptr);
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if (map) {
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RVAMap<IMAGE_DOS_HEADER> peHeader(map, 0);
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if (peHeader) {
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RVAMap<IMAGE_NT_HEADERS> ntHeader(map, peHeader->e_lfanew);
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if (ntHeader) {
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// If the DLL has no code, permit it regardless of ASLR status.
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if (ntHeader->OptionalHeader.SizeOfCode == 0) {
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retval = true;
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}
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// Check to see if the DLL supports ASLR
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else if ((ntHeader->OptionalHeader.DllCharacteristics &
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IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE) != 0) {
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retval = true;
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}
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}
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}
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::CloseHandle(map);
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}
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::CloseHandle(file);
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}
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return retval;
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}
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// This lock protects both the reentrancy sentinel and the crash reporter
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// data structures.
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static CRITICAL_SECTION sLock;
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/**
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* Some versions of Windows call LoadLibraryEx to get the version information
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* for a DLL, which causes our patched LdrLoadDll implementation to re-enter
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* itself and cause infinite recursion and a stack-exhaustion crash. We protect
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* against reentrancy by allowing recursive loads of the same DLL.
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*
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* Note that we don't use __declspec(thread) because that doesn't work in DLLs
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* loaded via LoadLibrary and there can be a limited number of TLS slots, so
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* we roll our own.
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*/
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class ReentrancySentinel
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{
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public:
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explicit ReentrancySentinel(const char* dllName)
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{
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DWORD currentThreadId = GetCurrentThreadId();
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AutoCriticalSection lock(&sLock);
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mPreviousDllName = (*sThreadMap)[currentThreadId];
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// If there is a DLL currently being loaded and it has the same name
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// as the current attempt, we're re-entering.
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mReentered = mPreviousDllName && !stricmp(mPreviousDllName, dllName);
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(*sThreadMap)[currentThreadId] = dllName;
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}
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~ReentrancySentinel()
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{
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DWORD currentThreadId = GetCurrentThreadId();
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AutoCriticalSection lock(&sLock);
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(*sThreadMap)[currentThreadId] = mPreviousDllName;
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}
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bool BailOut() const
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{
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return mReentered;
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};
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static void InitializeStatics()
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{
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InitializeCriticalSection(&sLock);
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sThreadMap = new std::map<DWORD, const char*>;
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}
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private:
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static std::map<DWORD, const char*>* sThreadMap;
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const char* mPreviousDllName;
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bool mReentered;
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};
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std::map<DWORD, const char*>* ReentrancySentinel::sThreadMap;
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/**
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* This is a linked list of DLLs that have been blocked. It doesn't use
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* mozilla::LinkedList because this is an append-only list and doesn't need
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* to be doubly linked.
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*/
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class DllBlockSet
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{
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public:
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static void Add(const char* name, unsigned long long version);
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// Write the list of blocked DLLs to a file HANDLE. This method is run after
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// a crash occurs and must therefore not use the heap, etc.
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static void Write(HANDLE file);
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private:
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DllBlockSet(const char* name, unsigned long long version)
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: mName(name)
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, mVersion(version)
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, mNext(nullptr)
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{
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}
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const char* mName; // points into the sWindowsDllBlocklist string
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unsigned long long mVersion;
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DllBlockSet* mNext;
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static DllBlockSet* gFirst;
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};
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DllBlockSet* DllBlockSet::gFirst;
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void
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DllBlockSet::Add(const char* name, unsigned long long version)
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{
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AutoCriticalSection lock(&sLock);
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for (DllBlockSet* b = gFirst; b; b = b->mNext) {
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if (0 == strcmp(b->mName, name) && b->mVersion == version) {
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return;
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}
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}
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// Not already present
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DllBlockSet* n = new DllBlockSet(name, version);
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n->mNext = gFirst;
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gFirst = n;
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}
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void
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DllBlockSet::Write(HANDLE file)
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{
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AutoCriticalSection lock(&sLock);
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DWORD nBytes;
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// Because this method is called after a crash occurs, and uses heap memory,
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// protect this entire block with a structured exception handler.
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MOZ_SEH_TRY {
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for (DllBlockSet* b = gFirst; b; b = b->mNext) {
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// write name[,v.v.v.v];
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WriteFile(file, b->mName, strlen(b->mName), &nBytes, nullptr);
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if (b->mVersion != -1) {
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WriteFile(file, ",", 1, &nBytes, nullptr);
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uint16_t parts[4];
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parts[0] = b->mVersion >> 48;
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parts[1] = (b->mVersion >> 32) & 0xFFFF;
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parts[2] = (b->mVersion >> 16) & 0xFFFF;
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parts[3] = b->mVersion & 0xFFFF;
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for (int p = 0; p < 4; ++p) {
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char buf[32];
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ltoa(parts[p], buf, 10);
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WriteFile(file, buf, strlen(buf), &nBytes, nullptr);
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if (p != 3) {
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WriteFile(file, ".", 1, &nBytes, nullptr);
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}
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}
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}
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WriteFile(file, ";", 1, &nBytes, nullptr);
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}
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}
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MOZ_SEH_EXCEPT (EXCEPTION_EXECUTE_HANDLER) { }
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}
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static
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wchar_t* getFullPath (PWCHAR filePath, wchar_t* fname)
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{
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// In Windows 8, the first parameter seems to be used for more than just the
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// path name. For example, its numerical value can be 1. Passing a non-valid
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// pointer to SearchPathW will cause a crash, so we need to check to see if we
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// are handed a valid pointer, and otherwise just pass nullptr to SearchPathW.
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PWCHAR sanitizedFilePath = (intptr_t(filePath) < 1024) ? nullptr : filePath;
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// figure out the length of the string that we need
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DWORD pathlen = SearchPathW(sanitizedFilePath, fname, L".dll", 0, nullptr,
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nullptr);
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if (pathlen == 0) {
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return nullptr;
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}
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wchar_t* full_fname = new wchar_t[pathlen+1];
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if (!full_fname) {
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// couldn't allocate memory?
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return nullptr;
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}
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// now actually grab it
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SearchPathW(sanitizedFilePath, fname, L".dll", pathlen + 1, full_fname,
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nullptr);
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return full_fname;
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}
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// No builtin function to find the last character matching a set
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static wchar_t* lastslash(wchar_t* s, int len)
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{
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for (wchar_t* c = s + len - 1; c >= s; --c) {
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if (*c == L'\\' || *c == L'/') {
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return c;
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}
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}
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return nullptr;
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}
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static NTSTATUS NTAPI
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patched_LdrLoadDll (PWCHAR filePath, PULONG flags, PUNICODE_STRING moduleFileName, PHANDLE handle)
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{
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// We have UCS2 (UTF16?), we want ASCII, but we also just want the filename portion
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#define DLLNAME_MAX 128
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char dllName[DLLNAME_MAX+1];
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wchar_t *dll_part;
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DllBlockInfo *info;
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int len = moduleFileName->Length / 2;
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wchar_t *fname = moduleFileName->Buffer;
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nsAutoArrayPtr<wchar_t> full_fname;
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// The filename isn't guaranteed to be null terminated, but in practice
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// it always will be; ensure that this is so, and bail if not.
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// This is done instead of the more robust approach because of bug 527122,
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// where lots of weird things were happening when we tried to make a copy.
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if (moduleFileName->MaximumLength < moduleFileName->Length+2 ||
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fname[len] != 0)
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{
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#ifdef DEBUG
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printf_stderr("LdrLoadDll: non-null terminated string found!\n");
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#endif
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goto continue_loading;
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}
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dll_part = lastslash(fname, len);
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if (dll_part) {
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dll_part = dll_part + 1;
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len -= dll_part - fname;
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} else {
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dll_part = fname;
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}
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#ifdef DEBUG_very_verbose
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printf_stderr("LdrLoadDll: dll_part '%S' %d\n", dll_part, len);
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#endif
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// if it's too long, then, we assume we won't want to block it,
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// since DLLNAME_MAX should be at least long enough to hold the longest
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// entry in our blocklist.
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if (len > DLLNAME_MAX) {
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#ifdef DEBUG
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printf_stderr("LdrLoadDll: len too long! %d\n", len);
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#endif
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goto continue_loading;
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}
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// copy over to our char byte buffer, lowercasing ASCII as we go
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for (int i = 0; i < len; i++) {
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wchar_t c = dll_part[i];
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if (c > 0x7f) {
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// welp, it's not ascii; if we need to add non-ascii things to
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// our blocklist, we'll have to remove this limitation.
|
|
goto continue_loading;
|
|
}
|
|
|
|
// ensure that dll name is all lowercase
|
|
if (c >= 'A' && c <= 'Z')
|
|
c += 'a' - 'A';
|
|
|
|
dllName[i] = (char) c;
|
|
}
|
|
|
|
dllName[len] = 0;
|
|
|
|
#ifdef DEBUG_very_verbose
|
|
printf_stderr("LdrLoadDll: dll name '%s'\n", dllName);
|
|
#endif
|
|
|
|
// then compare to everything on the blocklist
|
|
info = &sWindowsDllBlocklist[0];
|
|
while (info->name) {
|
|
if (strcmp(info->name, dllName) == 0)
|
|
break;
|
|
|
|
info++;
|
|
}
|
|
|
|
if (info->name) {
|
|
bool load_ok = false;
|
|
|
|
#ifdef DEBUG_very_verbose
|
|
printf_stderr("LdrLoadDll: info->name: '%s'\n", info->name);
|
|
#endif
|
|
|
|
if ((info->flags == DllBlockInfo::BLOCK_WIN8PLUS_ONLY) &&
|
|
!IsWin8OrLater()) {
|
|
goto continue_loading;
|
|
}
|
|
|
|
unsigned long long fVersion = ALL_VERSIONS;
|
|
|
|
if (info->maxVersion != ALL_VERSIONS) {
|
|
ReentrancySentinel sentinel(dllName);
|
|
if (sentinel.BailOut()) {
|
|
goto continue_loading;
|
|
}
|
|
|
|
full_fname = getFullPath(filePath, fname);
|
|
if (!full_fname) {
|
|
// uh, we couldn't find the DLL at all, so...
|
|
printf_stderr("LdrLoadDll: Blocking load of '%s' (SearchPathW didn't find it?)\n", dllName);
|
|
return STATUS_DLL_NOT_FOUND;
|
|
}
|
|
|
|
DWORD zero;
|
|
DWORD infoSize = GetFileVersionInfoSizeW(full_fname, &zero);
|
|
|
|
// If we failed to get the version information, we block.
|
|
|
|
if (infoSize != 0) {
|
|
nsAutoArrayPtr<unsigned char> infoData(new unsigned char[infoSize]);
|
|
VS_FIXEDFILEINFO *vInfo;
|
|
UINT vInfoLen;
|
|
|
|
if (GetFileVersionInfoW(full_fname, 0, infoSize, infoData) &&
|
|
VerQueryValueW(infoData, L"\\", (LPVOID*) &vInfo, &vInfoLen))
|
|
{
|
|
fVersion =
|
|
((unsigned long long)vInfo->dwFileVersionMS) << 32 |
|
|
((unsigned long long)vInfo->dwFileVersionLS);
|
|
|
|
// finally do the version check, and if it's greater than our block
|
|
// version, keep loading
|
|
if (fVersion > info->maxVersion)
|
|
load_ok = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!load_ok) {
|
|
printf_stderr("LdrLoadDll: Blocking load of '%s' -- see http://www.mozilla.com/en-US/blocklist/\n", dllName);
|
|
DllBlockSet::Add(info->name, fVersion);
|
|
return STATUS_DLL_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
continue_loading:
|
|
#ifdef DEBUG_very_verbose
|
|
printf_stderr("LdrLoadDll: continuing load... ('%S')\n", moduleFileName->Buffer);
|
|
#endif
|
|
|
|
if (GetCurrentThreadId() == sThreadLoadingXPCOMModule) {
|
|
// Check to ensure that the DLL has ASLR.
|
|
full_fname = getFullPath(filePath, fname);
|
|
if (!full_fname) {
|
|
// uh, we couldn't find the DLL at all, so...
|
|
printf_stderr("LdrLoadDll: Blocking load of '%s' (SearchPathW didn't find it?)\n", dllName);
|
|
return STATUS_DLL_NOT_FOUND;
|
|
}
|
|
|
|
if (IsVistaOrLater() && !CheckASLR(full_fname)) {
|
|
printf_stderr("LdrLoadDll: Blocking load of '%s'. XPCOM components must support ASLR.\n", dllName);
|
|
return STATUS_DLL_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
return stub_LdrLoadDll(filePath, flags, moduleFileName, handle);
|
|
}
|
|
|
|
WindowsDllInterceptor NtDllIntercept;
|
|
|
|
} // anonymous namespace
|
|
|
|
NS_EXPORT void
|
|
DllBlocklist_Initialize()
|
|
{
|
|
if (GetModuleHandleA("user32.dll")) {
|
|
sUser32BeforeBlocklist = true;
|
|
}
|
|
|
|
NtDllIntercept.Init("ntdll.dll");
|
|
|
|
ReentrancySentinel::InitializeStatics();
|
|
|
|
bool ok = NtDllIntercept.AddHook("LdrLoadDll", reinterpret_cast<intptr_t>(patched_LdrLoadDll), (void**) &stub_LdrLoadDll);
|
|
|
|
if (!ok) {
|
|
sBlocklistInitFailed = true;
|
|
#ifdef DEBUG
|
|
printf_stderr ("LdrLoadDll hook failed, no dll blocklisting active\n");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
NS_EXPORT void
|
|
DllBlocklist_SetInXPCOMLoadOnMainThread(bool inXPCOMLoadOnMainThread)
|
|
{
|
|
if (inXPCOMLoadOnMainThread) {
|
|
MOZ_ASSERT(sThreadLoadingXPCOMModule == 0, "Only one thread should be doing this");
|
|
sThreadLoadingXPCOMModule = GetCurrentThreadId();
|
|
} else {
|
|
sThreadLoadingXPCOMModule = 0;
|
|
}
|
|
}
|
|
|
|
NS_EXPORT void
|
|
DllBlocklist_WriteNotes(HANDLE file)
|
|
{
|
|
DWORD nBytes;
|
|
|
|
WriteFile(file, kBlockedDllsParameter, kBlockedDllsParameterLen, &nBytes, nullptr);
|
|
DllBlockSet::Write(file);
|
|
WriteFile(file, "\n", 1, &nBytes, nullptr);
|
|
|
|
if (sBlocklistInitFailed) {
|
|
WriteFile(file, kBlocklistInitFailedParameter,
|
|
kBlocklistInitFailedParameterLen, &nBytes, nullptr);
|
|
}
|
|
|
|
if (sUser32BeforeBlocklist) {
|
|
WriteFile(file, kUser32BeforeBlocklistParameter,
|
|
kUser32BeforeBlocklistParameterLen, &nBytes, nullptr);
|
|
}
|
|
}
|