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Issue #27932: Prevent memory leak in win32_ver().

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This commit is contained in:
Steve Dower 2016-09-17 17:25:42 -07:00
parent 1c75c18ed2
commit 1ec262be80
3 changed files with 40 additions and 60 deletions
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37
Python/sysmodule.c
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@ -825,6 +825,7 @@ static PyStructSequence_Field windows_version_fields[] = {
{"service_pack_minor", "Service Pack minor version number"},
{"suite_mask", "Bit mask identifying available product suites"},
{"product_type", "System product type"},
{"_platform_version", "Diagnostic version number"},
{0}
};
@ -849,6 +850,12 @@ sys_getwindowsversion(PyObject *self)
PyObject *version;
int pos = 0;
OSVERSIONINFOEX ver;
DWORD realMajor, realMinor, realBuild;
HANDLE hKernel32;
wchar_t kernel32_path[MAX_PATH];
LPVOID verblock;
DWORD verblock_size;
ver.dwOSVersionInfoSize = sizeof(ver);
if (!GetVersionEx((OSVERSIONINFO*) &ver))
return PyErr_SetFromWindowsErr(0);
@ -867,10 +874,40 @@ sys_getwindowsversion(PyObject *self)
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wSuiteMask));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wProductType));
realMajor = ver.dwMajorVersion;
realMinor = ver.dwMinorVersion;
realBuild = ver.dwBuildNumber;
// GetVersion will lie if we are running in a compatibility mode.
// We need to read the version info from a system file resource
// to accurately identify the OS version. If we fail for any reason,
// just return whatever GetVersion said.
hKernel32 = GetModuleHandleW(L"kernel32.dll");
if (hKernel32 && GetModuleFileNameW(hKernel32, kernel32_path, MAX_PATH) &&
(verblock_size = GetFileVersionInfoSizeW(kernel32_path, NULL)) &&
(verblock = PyMem_RawMalloc(verblock_size))) {
VS_FIXEDFILEINFO *ffi;
UINT ffi_len;
if (GetFileVersionInfoW(kernel32_path, 0, verblock_size, verblock) &&
VerQueryValueW(verblock, L"", (LPVOID)&ffi, &ffi_len)) {
realMajor = HIWORD(ffi->dwProductVersionMS);
realMinor = LOWORD(ffi->dwProductVersionMS);
realBuild = HIWORD(ffi->dwProductVersionLS);
}
PyMem_RawFree(verblock);
}
PyStructSequence_SET_ITEM(version, pos++, PyTuple_Pack(3,
PyLong_FromLong(realMajor),
PyLong_FromLong(realMinor),
PyLong_FromLong(realBuild)
));
if (PyErr_Occurred()) {
Py_DECREF(version);
return NULL;
}
return version;
}