bpo-34770: Fix a possible null pointer dereference in pyshellext.cpp … · python/cpython@936d740 (original) (raw)

Original file line number	Diff line number	Diff line change
@@ -172,6 +172,11 @@ class PyShellExt : public RuntimeClass<
172	172	return E_FAIL;
173	173	}
174	174	auto dd = (DROPDESCRIPTION*)GlobalLock(medium.hGlobal);
	175	+if (!dd) {
	176	+OutputDebugString(L"PyShellExt::UpdateDropDescription - failed to lock DROPDESCRIPTION hGlobal");
	177	+ReleaseStgMedium(&medium);
	178	+return E_FAIL;
	179	+ }
175	180	StringCchCopy(dd->szMessage, sizeof(dd->szMessage) / sizeof(dd->szMessage[0]), DRAG_MESSAGE);
176	181	StringCchCopy(dd->szInsert, sizeof(dd->szInsert) / sizeof(dd->szInsert[0]), PathFindFileNameW(target));
177	182	dd->type = DROPIMAGE_MOVE;