ole32: Fix parameter validation for CoGetMalloc().

dlls/ole32/ifs.c

@@ -368,17 +368,22 @@ static const IMallocVtbl VT_IMalloc32 =
  * Retrieves the current IMalloc interface for the process.
  *
  * PARAMS
- *  dwMemContext [I]
- *  lpMalloc     [O] Address where memory allocator object will be stored.
+ *  context [I] Should always be MEMCTX_TASK.
+ *  imalloc [O] Address where memory allocator object will be stored.
  *
  * RETURNS
  *	Success: S_OK.
  *  Failure: HRESULT code.
  */
-HRESULT WINAPI CoGetMalloc(DWORD dwMemContext, LPMALLOC *lpMalloc)
+HRESULT WINAPI CoGetMalloc(DWORD context, IMalloc **imalloc)
 {
-        *lpMalloc = &Malloc32.IMalloc_iface;
-        return S_OK;
+    if (context != MEMCTX_TASK) {
+        *imalloc = NULL;
+        return E_INVALIDARG;
+    }
+
+    *imalloc = &Malloc32.IMalloc_iface;
+    return S_OK;
 }
 
 /***********************************************************************

dlls/ole32/tests/compobj.c

@@ -2629,34 +2629,29 @@ if (0) /* crashes on native */
 
     imalloc = (void*)0xdeadbeef;
     hr = CoGetMalloc(0, &imalloc);
-todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(imalloc == NULL, "got %p\n", imalloc);
-}
+
     imalloc = (void*)0xdeadbeef;
     hr = CoGetMalloc(MEMCTX_SHARED, &imalloc);
-todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(imalloc == NULL, "got %p\n", imalloc);
-}
+
     imalloc = (void*)0xdeadbeef;
     hr = CoGetMalloc(MEMCTX_MACSYSTEM, &imalloc);
-todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(imalloc == NULL, "got %p\n", imalloc);
-}
+
     imalloc = (void*)0xdeadbeef;
     hr = CoGetMalloc(MEMCTX_UNKNOWN, &imalloc);
-todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(imalloc == NULL, "got %p\n", imalloc);
-}
+
     imalloc = (void*)0xdeadbeef;
     hr = CoGetMalloc(MEMCTX_SAME, &imalloc);
-todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(imalloc == NULL, "got %p\n", imalloc);
-}
+
     imalloc = NULL;
     hr = CoGetMalloc(MEMCTX_TASK, &imalloc);
     ok(hr == S_OK, "got 0x%08x\n", hr);