[PATCH] wbemdisp: Fix a crash on null interface pointer

[Nikolay Sivov]

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
---

For https://bugs.winehq.org/show_bug.cgi?id=40959

 dlls/wbemdisp/locator.c        |  3 ++-
 dlls/wbemdisp/tests/wbemdisp.c | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/dlls/wbemdisp/locator.c b/dlls/wbemdisp/locator.c
index d1f2609..a8b1568 100644
--- a/dlls/wbemdisp/locator.c
+++ b/dlls/wbemdisp/locator.c
@@ -1224,7 +1224,8 @@ static ULONG WINAPI locator_Release(
     if (!refs)
     {
         TRACE( "destroying %p\n", locator );
-        IWbemLocator_Release( locator->locator );
+        if (locator->locator)
+            IWbemLocator_Release( locator->locator );
         heap_free( locator );
     }
     return refs;
diff --git a/dlls/wbemdisp/tests/wbemdisp.c b/dlls/wbemdisp/tests/wbemdisp.c
index e3d432b..3cc4c86 100644
--- a/dlls/wbemdisp/tests/wbemdisp.c
+++ b/dlls/wbemdisp/tests/wbemdisp.c
@@ -243,9 +243,23 @@ static void test_ParseDisplayName(void)
     IParseDisplayName_Release( displayname );
 }
 
+static void test_locator(void)
+{
+    IUnknown *locator;
+    HRESULT hr;
+
+    hr = CoCreateInstance( &CLSID_SWbemLocator, NULL, CLSCTX_INPROC_SERVER, &IID_IUnknown, (void **)&locator );
+    ok( hr == S_OK, "got %x\n", hr );
+
+    IUnknown_Release( locator );
+}
+
 START_TEST(wbemdisp)
 {
     CoInitialize( NULL );
+
     test_ParseDisplayName();
+    test_locator();
+
     CoUninitialize();
 }
-- 
2.8.1