Sergio Gómez Del Rea =?UTF-8?Q?l=20?=: ole32: Prevent adding additional cache entries to static class caches.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3bf32809b0dae5973d2185795044809c5af33550
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=3bf32809b0dae5973d2185795044809c5af33550

Author: Sergio Gómez Del Real <sdelreal at codeweavers.com>
Date:   Tue Jan 23 08:47:24 2018 +0000

ole32: Prevent adding additional cache entries to static class caches.

Signed-off-by: Sergio Gómez Del Real <sdelreal at codeweavers.com>
Signed-off-by: Huw Davies <huw at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ole32/datacache.c  |  2 ++
 dlls/ole32/tests/ole2.c | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/dlls/ole32/datacache.c b/dlls/ole32/datacache.c
index 8c5df32..60ddd38 100644
--- a/dlls/ole32/datacache.c
+++ b/dlls/ole32/datacache.c
@@ -2453,6 +2453,8 @@ static HRESULT WINAPI DataCache_Cache(
         return CACHE_S_SAMECACHE;
     }
 
+    if (This->clsid_static) return DV_E_FORMATETC;
+
     hr = DataCache_CreateEntry(This, &fmt_cpy, advf, FALSE, &cache_entry);
 
     if (SUCCEEDED(hr))
diff --git a/dlls/ole32/tests/ole2.c b/dlls/ole32/tests/ole2.c
index 7fcb1aa..d83ca00 100644
--- a/dlls/ole32/tests/ole2.c
+++ b/dlls/ole32/tests/ole2.c
@@ -2426,6 +2426,29 @@ static void test_data_cache_cache(void)
 
     IDataObject_Release( data );
     IOleCache2_Release( cache );
+
+    /* tests for a static class cache */
+    hr = CreateDataCache( NULL, &CLSID_Picture_Dib, &IID_IOleCache2, (void **)&cache );
+
+    fmt.cfFormat = CF_DIB;
+    fmt.dwAspect = DVASPECT_CONTENT;
+    fmt.tymed = TYMED_HGLOBAL;
+    hr = IOleCache2_Cache( cache, &fmt, 0, &conn );
+    ok( hr == CACHE_S_SAMECACHE, "got %08x\n", hr );
+
+    /* aspect other than DVASPECT_CONTENT should fail */
+    fmt.dwAspect = DVASPECT_THUMBNAIL;
+    hr = IOleCache2_Cache( cache, &fmt, 0, &conn );
+    ok( FAILED(hr), "got %08x\n", hr );
+
+    /* try caching another clip format */
+    fmt.dwAspect = DVASPECT_CONTENT;
+    fmt.cfFormat = CF_METAFILEPICT;
+    fmt.tymed = TYMED_MFPICT;
+    hr = IOleCache2_Cache( cache, &fmt, 0, &conn );
+    ok( FAILED(hr), "got %08x\n", hr );
+
+    IOleCache2_Release( cache );
 }
 
 /* The CLSID_Picture_ classes automatically create appropriate cache entries */