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dwrite: Fix EUDC font collection use after free issue. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
oldstable
Piotr Caban 2017-04-27 17:20:03 +02:00 committed by Alexandre Julliard
parent 0925006822
commit 4d02f2fed6
4 changed files with 16 additions and 10 deletions
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2
dlls/dwrite/dwrite_private.h
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@ -168,7 +168,7 @@ extern HRESULT add_localizedstring(IDWriteLocalizedStrings*,const WCHAR*,const W
extern HRESULT clone_localizedstring(IDWriteLocalizedStrings *iface, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
extern void set_en_localizedstring(IDWriteLocalizedStrings*,const WCHAR*) DECLSPEC_HIDDEN;
extern HRESULT get_system_fontcollection(IDWriteFactory4*,IDWriteFontCollection1**) DECLSPEC_HIDDEN;
extern HRESULT get_eudc_fontcollection(IDWriteFactory4*,IDWriteFontCollection**) DECLSPEC_HIDDEN;
extern HRESULT get_eudc_fontcollection(IDWriteFactory4*,IDWriteFontCollection1**) DECLSPEC_HIDDEN;
extern HRESULT get_textanalyzer(IDWriteTextAnalyzer**) DECLSPEC_HIDDEN;
extern HRESULT create_font_file(IDWriteFontFileLoader *loader, const void *reference_key, UINT32 key_size, IDWriteFontFile **font_file) DECLSPEC_HIDDEN;
extern HRESULT create_localfontfileloader(IDWriteLocalFontFileLoader** iface) DECLSPEC_HIDDEN;

6
dlls/dwrite/font.c
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@ -4052,7 +4052,7 @@ static HRESULT eudc_collection_add_family(IDWriteFactory4 *factory, struct dwrit
return hr;
}
HRESULT get_eudc_fontcollection(IDWriteFactory4 *factory, IDWriteFontCollection **ret)
HRESULT get_eudc_fontcollection(IDWriteFactory4 *factory, IDWriteFontCollection1 **ret)
{
static const WCHAR eudckeyfmtW[] = {'E','U','D','C','\\','%','u',0};
struct dwrite_fontcollection *collection;
@ -4078,7 +4078,9 @@ HRESULT get_eudc_fontcollection(IDWriteFactory4 *factory, IDWriteFontCollection
return hr;
}
*ret = (IDWriteFontCollection*)&collection->IDWriteFontCollection1_iface;
*ret = &collection->IDWriteFontCollection1_iface;
collection->factory = factory;
IDWriteFactory4_AddRef(factory);
/* return empty collection if EUDC fonts are not configured */
sprintfW(eudckeypathW, eudckeyfmtW, GetACP());

15
dlls/dwrite/main.c
View File

@ -537,7 +537,7 @@ struct dwritefactory {
LONG ref;
IDWriteFontCollection1 *system_collection;
IDWriteFontCollection *eudc_collection;
IDWriteFontCollection1 *eudc_collection;
IDWriteGdiInterop1 *gdiinterop;
IDWriteFontFallback *fallback;
@ -592,7 +592,7 @@ static void release_dwritefactory(struct dwritefactory *factory)
if (factory->system_collection)
IDWriteFontCollection1_Release(factory->system_collection);
if (factory->eudc_collection)
IDWriteFontCollection_Release(factory->eudc_collection);
IDWriteFontCollection1_Release(factory->eudc_collection);
if (factory->fallback)
release_system_fontfallback(factory->fallback);
heap_free(factory);
@ -1201,13 +1201,12 @@ static HRESULT WINAPI dwritefactory1_GetEudcFontCollection(IDWriteFactory4 *ifac
if (check_for_updates)
FIXME("checking for eudc updates not implemented\n");
if (!This->eudc_collection)
if (This->eudc_collection)
IDWriteFontCollection1_AddRef(This->eudc_collection);
else
hr = get_eudc_fontcollection(iface, &This->eudc_collection);
if (SUCCEEDED(hr))
IDWriteFontCollection_AddRef(This->eudc_collection);
*collection = This->eudc_collection;
*collection = (IDWriteFontCollection*)This->eudc_collection;
return hr;
}
@ -1665,6 +1664,8 @@ void factory_detach_fontcollection(IDWriteFactory4 *iface, IDWriteFontCollection
struct dwritefactory *factory = impl_from_IDWriteFactory4(iface);
if (factory->system_collection == collection)
factory->system_collection = NULL;
if (factory->eudc_collection == collection)
factory->eudc_collection = NULL;
IDWriteFactory4_Release(iface);
}

3
dlls/dwrite/tests/font.c
View File

@ -4366,10 +4366,13 @@ static void test_GetEudcFontCollection(void)
return;
}
EXPECT_REF(factory1, 1);
hr = IDWriteFactory1_GetEudcFontCollection(factory1, &coll, FALSE);
ok(hr == S_OK, "got 0x%08x\n", hr);
EXPECT_REF(factory1, 2);
hr = IDWriteFactory1_GetEudcFontCollection(factory1, &coll2, FALSE);
ok(hr == S_OK, "got 0x%08x\n", hr);
EXPECT_REF(factory1, 2);
ok(coll == coll2, "got %p, %p\n", coll, coll2);
IDWriteFontCollection_Release(coll);
IDWriteFontCollection_Release(coll2);