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oleaut32: Don't release a NULL interface in VARIANT_UserFree(). 

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2018-10-29 23:20:22 -05:00 committed by Alexandre Julliard
parent 5c8329d3fd
commit 96b0bdc38c
2 changed files with 29 additions and 1 deletions
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27
dlls/oleaut32/tests/usrmarshal.c
View File

@ -777,6 +777,7 @@ static void test_marshal_VARIANT(void)
HRESULT hr;
LONG bound, bound2;
VARTYPE vt, vt2;
IUnknown *unk;
stubMsg.RpcMsg = &rpcMsg;
@ -1579,6 +1580,32 @@ todo_wine
ok(heap_unknown->refs == 1, "%d refcounts of IUnknown leaked\n", heap_unknown->refs - 1);
IUnknown_Release(&heap_unknown->IUnknown_iface);
HeapFree(GetProcessHeap(), 0, oldbuffer);
unk = NULL;
VariantInit(&v);
V_VT(&v) = VT_UNKNOWN | VT_BYREF;
V_UNKNOWNREF(&v) = &unk;
rpcMsg.BufferLength = stubMsg.BufferLength = VARIANT_UserSize(&umcb.Flags, 0, &v);
ok(stubMsg.BufferLength >= 28, "size %d\n", stubMsg.BufferLength);
buffer = rpcMsg.Buffer = stubMsg.Buffer = stubMsg.BufferStart = alloc_aligned(stubMsg.BufferLength, &oldbuffer);
stubMsg.BufferEnd = stubMsg.Buffer + stubMsg.BufferLength;
memset(buffer, 0xcc, stubMsg.BufferLength);
next = VARIANT_UserMarshal(&umcb.Flags, buffer, &v);
ok(next == buffer + stubMsg.BufferLength, "got %p expect %p\n", next, buffer + stubMsg.BufferLength);
wirev = (DWORD*)buffer;
wirev = check_variant_header(wirev, &v, stubMsg.BufferLength);
ok(*wirev == 4, "wv[5] %08x\n", *wirev);
VariantInit(&v2);
stubMsg.Buffer = buffer;
next = VARIANT_UserUnmarshal(&umcb.Flags, buffer, &v2);
ok(next == buffer + stubMsg.BufferLength, "got %p expect %p\n", next, buffer + stubMsg.BufferLength);
ok(V_VT(&v) == V_VT(&v2), "got vt %d expect %d\n", V_VT(&v2), V_VT(&v));
ok(!*V_UNKNOWNREF(&v2), "got %p expect NULL\n", *V_UNKNOWNREF(&v2));
VARIANT_UserFree(&umcb.Flags, &v2);
HeapFree(GetProcessHeap(), 0, oldbuffer);
}

3
dlls/oleaut32/usrmarshal.c
View File

@ -647,7 +647,8 @@ void WINAPI VARIANT_UserFree(ULONG *pFlags, VARIANT *pvar)
break;
case VT_UNKNOWN | VT_BYREF:
case VT_DISPATCH | VT_BYREF:
IUnknown_Release(*V_UNKNOWNREF(pvar));
if (*V_UNKNOWNREF(pvar))
IUnknown_Release(*V_UNKNOWNREF(pvar));
break;
}
}