Jacek Caban : rpcrt4: Fix use after free in get_iface_info.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bfab009e67338d3f6b0142c55ec3383a5147f6a3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=bfab009e67338d3f6b0142c55ec3383a5147f6a3

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Thu Mar 26 20:54:05 2020 +0100

rpcrt4: Fix use after free in get_iface_info.

Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/rpcrt4/ndr_typelib.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/dlls/rpcrt4/ndr_typelib.c b/dlls/rpcrt4/ndr_typelib.c
index 91c4a07464..f1f25885b7 100644
--- a/dlls/rpcrt4/ndr_typelib.c
+++ b/dlls/rpcrt4/ndr_typelib.c
@@ -1276,18 +1276,18 @@ static HRESULT get_iface_info(ITypeInfo *typeinfo, WORD *funcs, WORD *parentfunc
     if (FAILED(hr))
         goto err;
     hr = ITypeInfo_GetRefTypeInfo(*real_typeinfo, reftype, &parentinfo);
-    if (SUCCEEDED(hr))
-    {
-        hr = ITypeInfo_GetTypeAttr(parentinfo, &typeattr);
-        ITypeInfo_Release(parentinfo);
-    }
     if (FAILED(hr))
         goto err;
 
-    *parentiid = typeattr->guid;
-    ITypeInfo_ReleaseTypeAttr(parentinfo, typeattr);
-
-    return S_OK;
+    hr = ITypeInfo_GetTypeAttr(parentinfo, &typeattr);
+    if (SUCCEEDED(hr))
+    {
+        *parentiid = typeattr->guid;
+        ITypeInfo_ReleaseTypeAttr(parentinfo, typeattr);
+    }
+    ITypeInfo_Release(parentinfo);
+    if (SUCCEEDED(hr))
+        return hr;
 
 err:
     ITypeInfo_Release(*real_typeinfo);