Hans Leidekker : msado15: Fix NULL pointer dereference in close_recordset.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: fb1d46fc0a50f0b74c0f7476d224b56a239003fa
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=fb1d46fc0a50f0b74c0f7476d224b56a239003fa

Author: Hans Leidekker <hans at codeweavers.com>
Date:   Fri May 29 11:30:02 2020 +0200

msado15: Fix NULL pointer dereference in close_recordset.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49281
Signed-off-by: Hans Leidekker <hans at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/msado15/recordset.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/msado15/recordset.c b/dlls/msado15/recordset.c
index 1f16add4c3..ffb3788531 100644
--- a/dlls/msado15/recordset.c
+++ b/dlls/msado15/recordset.c
@@ -748,7 +748,10 @@ static ULONG WINAPI recordset_AddRef( _Recordset *iface )
 
 static void close_recordset( struct recordset *recordset )
 {
-    ULONG row, col, col_count = get_column_count( recordset );
+    ULONG row, col, col_count;
+
+    if (!recordset->fields) return;
+    col_count = get_column_count( recordset );
 
     recordset->fields->recordset = NULL;
     Fields_Release( &recordset->fields->Fields_iface );