Huw Davies : comdlg32: Only copy the valid portion of the structure.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bdbc45fddd583c9273511419e49ff815c516d8c1
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=bdbc45fddd583c9273511419e49ff815c516d8c1

Author: Huw Davies <huw at codeweavers.com>
Date:   Fri Sep 21 13:22:45 2012 +0100

comdlg32: Only copy the valid portion of the structure.

---

 dlls/comdlg32/filedlg31.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/dlls/comdlg32/filedlg31.c b/dlls/comdlg32/filedlg31.c
index 4a78958..f0763c5 100644
--- a/dlls/comdlg32/filedlg31.c
+++ b/dlls/comdlg32/filedlg31.c
@@ -556,8 +556,9 @@ static LRESULT FD31_Validate( const FD31_DATA *lfs, LPCWSTR path, UINT control,
     OPENFILENAMEW ofnsav;
     LPOPENFILENAMEW ofnW = lfs->ofnW;
     WCHAR filename[BUFFILE];
+    int copied_size = min( ofnW->lStructSize, sizeof(ofnsav) );
 
-    ofnsav = *ofnW; /* for later restoring */
+    memcpy( &ofnsav, ofnW, copied_size ); /* for later restoring */
 
     /* get current file name */
     if (path)
@@ -591,7 +592,7 @@ static LRESULT FD31_Validate( const FD31_DATA *lfs, LPCWSTR path, UINT control,
                   0, lfs->lParam );
         if (lRet)
         {
-            *ofnW = ofnsav; /* restore old state */
+            memcpy( ofnW, &ofnsav, copied_size ); /* restore old state */
             return FALSE;
         }
     }