[ros-diffs] [hpoussin] 19485: In NtUserInsertMenuItem, try to copy the whole MENUITEMINFOW structure from caller. If it fails, try without the last field

In NtUserInsertMenuItem, try to copy the whole MENUITEMINFOW structure
from caller. If it fails, try without the last field
Modified: trunk/reactos/subsys/win32k/ntuser/menu.c
  _____

Modified: trunk/reactos/subsys/win32k/ntuser/menu.c
--- trunk/reactos/subsys/win32k/ntuser/menu.c	2005-11-23 13:13:09 UTC
(rev 19484)
+++ trunk/reactos/subsys/win32k/ntuser/menu.c	2005-11-23 13:45:34 UTC
(rev 19485)
@@ -907,7 +907,7 @@

pos = IntInsertMenuItemToList(MenuObject, MenuItem, pos);

-    DPRINT("IntInsertMenuItemToList = %i\n", pos);
+   DPRINT("IntInsertMenuItemToList = %i\n", pos);

return (pos >= 0);
 }
@@ -1554,24 +1554,37 @@

if(!(Menu = UserGetMenuObject(hMenu)))
    {
-      RETURN(0);
+      RETURN( FALSE);
    }

+   /* Try to copy the whole MENUITEMINFOW structure */
    Status = MmCopyFromCaller(&ItemInfo, UnsafeItemInfo,
sizeof(MENUITEMINFOW));
-   if (! NT_SUCCESS(Status))
+   if (NT_SUCCESS(Status))
    {
-      SetLastNtError(Status);
-      RETURN( FALSE);
+      if (sizeof(MENUITEMINFOW) != ItemInfo.cbSize
+         && FIELD_OFFSET(MENUITEMINFOW, hbmpItem) != ItemInfo.cbSize)
+      {
+         SetLastWin32Error(ERROR_INVALID_PARAMETER);
+         RETURN( FALSE);
+      }
+      RETURN( IntInsertMenuItem(Menu, uItem, fByPosition, &ItemInfo));
    }
-   /* structure can be 44 bytes or 48 bytes in size
-   if (ItemInfo.cbSize != sizeof(MENUITEMINFOW))
+
+   /* Try to copy without last field (not present in older versions) */
+   Status = MmCopyFromCaller(&ItemInfo, UnsafeItemInfo,
FIELD_OFFSET(MENUITEMINFOW, hbmpItem));
+   if (NT_SUCCESS(Status))
    {
-      SetLastWin32Error(ERROR_INVALID_PARAMETER);
-      RETURN( FALSE);
+      if (FIELD_OFFSET(MENUITEMINFOW, hbmpItem) != ItemInfo.cbSize)
+      {
+         SetLastWin32Error(ERROR_INVALID_PARAMETER);
+         RETURN( FALSE);
+      }
+      ItemInfo.hbmpItem = (HBITMAP)0;
+      RETURN( IntInsertMenuItem(Menu, uItem, fByPosition, &ItemInfo));
    }
-   */

-   RETURN( IntInsertMenuItem(Menu, uItem, fByPosition, &ItemInfo));
+   SetLastNtError(Status);
+   RETURN( FALSE);

CLEANUP:
    DPRINT("Leave NtUserInsertMenuItem, ret=%i\n",_ret_);
@@ -1955,7 +1968,7 @@
       return( FALSE);
    }
    if (sizeof(MENUITEMINFOW) != Size
-         && sizeof(MENUITEMINFOW) - sizeof(HBITMAP) != Size
+         && FIELD_OFFSET(MENUITEMINFOW, hbmpItem) != Size
          && sizeof(ROSMENUITEMINFO) != Size)
    {
       SetLastWin32Error(ERROR_INVALID_PARAMETER);
@@ -1969,7 +1982,7 @@
    }
    /* If this is a pre-0x0500 _WIN32_WINNT MENUITEMINFOW, you can't
       set/get hbmpItem */
-   if (sizeof(MENUITEMINFOW) - sizeof(HBITMAP) == Size
+   if (FIELD_OFFSET(MENUITEMINFOW, hbmpItem) == Size
          && 0 != (ItemInfo.fMask & MIIM_BITMAP))
    {
       SetLastWin32Error(ERROR_INVALID_PARAMETER);