[ros-diffs] [greatlrd] 26756: adding more check for createsurface

Author: greatlrd
Date: Sun May 13 20:51:15 2007
New Revision: 26756

URL: http://svn.reactos.org/svn/reactos?rev=26756&view=rev
Log:
adding more check for createsurface

Modified:
    trunk/reactos/dll/directx/ddraw/Surface/createsurface.c
    trunk/reactos/dll/directx/ddraw/rosdraw.h

Modified: trunk/reactos/dll/directx/ddraw/Surface/createsurface.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/directx/ddraw/Surface/…
==============================================================================
--- trunk/reactos/dll/directx/ddraw/Surface/createsurface.c (original)
+++ trunk/reactos/dll/directx/ddraw/Surface/createsurface.c Sun May 13 20:51:15 2007
@@ -12,7 +12,7 @@
 /*
  * all param have been checked if they are vaild before they are call to 
  * Internal_CreateSurface, if not please fix the code in the functions 
- * call to Internal_CreateSurface, ppSurf are being vaildate in 
+ * call to Internal_CreateSurface, ppSurf,pDDSD,pDDraw  are being vaildate in 
  * Internal_CreateSurface
  */
 
@@ -20,47 +20,69 @@
 Internal_CreateSurface( LPDDRAWI_DIRECTDRAW_INT pDDraw, LPDDSURFACEDESC2 pDDSD,
                         LPDIRECTDRAWSURFACE7 *ppSurf, IUnknown *pUnkOuter)
 {
+    DDSURFACEDESC2 desc;
+
+    /* Test se if the pointers are vaild */
+    if ((IsBadReadPtr(pDDraw,sizeof(LPDDRAWI_DIRECTDRAW_INT))) ||
+       (IsBadReadPtr(pDDSD,sizeof(LPDDSURFACEDESC2))) ||
+       (IsBadWritePtr(ppSurf,sizeof(LPDIRECTDRAWSURFACE7))) ||
+       (IsBadReadPtr(ppSurf,sizeof(LPDIRECTDRAWSURFACE7))))
+    {
+        return DDERR_INVALIDPARAMS;
+    }
+
+    /* make local backup of DDSURFACEDESC2 */
+    RtlCopyMemory(&desc, pDDSD, sizeof(DDSURFACEDESC2));
 
     /* 
      * pDDSD->dwCaps can not contain both DDSCAPS_SYSTEMMEMORY and
DDSCAPS_VIDEOMEMORY
      * if both are define ddraw.dll will return error code 0x88760064
      */
-    if ( (pDDSD->ddsCaps.dwCaps & DDSCAPS_SYSTEMMEMORY) && 
-         (pDDSD->ddsCaps.dwCaps & DDSCAPS_VIDEOMEMORY))
+    if ( (desc.ddsCaps.dwCaps & DDSCAPS_SYSTEMMEMORY) && 
+         (desc.ddsCaps.dwCaps & DDSCAPS_VIDEOMEMORY))
     {
         return DDERR_INVALIDCAPS;
     }
 
     /* check if pDDSD.dwFlags DDSD_LPSURFACE is set or not */
-    if (pDDSD->dwFlags & DDSD_LPSURFACE)
-    {
-
-        if (pDDSD->ddsCaps.dwCaps & ( DDSCAPS_COMPLEX | DDSCAPS_RESERVED2 |
DDSCAPS_RESERVED3 |
+    if (desc.dwFlags & DDSD_LPSURFACE)
+    {
+        /*
+         *  DDSD_LPSURFACE flag is set now we start vaildate see if
+         *  pDDSD->lpSurface are a pointer or not 
+         */
+        if (IsBadReadPtr(desc.lpSurface,sizeof(LPVOID)) ||
+            (desc.dwFlags - (desc.dwFlags & DDSD_ALL)))
+        {
+            return DDERR_INVALIDPARAMS;
+        }
+
+        /* only support dx7 interface for DDSD_LPSURFACE older interface do not support
it */
+        if (pDDraw->lpVtbl != &DirectDraw7_Vtable)
+        {
+            return DDERR_INVALIDPARAMS;
+        }
+
+        /* vaildate the caps */
+        if (desc.ddsCaps.dwCaps & ( DDSCAPS_COMPLEX | DDSCAPS_RESERVED2 |
DDSCAPS_RESERVED3 |
                                        DDSCAPS_VIDEOPORT | DDSCAPS_PRIMARYSURFACE |
DDSCAPS_OVERLAY ))
         {
             return DDERR_INVALIDCAPS;
         }
 
-        /*
-         *  DDSD_LPSURFACE flag is set now we start vaildate see if
-         *  pDDSD->lpSurface are a pointer or not 
-         */
-        if (IsBadReadPtr(pDDSD->lpSurface,sizeof(LPVOID)) ||
-            (pDDSD->dwFlags - (pDDSD->dwFlags & DDSD_ALL)))
-        {
-            return DDERR_INVALIDPARAMS;
-        }
-
         /* more code will follow */
     }
     else
     {
-        /*
-         *  DDSD_LPSURFACE flag is not set we do not handler this case yet
-         */
-
-        /* more code will follow */
-    }
+       /*
+        *  DDSD_LPSURFACE flag are not set
+        *  remove all wrong flags are being set
+        */
+
+        desc.dwFlags = desc.dwFlags & DDSD_ALL;
+    }
+
+
 
     return DDERR_GENERIC;
 }

Modified: trunk/reactos/dll/directx/ddraw/rosdraw.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/directx/ddraw/rosdraw.…
==============================================================================
--- trunk/reactos/dll/directx/ddraw/rosdraw.h (original)
+++ trunk/reactos/dll/directx/ddraw/rosdraw.h Sun May 13 20:51:15 2007
@@ -18,6 +18,7 @@
 extern WCHAR classname[128];
 extern WNDCLASSW wnd_class;
 extern CRITICAL_SECTION ddcs;
+extern IDirectDraw7Vtbl DirectDraw7_Vtable;
 
 HRESULT WINAPI StartDirectDraw(LPDIRECTDRAW* iface, LPGUID pGUID, BOOL reenable);
 HRESULT WINAPI StartDirectDrawHal(LPDIRECTDRAW* iface, BOOL reenable);