[ros-dev] crash in win32k with the cirrus driver

[Royce Mitchell III]

Hartmut Birr wrote:

>Hi,
>
>if I use the cirrus driver in qemu, I get always wrong colors. After the
>first double click to the cmd icon, ros crashs in
>DIB_16BPP_BitBltSrcCopy. I've add the following code:
>
>Index: subsys/win32k/dib/dib16bpp.c
>===================================================================
>--- subsys/win32k/dib/dib16bpp.c        (Revision 15885)
>+++ subsys/win32k/dib/dib16bpp.c        (Arbeitskopie)
>@@ -228,6 +228,8 @@
>          }
>        else
>          {
>+            DPRINT1("%d %d %d\n", BltInfo->SourceSurface->lDelta,
>BltInfo->SourcePoint.x, BltInfo->SourcePoint.y);
>+            DPRINT1("%d %d %d %d %d\n", BltInfo->DestSurface->lDelta,
>BltInfo->DestRect.left, BltInfo->DestRect.top, BltInfo->DestRect.right,
>BltInfo->DestRect.bottom);
> 
>I see often negative values for the source surface:
>
>...
>(subsys\win32k\dib\dib16bpp.c:231) -1120 -69 -69
>(subsys\win32k\dib\dib16bpp.c:232) 1600 0 0 0 0
>(subsys\win32k\dib\dib16bpp.c:231) -1120 -69 -69
>(subsys\win32k\dib\dib16bpp.c:232) 1600 0 0 0 0
>(subsys\win32k\dib\dib16bpp.c:231) -1120 0 13
>(subsys\win32k\dib\dib16bpp.c:232) 1600 69 69 629 87
>KeBugCheckWithTf at ntoskrnl\ke\catch.c:222
>A problem has been detected and ReactOS has been shut down to prevent
>damage to your computer.
>...
>
>I seems that win32k doesn't handle the negative values. I doesn't know
>what they mean.
>
>  
>
Have you tried having the code call KeRosDumpStackFrames() if it sees 
negative numbers?