Re: LockDIBSection problem

[Rein Klazes]

On 06 May 2005 16:01:06 +0200, you wrote:
> Rein Klazes  writes:
> > I managed to fixed it in two ways:
> > - put a 
> >  X11DRV_CoerceDIBSection( physDevDst, DIB_Status_InSync, FALSE );
> >
> > at the end of X11DRV_BitBlt. This probably defeats the whole purpose of
> > these protections so:
> > - Add a "IsBadReadPtr( buffer, bytesToWrite)" in the top of WriteFile
> >
> > to force an exception and everything works.
> >
> > Would that be an acceptable fix?
>
> We don't want that at the top of WriteFile, but it could be OK to add
> special handling of the INVALID_USER_BUFFER error, with a big FIXME
> comment...

Special handling: try again after an IsBadReadPtr call.

Changelog:

dlls/kernel	: file.c

Work around a problem where WriteFile is asked to write memory protected
by DIBSection code.

Rein.