[Intel-gfx] drm-next xf86-video-vmware breakage Was [PATCH 02/10] drm/uapi: Validate the mode flags/type

[Ville Syrjälä]

On Wed, Mar 21, 2018 at 09:45:09PM +0100, Thomas Hellstrom wrote:
> Hi, Ville,
> 
> On 11/14/2017 07:32 PM, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > Currently userspace is allowed to feed in any king of garbage in the
> > high bits of the mode flags/type, as are drivers when probing modes.
> > Reject any mode with bogus flags/type.
> >
> > Hopefully this won't break any current userspace...
> 
> Unfortunately this breaks xf86-video-vmware which currently leaves the 
> mode->type uninitialized :(.
> That code is inherited from the old gallium xorg state tracker. I don't 
> know whether it has spread elsewhere but the symptoms are that the X 
> server frequently dies failing to set screen resources, a very 
> uninformative error.
> 
> I'll fix the xf86-video-vmware driver, but I guess we need to back out 
> the mode->type check.

Dang. So the flags check is fine but type check is not?

-- 
Ville Syrjälä
Intel OTC