Patches Arrive For DRM2 Render Nodes Support
Taking a brief break from his direct work on Wayland, Kristian Høgsberg has published his "Render Nodes" work for DRM2 following the recent DRM2 proposal.
There was a DRM2 proposal at XDC2012 earlier this month to increase the Direct Rendering Manager security.
Kristian explains in his mailing list patch series:
The core problem is that DRM security is compromised in the face of VT switching and multiple DRM masters. Any local user can access all shared buffers from within any X server on the system, even when that user doesn't have access to any of those X servers.The DRM render nodes patches amount to just a few dozen lines of code across three patches. With the current patches from Kristian, render nodes support is only implemented in the Intel DRM and not within Radeon, Nouveau, or other drivers.
A while back there was also other render node work being done by David Airlie.
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