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8

I've performed a few experiments on Linux and various GPUs and drivers. I took a basic OpenGL tutorial for texture mapping and replaced the pointer to the texture data in the call to glTexImage2D with a null pointer. With the nouveau driver on an Nvidia GPU, the results were pretty interesting: The text on the cube seems to contain the previous contents of ...


4

If you want to use virtual machine as a sandbox mechanism to contain potentially hostile software, then indeed all the kinds of shortcuts you talk about are a source of worry. However, note that these "enablers" all apply to desktop-related virtualization. Most users of virtualization on their desktop systems do not do that for security, but for ...


3

For proper security, graphic cards must be treated like all other sorts of hardware which have access to RAM: they must come under the umbrella of the MMU and the kernel-controlled scheduler, so that simultaneously executing tasks cannot impact each other, and may interact only through communication channels carefully managed by the kernel. As you note, ...


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