> Is it just so that buggy drivers/hardware don't cause so much trouble? Yes, it's intended to reduce the impact of buggy drivers. A driver itself could have a

> Is it just so that buggy drivers/hardware don't cause so much trouble? Yes, it's intended to reduce the impact of buggy drivers. A driver itself could have a transient bug that corrupts kernel memory of some other subsystem. Or an attacker can trick a vulnerable driver into performing a DMA transaction to a sensitive area of memory.