On 03/18/2013 02:32 PM, Matthew Garrett wrote: > IO port access would permit users to gain access to PCI configuration > registers, which in turn (on a lot of hardware) give access to MMIO register > space. This would potentially permit root to trigger arbitrary DMA, so lock > it down by default. > Again, if you are going to do this, just kill bloody RAWIO. Quite frankly saying brainfucked SCSI drivers have abused it doesn't hold water, because as far as you know those same commands can trigger arbitrary DMA activity. -hpa
