| Date | Wed, 04 Sep 2013 20:52:08 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH V3 03/11] x86: Lock down IO port access when module security is enabled |
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On 09/03/2013 04:50 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. > > Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Seriously... just deny CAP_SYS_RAWIO to any system in secure mode.
-hpa
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