| From | Andy Lutomirski <> | Date | Tue, 26 Mar 2019 13:56:49 -0700 | Subject | Re: [PATCH V31 11/25] x86: Lock down IO port access when the kernel is locked down |
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On Tue, Mar 26, 2019 at 11:28 AM Matthew Garrett <matthewgarrett@google.com> wrote: > > From: Matthew Garrett <mjg59@srcf.ucam.org> > > 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. > > This also implicitly locks down the KDADDIO, KDDELIO, KDENABIO and > KDDISABIO console ioctls. >
Reviewed-by: Andy Lutomirski <luto@kernel.org>
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