[PATCH V31 10/25] PCI: Lock down BAR access when the kernel is locked down
alex.williamson at redhat.com
Tue Mar 26 21:19:03 UTC 2019
On Tue, 26 Mar 2019 13:55:39 -0700
Andy Lutomirski <luto at kernel.org> wrote:
> On Tue, Mar 26, 2019 at 11:28 AM Matthew Garrett
> <matthewgarrett at google.com> wrote:
> > From: Matthew Garrett <mjg59 at srcf.ucam.org>
> > Any hardware that can potentially generate DMA has to be locked down in
> > order to avoid it being possible for an attacker to modify kernel code,
> > allowing them to circumvent disabled module loading or module signing.
> > Default to paranoid - in future we can potentially relax this for
> > sufficiently IOMMU-isolated devices.
> Does this break vfio?
No, vfio provides its own interface to pci config space. Thanks,
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