Re: [PATCH V31 10/25] PCI: Lock down BAR access when the kernel is locked down
From: Alex Williamson <hidden>
Date: 2019-03-26 21:19:07
Also in:
linux-pci, linux-security-module, lkml
On Tue, 26 Mar 2019 13:55:39 -0700 Andy Lutomirski [off-list ref] wrote:
On Tue, Mar 26, 2019 at 11:28 AM Matthew Garrett [off-list ref] wrote:quoted
From: Matthew Garrett <mjg59@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, Alex