Re: [dm-devel] [RFC PATCH v5 00/11] Integrity Policy Enforcement LSM (IPE)
On Sat, 8 Aug 2020, Chuck Lever wrote:
My interest is in code integrity enforcement for executables stored
in NFS files.
My struggle with IPE is that due to its dependence on dm-verity, it
does not seem to able to protect content that is stored separately
from its execution environment and accessed via a file access
protocol (FUSE, SMB, NFS, etc).
It's not dependent on DM-Verity, that's just one possible integrity
verification mechanism, and one of two supported in this initial
version. The other is 'boot_verified' for a verified or otherwise trusted
rootfs. Future versions will support FS-Verity, at least.
IPE was designed to be extensible in this way, with a strong separation of
mechanism and policy.
Whatever is implemented for NFS should be able to plug in to IPE pretty
easily.
--
James Morris
<jmorris(a)namei.org>