On Fri, 2020-07-24 at 14:36 -0700, Kees Cook wrote:

v3:
- add reviews/acks
- add "IMA: Add support for file reads without contents" patch
- trim CC list, in case that's why vger ignored v2
v2: [missing from lkml archives! (CC list too long?) repeating changes here]
- fix issues in firmware test suite
- add firmware partial read patches
- various bug fixes/cleanups
v1: https://lore.kernel.org/lkml/20200717174309.1164575-1-keescook@chromium.org/ (local)

Hi,

Here's my tree for adding partial read support in kernel_read_file(),
which fixes a number of issues along the way. It's got Scott's firmware
and IMA patches ported and everything tests cleanly for me (even with
CONFIG_IMA_APPRAISE=y).

Thanks, Kees.  Other than my comments on the new
security_kernel_post_load_data() hook, the patch set is really nice.

In addition to compiling with CONFIG_IMA_APPRAISE enabled, have you
booted the kernel with the ima_policy=tcb?  The tcb policy will add
measurements to the IMA measurement list and extend the TPM with the
file or buffer data digest.  Are you seeing the firmware measurements,
in particular the partial read measurement?

thanks,

Mimi