Re: Adding cmldine args measure to ima

Mimi Zohar
2019-03-22T20:36:34Z

On Fri, 2019-03-22 at 17:27 +0000, Prakhar Srivastava wrote:
> Hi,
>
> Currently Kexec (kexec_file_load) code path does not measure the cmdline
> arguments passed to the next kernel.The boot_aggregate won't change since
> the EFI loader hasn't been triggered. Attesting the same in K2 has no impact.
> Adding the cmdline measurement will add some attestable criteria.
>
> To account for the cmdline passed, we are looking at using IMA to measure and
> pass the buffer so that it can be attested.
>
> Do you have any alternate solutions/concerns with this approach?

I started looking at this a couple of years ago, but haven't had time.
I definitely don't have problems with extending IMA to measure the
boot command line.

Mimi