Re: [PATCH v10 06/27] ima: Move arch_policy_entry into ima_namespace

Stefan Berger
2022-02-16T21:19:34Z

On 2/16/22 15:56, Mimi Zohar wrote:
> On Wed, 2022-02-16 at 15:48 -0500, Stefan Berger wrote:
>> On 2/16/22 11:39, Mimi Zohar wrote:
>>> On Tue, 2022-02-01 at 15:37 -0500, Stefan Berger wrote
>>>
>>> Let's update the patch description providing a bit more background
>>> info:
>>>
>>> The archictecture specific policy rules, currently defined for EFI and
>>> powerpc, require the kexec kernel image and kernel modules to be
>>> validly signed and measured, based on the system's secure boot and/or
>>> trusted boot mode and the IMA_ARCH_POLICY Kconfig option being enabled.
>>>
>>>> Move the arch_policy_entry pointer into ima_namespace.
>>> Perhaps include something about namespaces being allowed or not allowed
>>> to kexec a new kernel or load kernel modules.
>> Namespaces are not allowed to kexec but special-casing the init_ima_ns
>> in the code to handle namespaces differently makes it much harder to
>> read the code. I would avoid special-casing init_ima_ns as much as
>> possible and therefore I have moved the arch_policy_entry into the
>> ima_namespace.
> Please include this in the patch description, but re-write the last
> line in the 3rd person, like:
>
> To avoid special-casing init_ima_ns, as much as possible, move the
> arch_policy_entry into the ima_namespace.

I took the paragraph on the background as well as this sentence.

>
> thanks,
>
> Mimi
>
>