[PATCH v14 00/26] ima: Namespace IMA with audit support in IMA-ns

Casey Schaufler casey at schaufler-ca.com
Fri Sep 16 00:56:32 UTC 2022


On 9/15/2022 12:31 PM, Stefan Berger wrote:
> The goal of this series of patches is to start with the namespacing of
> IMA and support auditing within an IMA namespace (IMA-ns) as the first
> step.
>
> In this series the IMA namespace is piggybacking on the user namespace
> and therefore an IMA namespace is created when a user namespace is
> created, although this is done late when SecurityFS is mounted inside
> a user namespace. The advantage of piggybacking on the user namespace
> is that the user namespace can provide the keys infrastructure that IMA
> appraisal support will need later on.
>
> We chose the goal of supporting auditing within an IMA namespace since it
> requires the least changes to IMA. Following this series, auditing within
> an IMA namespace can be activated by a root running the following lines
> that rely on a statically linked busybox to be installed on the host for
> execution within the minimal container environment:
>
> As root (since audit rules may now only be set by root):

How about calling out the required capabilities? You don't need
to be root, you need a specific set of capabilities. It would be
very useful for the purposes of understanding the security value
of the patch set to know this.



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