[LTP] [PATCH 2/3] ima_setup.sh: Allow to load predefined policy

[Mimi Zohar]

On Tue, 2024-11-26 at 18:38 +0100, Petr Vorel wrote:
> environment variable LTP_IMA_LOAD_POLICY=1 tries to load example policy
> if available. This should be used only if tooling running LTP tests
> allows to reboot afterwards (because policy may be writable only once,
> e.g. missing CONFIG_IMA_WRITE_POLICY=y, or policies can influence each
> other).

Thanks, Petr.  Allowing the policy to be updated only if permitted is a good
idea.  Even with the LTP_IMA_LOAD_POLICY=1 environment variable, the policy
might not be loaded.  For example, when secure boot is enabled and the kernel is
configured with CONFIG_IMA_ARCH_POLICY enabled, an "appraise func=POLICY_CHECK
appraise_type=imasig" rule is loaded, requiring the IMA policy itself to be
signed.

On failure to load a policy, the ima_conditionals.sh and ima_policy.sh tests say
"TINFO: SELinux enabled in enforcing mode, this may affect test results".  We
should stop blaming SELinux. :)

thanks,

Mimi