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.

quoted

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.

    Stefan

thanks,

Mimi

quoted

When freeing the memory set the pointer to NULL.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>