[PATCH v3 5/5] Audit: Add record for multiple object contexts

[Paul Moore]

On Mar 19, 2025 Casey Schaufler <casey at schaufler-ca.com> wrote:
> 
> Create a new audit record AUDIT_MAC_OBJ_CONTEXTS.
> An example of the MAC_OBJ_CONTEXTS (1424) record is:
> 
>     type=MAC_OBJ_CONTEXTS[1424]
>     msg=audit(1601152467.009:1050):
>     obj_selinux=unconfined_u:object_r:user_home_t:s0
> 
> When an audit event includes a AUDIT_MAC_OBJ_CONTEXTS record
> the "obj=" field in other records in the event will be "obj=?".
> An AUDIT_MAC_OBJ_CONTEXTS record is supplied when the system has
> multiple security modules that may make access decisions based
> on an object security context.
> 
> Signed-off-by: Casey Schaufler <casey at schaufler-ca.com>
> ---
>  include/linux/audit.h      |  6 +++++
>  include/uapi/linux/audit.h |  1 +
>  kernel/audit.c             | 51 +++++++++++++++++++++++++++++++++++++-
>  kernel/auditsc.c           | 45 ++++++++-------------------------
>  4 files changed, 68 insertions(+), 35 deletions(-)

Similar to patch 4/5, this looks fine modulo the obj count changes.

Related, you changed to a single subj/obj count in v3, is it no longer
important to distinguish between the two?

--
paul-moore.com