Re: [PATCH v7 10/10] ipe: Add BPF program load policy enforcement via Hornet integration

[Paul Moore <paul@paul-moore.com>]

On May  7, 2026 Blaise Boscaccy <bboscaccy@linux.microsoft.com> wrote:
> 
> Add support for the bpf_prog_load_post_integrity LSM hook, enabling IPE
> to make policy decisions about BPF program loading based on integrity
> verdicts provided by the Hornet LSM.
> 
> New policy operation:
>   op=BPF_PROG_LOAD - Matches BPF program load events
> 
> New policy properties:
>   bpf_signature=NONE      - No Verdict
>   bpf_signature=OK        - Program signature and map hashes verified
>   bpf_signature=UNSIGNED  - No signature provided
>   bpf_signature=PARTIALSIG - Signature OK but no map hash data
>   bpf_signature=UNKNOWNKEY - The keyring requested by the user is invalid
>   bpf_signature=UNEXPECTED - An unexpected hash value was encountered
>   bpf_signature=FAULT 	   - System error during verification
>   bpf_signature=BADSIG    - Signature or map hash verification failed
>   bpf_keyring=BUILTIN     - Program was signed using a builtin keyring
>   bpf_keyring=SECONDARY   - Program was signed using the secondary keyring
>   bpf_keyring=PLATFORM    - Program was signed using the platform keyring
>   bpf_kernel=TRUE         - Program originated from kernelspace
>   bpf_kernel=FALSE        - Program originated from userspace
> 
> These properties map directly to the lsm_integrity_verdict enum values
> provided by the Hornet LSM through security_bpf_prog_load_post_integrity.
> 
> The feature is gated on CONFIG_IPE_PROP_BPF_SIGNATURE which depends on
> CONFIG_SECURITY_HORNET.
> 
> Signed-off-by: Blaise Boscaccy <bboscaccy@linux.microsoft.com>
> Acked-by: Fan Wu <wufan@kernel.org>
> ---
>  Documentation/admin-guide/LSM/ipe.rst | 162 +++++++++++++++++++++++++-
>  Documentation/security/ipe.rst        |  68 +++++++++++
>  security/ipe/Kconfig                  |  15 +++
>  security/ipe/audit.c                  |  15 +++
>  security/ipe/eval.c                   |  93 ++++++++++++++-
>  security/ipe/eval.h                   |  11 ++
>  security/ipe/hooks.c                  |  63 ++++++++++
>  security/ipe/hooks.h                  |  15 +++
>  security/ipe/ipe.c                    |  14 +++
>  security/ipe/ipe.h                    |   3 +
>  security/ipe/policy.h                 |  14 +++
>  security/ipe/policy_parser.c          |  27 +++++
>  12 files changed, 498 insertions(+), 2 deletions(-)

Merged into lsm/dev, thanks.

--
paul-moore.com