Merge tag 'ipe-pr-20250527' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe

Pull IPE update from Fan Wu:
 "A single commit from Jasjiv Singh, that adds an errno field to IPE
  policy load auditing to log failures with error details, not just
  successes.

  This improves the security audit trail and helps diagnose policy
  deployment issues"

* tag 'ipe-pr-20250527' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe:
  ipe: add errno field to IPE policy load auditing

1 files changed, 50 insertions, 19 deletions

diff --git a/Documentation/admin-guide/LSM/ipe.rst b/Documentation/admin-guide/LSM/ipe.rst
index f93a467db628..dc7088451f9d 100644
--- a/Documentation/admin-guide/LSM/ipe.rst
+++ b/Documentation/admin-guide/LSM/ipe.rst
@@ -423,7 +423,7 @@ Field descriptions:
 
 Event Example::
 
-   type=1422 audit(1653425529.927:53): policy_name="boot_verified" policy_version=0.0.0 policy_digest=sha256:820EEA5B40CA42B51F68962354BA083122A20BB846F26765076DD8EED7B8F4DB auid=4294967295 ses=4294967295 lsm=ipe res=1
+   type=1422 audit(1653425529.927:53): policy_name="boot_verified" policy_version=0.0.0 policy_digest=sha256:820EEA5B40CA42B51F68962354BA083122A20BB846F26765076DD8EED7B8F4DB auid=4294967295 ses=4294967295 lsm=ipe res=1 errno=0
    type=1300 audit(1653425529.927:53): arch=c000003e syscall=1 success=yes exit=2567 a0=3 a1=5596fcae1fb0 a2=a07 a3=2 items=0 ppid=184 pid=229 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=4294967295 comm="python3" exe="/usr/bin/python3.10" key=(null)
    type=1327 audit(1653425529.927:53): PROCTITLE proctitle=707974686F6E3300746573742F6D61696E2E7079002D66002E2E
 
@@ -433,24 +433,55 @@ This record will always be emitted in conjunction with a ``AUDITSYSCALL`` record
 
 Field descriptions:
 
-+----------------+------------+-----------+---------------------------------------------------+
-| Field          | Value Type | Optional? | Description of Value                              |
-+================+============+===========+===================================================+
-| policy_name    | string     | No        | The policy_name                                   |
-+----------------+------------+-----------+---------------------------------------------------+
-| policy_version | string     | No        | The policy_version                                |
-+----------------+------------+-----------+---------------------------------------------------+
-| policy_digest  | string     | No        | The policy hash                                   |
-+----------------+------------+-----------+---------------------------------------------------+
-| auid           | integer    | No        | The login user ID                                 |
-+----------------+------------+-----------+---------------------------------------------------+
-| ses            | integer    | No        | The login session ID                              |
-+----------------+------------+-----------+---------------------------------------------------+
-| lsm            | string     | No        | The lsm name associated with the event            |
-+----------------+------------+-----------+---------------------------------------------------+
-| res            | integer    | No        | The result of the audited operation(success/fail) |
-+----------------+------------+-----------+---------------------------------------------------+
-
++----------------+------------+-----------+-------------------------------------------------------------+
+| Field          | Value Type | Optional? | Description of Value                                        |
++================+============+===========+=============================================================+
+| policy_name    | string     | Yes       | The policy_name                                             |
++----------------+------------+-----------+-------------------------------------------------------------+
+| policy_version | string     | Yes       | The policy_version                                          |
++----------------+------------+-----------+-------------------------------------------------------------+
+| policy_digest  | string     | Yes       | The policy hash                                             |
++----------------+------------+-----------+-------------------------------------------------------------+
+| auid           | integer    | No        | The login user ID                                           |
++----------------+------------+-----------+-------------------------------------------------------------+
+| ses            | integer    | No        | The login session ID                                        |
++----------------+------------+-----------+-------------------------------------------------------------+
+| lsm            | string     | No        | The lsm name associated with the event                      |
++----------------+------------+-----------+-------------------------------------------------------------+
+| res            | integer    | No        | The result of the audited operation(success/fail)           |
++----------------+------------+-----------+-------------------------------------------------------------+
+| errno          | integer    | No        | Error code from policy loading operations (see table below) |
++----------------+------------+-----------+-------------------------------------------------------------+
+
+Policy error codes (errno):
+
+The following table lists the error codes that may appear in the errno field while loading or updating the policy:
+
++----------------+--------------------------------------------------------+
+| Error Code     | Description                                            |
++================+========================================================+
+| 0              | Success                                                |
++----------------+--------------------------------------------------------+
+| -EPERM         | Insufficient permission                                |
++----------------+--------------------------------------------------------+
+| -EEXIST        | Same name policy already deployed                      |
++----------------+--------------------------------------------------------+
+| -EBADMSG       | Policy is invalid                                      |
++----------------+--------------------------------------------------------+
+| -ENOMEM        | Out of memory (OOM)                                    |
++----------------+--------------------------------------------------------+
+| -ERANGE        | Policy version number overflow                         |
++----------------+--------------------------------------------------------+
+| -EINVAL        | Policy version parsing error                           |
++----------------+--------------------------------------------------------+
+| -ENOKEY        | Key used to sign the IPE policy not found in keyring   |
++----------------+--------------------------------------------------------+
+| -EKEYREJECTED  | Policy signature verification failed                   |
++----------------+--------------------------------------------------------+
+| -ESTALE        | Attempting to update an IPE policy with older version  |
++----------------+--------------------------------------------------------+
+| -ENOENT        | Policy was deleted while updating                      |
++----------------+--------------------------------------------------------+
 
 1404 AUDIT_MAC_STATUS
 ^^^^^^^^^^^^^^^^^^^^^