linux-kernel - [PATCH v5 08/10] IMA: Added a flag to determine whether IMA hook can process the key now or has to queue for processing later

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Date:   Mon, 11 Nov 2019 11:33:01 -0800
From:   Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
To:     zohar@...ux.ibm.com, dhowells@...hat.com,
        matthewgarrett@...gle.com, sashal@...nel.org,
        jamorris@...ux.microsoft.com, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 08/10] IMA: Added a flag to determine whether IMA hook can process the key now or has to queue for processing later

Keys should be processed only if custom IMA policies have been
applied. Prior to that the keys should be queued for processing later.

This patch defines a flag namely ima_process_keys_for_measurement
to check if the key should be processed immediately or should be queued.

ima_policy_flag cannot be relied upon because ima_policy_flag will
be set to 0 when either IMA is not initialized or the IMA policy
itself is empty.

Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
---
 security/integrity/ima/ima_asymmetric_keys.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/integrity/ima/ima_asymmetric_keys.c b/security/integrity/ima/ima_asymmetric_keys.c
index 7d6603bfcc06..61c42d06a636 100644
--- a/security/integrity/ima/ima_asymmetric_keys.c
+++ b/security/integrity/ima/ima_asymmetric_keys.c
@@ -15,6 +15,8 @@
 #include <keys/asymmetric-type.h>
 #include "ima.h"
 
+bool ima_process_keys_for_measurement;
+
 /**
  * ima_post_key_create_or_update - measure asymmetric keys
  * @keyring: keyring to which the key is linked to
-- 
2.17.1