Messages in this thread Patch in this message | | | From | Stefan Berger <> | Subject | [PATCH v15 12/26] ima: Only accept AUDIT rules for non-init_ima_ns namespaces for now | Date | Mon, 6 Feb 2023 09:02:39 -0500 |
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For non-init_ima_ns namespaces, only accept AUDIT rules for now. Reject all rules that require support for measuring, appraisal, and hashing.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Acked-by: Christian Brauner <brauner@kernel.org> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
--- v9: - Jump to err_audit when unsupported rules are detected --- security/integrity/ima/ima_policy.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 19aca18db323..2a2c88f7d135 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -1912,6 +1912,17 @@ static int ima_parse_rule(struct ima_namespace *ns, result = -EINVAL; break; } + + /* IMA namespace only accepts AUDIT rules */ + if (ns != &init_ima_ns && result == 0) { + switch (entry->action) { + case MEASURE: + case APPRAISE: + case HASH: + result = -EINVAL; + goto err_audit; + } + } } if (!result && !ima_validate_rule(entry)) result = -EINVAL; @@ -1933,6 +1944,7 @@ static int ima_parse_rule(struct ima_namespace *ns, "verity rules should include d-ngv2"); } +err_audit: audit_log_format(ab, "res=%d", !result); audit_log_end(ab); return result; -- 2.37.3
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