[RFC 09/20] ima: Only accept AUDIT rules for IMA non-init_ima_ns namespaces for now
From: Stefan Berger <stefanb@linux.ibm.com>
Date: 2021-11-30 16:08:11
Also in:
linux-security-module, lkml
Subsystem:
extended verification module (evm), integrity measurement architecture (ima), security subsystem, the rest · Maintainers:
Mimi Zohar, Roberto Sassu, Dmitry Kasatkin, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
Only accept AUDIT rules for non-init_ima_ns namespaces rejecting all rules that require support for measuring, appraisal, and hashing. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> --- security/integrity/ima/ima_policy.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 96e7d63167e8..02e96da2faff 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c@@ -1785,6 +1785,16 @@ static int ima_parse_rule(struct ima_namespace *ns, result = -EINVAL; break; } + + /* IMA namespace only accepts AUDIT rules */ + if (ns != &init_ima_ns) { + switch (entry->action) { + case MEASURE: + case APPRAISE: + case HASH: + result = -EINVAL; + } + } } if (!result && !ima_validate_rule(entry)) result = -EINVAL;
--
2.31.1