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Subject[PATCH 2/4] ima: add support for external setting of ima_appraise
Date
From: Nayna Jain <nayna@linux.vnet.ibm.com>

The "ima_appraise" mode defaults to enforcing, unless configured to
allow the boot command line "ima_appraise" option. This patch allows
the "ima_appraise" mode to be defined based on the arch setting.

Signed-off-by: Nayna Jain <nayna@linux.vnet.ibm.com>
---
security/integrity/ima/ima.h | 5 +++++
security/integrity/ima/ima_appraise.c | 11 +++++++++--
security/integrity/ima/ima_policy.c | 5 ++++-
3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 588e4813370..6e5fa7c4280 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -248,6 +248,7 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
int xattr_len);
int ima_read_xattr(struct dentry *dentry,
struct evm_ima_xattr_data **xattr_value);
+void set_ima_appraise(char *str);

#else
static inline int ima_appraise_measurement(enum ima_hooks func,
@@ -290,6 +291,10 @@ static inline int ima_read_xattr(struct dentry *dentry,
return 0;
}

+static inline void set_ima_appraise(char *str)
+{
+}
+
#endif /* CONFIG_IMA_APPRAISE */

/* LSM based policy rules require audit */
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 8bd7a0733e5..e061613bcb8 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -18,15 +18,22 @@

#include "ima.h"

-static int __init default_appraise_setup(char *str)
+void set_ima_appraise(char *str)
{
-#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
if (strncmp(str, "off", 3) == 0)
ima_appraise = 0;
else if (strncmp(str, "log", 3) == 0)
ima_appraise = IMA_APPRAISE_LOG;
else if (strncmp(str, "fix", 3) == 0)
ima_appraise = IMA_APPRAISE_FIX;
+ else if (strncmp(str, "enforce", 7) == 0)
+ ima_appraise = IMA_APPRAISE_ENFORCE;
+}
+
+static int __init default_appraise_setup(char *str)
+{
+#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
+ set_ima_appraise(str);
#endif
return 1;
}
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index b47db4d7fea..402e5bd1093 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -573,8 +573,11 @@ void __init ima_init_policy(void)
* (Highest priority)
*/
arch_policy_entries = ima_init_arch_policy();
- if (arch_policy_entries > 0)
+ if (arch_policy_entries > 0) {
pr_info("Adding %d architecture policy rules.\n", arch_policy_entries);
+ set_ima_appraise("enforce");
+ }
+
for (i = 0; i < arch_policy_entries; i++) {
struct ima_rule_entry *entry;

--
2.14.4
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