Revert "ima: Add ima policy related data to the ima namespace"

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4O25G
CVE: NA

--------------------------------

This reverts commit 3c759877.
Signed-off-by: NZhang Tianxing <zhangtianxing3@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Acked-by: Xiu Jianfeng<xiujianfeng@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

include/linux/ima.h

@@ -17,7 +17,6 @@ struct nsproxy;
 struct task_struct;
 struct list_head;
 struct llist_node;
-struct ima_policy_data;
 
 #ifdef CONFIG_IMA
 extern int ima_bprm_check(struct linux_binprm *bprm);
@@ -219,7 +218,6 @@ struct ima_namespace {
 	struct llist_node cleanup_list; /* namespaces on a death row */
 	atomic_t inactive; /* set only when ns is added to the cleanup list */
 	bool frozen;
-	struct ima_policy_data *policy_data;
 } __randomize_layout;
 
 extern struct ima_namespace init_ima_ns;

security/integrity/ima/ima.h

@@ -63,14 +63,6 @@ extern int ima_digest_db_max_size __ro_after_init;
 extern int ima_digest_db_size;
 #endif
 
-/* IMA policy setup data */
-struct ima_policy_setup_data {
-	int ima_policy;
-	int ima_appraise;
-	bool ima_use_secure_boot;
-	bool ima_use_appraise_tcb;
-};
-
 /* IMA event related data */
 struct ima_event_data {
 	struct integrity_iint_cache *iint;
@@ -299,8 +291,6 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid,
 		     struct ima_template_desc **template_desc,
 		     const char *keyring);
 void ima_init_policy(void);
-void ima_init_ns_policy(struct ima_namespace *ima_ns,
-			const struct ima_policy_setup_data *policy_setup_data);
 void ima_update_policy(void);
 void ima_update_policy_flag(void);
 ssize_t ima_parse_add_rule(char *);
@@ -373,20 +363,6 @@ static inline enum integrity_status ima_get_cache_status(struct integrity_iint_c
 
 #endif /* CONFIG_IMA_APPRAISE */
 
-struct ima_policy_data {
-	struct list_head ima_default_rules;
-	struct list_head ima_policy_rules;
-	struct list_head ima_temp_rules;
-	struct list_head *ima_rules;
-	bool ima_fail_unverifiable_sigs;
-	int ima_policy_flag; /* current content of the policy */
-	int ima_appraise;
-	int temp_ima_appraise;
-};
-
-extern struct ima_policy_data init_policy_data;
-extern struct ima_policy_setup_data init_policy_setup_data;
-
 extern struct list_head ima_ns_list;
 extern struct rw_semaphore ima_ns_list_lock;
 

security/integrity/ima/ima_init.c

@@ -32,8 +32,7 @@ struct ima_namespace init_ima_ns = {
 #ifdef CONFIG_IMA_NS
 	.ns.ops = &imans_operations,
 #endif
-	.frozen = true,
-	.policy_data = &init_policy_data,
+	.frozen = true
 };
 EXPORT_SYMBOL(init_ima_ns);
 

security/integrity/ima/ima_ns.c

@@ -51,38 +51,9 @@ static struct ima_namespace *ima_ns_alloc(void)
 
 	ima_ns = kzalloc(sizeof(*ima_ns), GFP_KERNEL);
 	if (!ima_ns)
-		goto out;
-
-	ima_ns->policy_data = kzalloc(sizeof(struct ima_policy_data),
-				      GFP_KERNEL);
-	if (!ima_ns->policy_data)
-		goto out_free;
+		return NULL;
 
 	return ima_ns;
-
-out_free:
-	kfree(ima_ns);
-out:
-	return NULL;
-}
-
-static void ima_set_ns_policy(struct ima_namespace *ima_ns,
-			      char *policy_setup_str)
-{
-	struct ima_policy_setup_data setup_data;
-
-#ifdef CONFIG_IMA_APPRAISE
-	setup_data.ima_appraise = IMA_APPRAISE_ENFORCE;
-#endif
-	/* Configuring IMA namespace will be implemented in the following
-	 * patches. When it is done, parse configuration string and store result
-	 * in setup_data. Temporarily use init_policy_setup_data.
-	 */
-	setup_data = init_policy_setup_data;
-	ima_ns->policy_data->ima_fail_unverifiable_sigs =
-		init_ima_ns.policy_data->ima_fail_unverifiable_sigs;
-
-	ima_init_ns_policy(ima_ns, &setup_data);
 }
 
 /**
@@ -93,7 +64,7 @@ static void ima_set_ns_policy(struct ima_namespace *ima_ns,
  * Return:	ERR_PTR(-ENOMEM) on error (failure to kmalloc), new ns otherwise
  */
 static struct ima_namespace *clone_ima_ns(struct user_namespace *user_ns,
-					  struct ima_namespace *old_ns)
+					   struct ima_namespace *old_ns)
 {
 	struct ima_namespace *ns;
 	struct ucounts *ucounts;
@@ -120,14 +91,9 @@ static struct ima_namespace *clone_ima_ns(struct user_namespace *user_ns,
 	ns->ucounts = ucounts;
 	ns->frozen = false;
 
-	INIT_LIST_HEAD(&ns->policy_data->ima_default_rules);
-	INIT_LIST_HEAD(&ns->policy_data->ima_policy_rules);
-	INIT_LIST_HEAD(&ns->policy_data->ima_temp_rules);
-
 	return ns;
 
 fail_free:
-	kfree(ns->policy_data);
 	kfree(ns);
 fail_dec:
 	dec_ima_namespaces(ucounts);
@@ -173,7 +139,6 @@ static void destroy_ima_ns(struct ima_namespace *ns)
 	dec_ima_namespaces(ns->ucounts);
 	put_user_ns(ns->user_ns);
 	ns_free_inum(&ns->ns);
-	kfree(ns->policy_data);
 	kfree(ns);
 }
 
@@ -273,8 +238,6 @@ static int imans_activate(struct ima_namespace *ima_ns)
 	if (ima_ns->frozen)
 		goto out;
 
-	ima_set_ns_policy(ima_ns, NULL);
-
 	ima_ns->frozen = true;
 
 	down_write(&ima_ns_list_lock);

security/integrity/ima/ima_policy.c

@@ -235,17 +235,6 @@ static struct list_head *ima_rules = &ima_default_rules;
 
 static int ima_policy __initdata;
 
-struct ima_policy_setup_data init_policy_setup_data = {
-#ifdef CONFIG_IMA_APPRAISE
-	.ima_appraise = IMA_APPRAISE_ENFORCE,
-#endif
-};
-struct ima_policy_data init_policy_data = {
-	.ima_default_rules = LIST_HEAD_INIT(init_policy_data.ima_default_rules),
-	.ima_policy_rules = LIST_HEAD_INIT(init_policy_data.ima_policy_rules),
-	.ima_temp_rules = LIST_HEAD_INIT(init_policy_data.ima_temp_rules),
-};
-
 static int __init default_measure_policy_setup(char *str)
 {
 	if (ima_policy)
@@ -850,21 +839,6 @@ static int __init ima_init_arch_policy(void)
 	return i;
 }
 
-/**
- * ima_init_ns_policy - initialize the default measure rules.
- * @ima_ns: pointer to the namespace whose rules are being initialized
- * @setup_data: pointer to the policy setup data
- */
-void ima_init_ns_policy(struct ima_namespace *ima_ns,
-			const struct ima_policy_setup_data *setup_data)
-{
-	/* Set policy rules to the empty set of default rules. The rest will be
-	 * implemented after namespacing policy.
-	 */
-	ima_ns->policy_data->ima_rules =
-		&ima_ns->policy_data->ima_default_rules;
-}
-
 /**
  * ima_init_policy - initialize the default measure rules.
  *