ima: use static const char array definitions

A const char pointer allocates memory for a pointer as well as for
a string,  This patch replaces a number of the const char pointers
throughout IMA, with a static const char array.
Suggested-by: David Howells <dhowells@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>

security/integrity/ima/ima_api.c

@@ -92,8 +92,8 @@ int ima_store_template(struct ima_template_entry *entry,
 		       int violation, struct inode *inode,
 		       const unsigned char *filename)
 {
-	const char *op = "add_template_measure";
-	const char *audit_cause = "hashing_error";
+	static const char op[] = "add_template_measure";
+	static const char audit_cause[] = "hashing_error";
 	char *template_name = entry->template_desc->name;
 	int result;
 	struct {
@@ -260,8 +260,8 @@ void ima_store_measurement(struct integrity_iint_cache *iint,
 			   struct evm_ima_xattr_data *xattr_value,
 			   int xattr_len)
 {
-	const char *op = "add_template_measure";
-	const char *audit_cause = "ENOMEM";
+	static const char op[] = "add_template_measure";
+	static const char audit_cause[] = "ENOMEM";
 	int result = -ENOMEM;
 	struct inode *inode = file_inode(file);
 	struct ima_template_entry *entry;

security/integrity/ima/ima_appraise.c

@@ -177,11 +177,11 @@ int ima_appraise_measurement(int func, struct integrity_iint_cache *iint,
 			     struct evm_ima_xattr_data *xattr_value,
 			     int xattr_len)
 {
+	static const char op[] = "appraise_data";
+	char *cause = "unknown";
 	struct dentry *dentry = file->f_dentry;
 	struct inode *inode = dentry->d_inode;
 	enum integrity_status status = INTEGRITY_UNKNOWN;
-	const char *op = "appraise_data";
-	char *cause = "unknown";
 	int rc = xattr_len, hash_start = 0;
 
 	if (!ima_appraise)

security/integrity/ima/ima_init.c

@@ -42,10 +42,10 @@ int ima_used_chip;
  */
 static void __init ima_add_boot_aggregate(void)
 {
+	static const char op[] = "add_boot_aggregate";
+	const char *audit_cause = "ENOMEM";
 	struct ima_template_entry *entry;
 	struct integrity_iint_cache tmp_iint, *iint = &tmp_iint;
-	const char *op = "add_boot_aggregate";
-	const char *audit_cause = "ENOMEM";
 	int result = -ENOMEM;
 	int violation = 0;
 	struct {

security/integrity/ima/ima_policy.c

@@ -329,7 +329,7 @@ void __init ima_init_policy(void)
  */
 void ima_update_policy(void)
 {
-	const char *op = "policy_update";
+	static const char op[] = "policy_update";
 	const char *cause = "already exists";
 	int result = 1;
 	int audit_info = 0;
@@ -645,7 +645,7 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
  */
 ssize_t ima_parse_add_rule(char *rule)
 {
-	const char *op = "update_policy";
+	static const char op[] = "update_policy";
 	char *p;
 	struct ima_rule_entry *entry;
 	ssize_t result, len;