ima: fix wrong signed policy requirement when not appraising

commit f4001947 upstream.

Kernel booted just with ima_policy=tcb (not with
ima_policy=appraise_tcb) shouldn't require signed policy.

Regression found with LTP test ima_policy.sh.

Fixes: c52657d9 ("ima: refactor ima_init_policy()")
Cc: stable@vger.kernel.org  (linux-5.0)
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

security/integrity/ima/ima_policy.c

@@ -498,10 +498,11 @@ static void add_rules(struct ima_rule_entry *entries, int count,
 
 			list_add_tail(&entry->list, &ima_policy_rules);
 		}
-		if (entries[i].action == APPRAISE)
+		if (entries[i].action == APPRAISE) {
 			temp_ima_appraise |= ima_appraise_flag(entries[i].func);
-		if (entries[i].func == POLICY_CHECK)
-			temp_ima_appraise |= IMA_APPRAISE_POLICY;
+			if (entries[i].func == POLICY_CHECK)
+				temp_ima_appraise |= IMA_APPRAISE_POLICY;
+		}
 	}
 }