audit: bail before bug check if audit disabled

If audit is disabled, who cares if there is a bug indicating syscall in
process or names already recorded.  Bail immediately on audit disabled.
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

kernel/auditsc.c

@@ -1511,14 +1511,11 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
 	struct audit_context *context = tsk->audit_context;
 	enum audit_state     state;
 
-	if (!context)
+	if (!audit_enabled || !context)
 		return;
 
 	BUG_ON(context->in_syscall || context->name_count);
 
-	if (!audit_enabled)
-		return;
-
 	state = context->state;
 	if (state == AUDIT_DISABLED)
 		return;