kmemleak: Do not report new leaked objects if the scanning was stopped

If the scanning was stopped with a signal, it is possible that some
objects are left with a white colour (potential leaks) and reported. Add
a check to avoid reporting such objects.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

mm/kmemleak.c

@@ -1029,6 +1029,12 @@ static void kmemleak_scan(void)
 	}
 	WARN_ON(!list_empty(&gray_list));
 
+	/*
+	 * If scanning was stopped do not report any new unreferenced objects.
+	 */
+	if (scan_should_stop())
+		return;
+
 	/*
 	 * Scanning result reporting.
 	 */
@@ -1184,11 +1190,10 @@ static int kmemleak_seq_show(struct seq_file *seq, void *v)
 	unsigned long flags;
 
 	spin_lock_irqsave(&object->lock, flags);
-	if (!unreferenced_object(object))
-		goto out;
-	print_unreferenced(seq, object);
-	reported_leaks++;
-out:
+	if ((object->flags & OBJECT_REPORTED) && unreferenced_object(object)) {
+		print_unreferenced(seq, object);
+		reported_leaks++;
+	}
 	spin_unlock_irqrestore(&object->lock, flags);
 	return 0;
 }