diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 9425c96..accfd7bf 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1831,7 +1831,7 @@
 
 		size = n * sizeof(u64);
 
-		if (copy_to_user(buf + size, values, size)) {
+		if (copy_to_user(buf + ret, values, size)) {
 			ret = -EFAULT;
 			goto unlock;
 		}