diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 8b51e6a5b3869dcd63860d4b61e54267b21febae..d2b7c3b6ae2d0aa0627510fc8c5e73efae2db4e4 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -1209,7 +1209,7 @@ static void show_rcu_tasks_trace_gp_kthread(void)
 {
 	char buf[64];
 
-	sprintf(buf, "N%d h:%lu/%lu/%lu", atomic_read(&trc_n_readers_need_end),
+	snprintf(buf, sizeof(buf), "N%d h:%lu/%lu/%lu", atomic_read(&trc_n_readers_need_end),
 		data_race(n_heavy_reader_ofl_updates),
 		data_race(n_heavy_reader_updates),
 		data_race(n_heavy_reader_attempts));