Index: linux-3.12.19-rt30/kernel/trace/latency_hist.c
===================================================================
--- linux-3.12.19-rt30.orig/kernel/trace/latency_hist.c
+++ linux-3.12.19-rt30/kernel/trace/latency_hist.c
@@ -313,6 +313,7 @@ static void *l_next(struct seq_file *m,
 
 	if (++*pos >= MAX_ENTRY_NUM) {
 		atomic_inc(&my_hist->hist_mode);
+		kfree(p);
 		return NULL;
 	}
 	*index_ptr = *pos;