diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 912ed9b901ac..45038c837eab 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -393,7 +393,8 @@ struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
 {
 	struct qdisc_rate_table *rtab;
 
-	if (tab == NULL || r->rate == 0 || r->cell_log == 0 ||
+	if (tab == NULL || r->rate == 0 ||
+	    r->cell_log == 0 || r->cell_log >= 32 ||
 	    nla_len(tab) != TC_RTAB_SIZE)
 		return NULL;