1 files changed, 8 insertions, 2 deletions

diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index 9b05924cc386..333cd94ba381 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -670,8 +670,14 @@ static int fq_change(struct Qdisc *sch, struct nlattr *opt)
         if (tb[TCA_FQ_FLOW_PLIMIT])
                 q->flow_plimit = nla_get_u32(tb[TCA_FQ_FLOW_PLIMIT]);
 
-        if (tb[TCA_FQ_QUANTUM])
-                q->quantum = nla_get_u32(tb[TCA_FQ_QUANTUM]);
+        if (tb[TCA_FQ_QUANTUM]) {
+                u32 quantum = nla_get_u32(tb[TCA_FQ_QUANTUM]);
+
+                if (quantum > 0)
+                        q->quantum = quantum;
+                else
+                        err = -EINVAL;
+        }
 
         if (tb[TCA_FQ_INITIAL_QUANTUM])
                 q->initial_quantum = nla_get_u32(tb[TCA_FQ_INITIAL_QUANTUM]);