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-rw-r--r--net/sched/sch_sfq.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index c787d4d46017..5a6def5e4e6d 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -637,6 +637,15 @@ static int sfq_change(struct Qdisc *sch, struct nlattr *opt)
if (ctl->divisor &&
(!is_power_of_2(ctl->divisor) || ctl->divisor > 65536))
return -EINVAL;
+
+ /* slot->allot is a short, make sure quantum is not too big. */
+ if (ctl->quantum) {
+ unsigned int scaled = SFQ_ALLOT_SIZE(ctl->quantum);
+
+ if (scaled <= 0 || scaled > SHRT_MAX)
+ return -EINVAL;
+ }
+
if (ctl_v1 && !red_check_params(ctl_v1->qth_min, ctl_v1->qth_max,
ctl_v1->Wlog))
return -EINVAL;