net_sched: Bug in netem reordering
Not now, but it looks you are correct. q->qdisc is NULL until another
additional qdisc is attached (beside tfifo). See 50612537e9ab2969312.
The following patch should work.
From: Hagen Paul Pfeifer <hagen@jauu.net>
netem: catch NULL pointer by updating the real qdisc statistic
Reported-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 06a5ceb..e7e1d0b 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -458,8 +458,8 @@
q->counter = 0;
__skb_queue_head(&sch->q, skb);
- q->qdisc->qstats.backlog += qdisc_pkt_len(skb);
- q->qdisc->qstats.requeues++;
+ sch->qstats.backlog += qdisc_pkt_len(skb);
+ sch->qstats.requeues++;
ret = NET_XMIT_SUCCESS;
}