From: Toke Høiland-Jørgensen Date: Mon, 5 Sep 2022 19:21:36 +0000 (+0200) Subject: sch_sfb: Also store skb len before calling child enqueue X-Git-Tag: v6.6.17~6656^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2f09707d0c972120bf794cfe0f0c67e2c2ddb252;p=platform%2Fkernel%2Flinux-rpi.git sch_sfb: Also store skb len before calling child enqueue Cong Wang noticed that the previous fix for sch_sfb accessing the queued skb after enqueueing it to a child qdisc was incomplete: the SFB enqueue function was also calling qdisc_qstats_backlog_inc() after enqueue, which reads the pkt len from the skb cb field. Fix this by also storing the skb len, and using the stored value to increment the backlog after enqueueing. Fixes: 9efd23297cca ("sch_sfb: Don't assume the skb is still around after enqueueing to child") Signed-off-by: Toke Høiland-Jørgensen Acked-by: Cong Wang Link: https://lore.kernel.org/r/20220905192137.965549-1-toke@toke.dk Signed-off-by: Paolo Abeni --- diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c index 0d761f4..2829455 100644 --- a/net/sched/sch_sfb.c +++ b/net/sched/sch_sfb.c @@ -281,6 +281,7 @@ static int sfb_enqueue(struct sk_buff *skb, struct Qdisc *sch, { struct sfb_sched_data *q = qdisc_priv(sch); + unsigned int len = qdisc_pkt_len(skb); struct Qdisc *child = q->qdisc; struct tcf_proto *fl; struct sfb_skb_cb cb; @@ -403,7 +404,7 @@ enqueue: memcpy(&cb, sfb_skb_cb(skb), sizeof(cb)); ret = qdisc_enqueue(skb, child, to_free); if (likely(ret == NET_XMIT_SUCCESS)) { - qdisc_qstats_backlog_inc(sch, skb); + sch->qstats.backlog += len; sch->q.qlen++; increment_qlen(&cb, q); } else if (net_xmit_drop_count(ret)) {