From: Jakub Kicinski jakub.kicinski@netronome.com
[ Upstream commit e0ad032e144731a5928f2d75e91c2064ba1a764c ]
If packet corruption failed we jump to finish_segs and return NET_XMIT_SUCCESS. Seeing success will make the parent qdisc increment its backlog, that's incorrect - we need to return NET_XMIT_DROP.
Fixes: 6071bd1aa13e ("netem: Segment GSO packets on enqueue") Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Reviewed-by: Simon Horman simon.horman@netronome.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- net/sched/sch_netem.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index 7660aa5..014a28d 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -607,6 +607,8 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch, } /* Parent qdiscs accounted for 1 skb of size @prev_len */ qdisc_tree_reduce_backlog(sch, -(nb - 1), -(len - prev_len)); + } else if (!skb) { + return NET_XMIT_DROP; } return NET_XMIT_SUCCESS; }