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net: netem: correct the parent's backlog when corrupted packet was dropped

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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: 6071bd1aa1 ("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>
This commit is contained in:
Jakub Kicinski 2019-10-18 09:16:58 -07:00 committed by David S. Miller
parent a7fa12d158
commit e0ad032e14
1 changed files with 2 additions and 0 deletions
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2
net/sched/sch_netem.c
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@ -616,6 +616,8 @@ 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;
}