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net/sched: sch_ingress: Only create under TC_H_INGRESS 

ingress Qdiscs are only supposed to be created under TC_H_INGRESS.
Return -EOPNOTSUPP if 'parent' is not TC_H_INGRESS, similar to
mq_init().

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: syzbot+b53a9c0d1ea4ad62da8b@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/r/0000000000006cf87705f79acf1a@google.com/
Tested-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Peilin Ye 2023-05-29 12:52:55 -07:00 committed by Jakub Kicinski
parent 7ba0732c80
commit c7cfbd1150
1 changed files with 6 additions and 0 deletions
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6
net/sched/sch_ingress.c
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@ -80,6 +80,9 @@ static int ingress_init(struct Qdisc *sch, struct nlattr *opt,
struct net_device *dev = qdisc_dev(sch);
int err;
if (sch->parent != TC_H_INGRESS)
return -EOPNOTSUPP;
net_inc_ingress_queue();
mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress);
@ -101,6 +104,9 @@ static void ingress_destroy(struct Qdisc *sch)
{
struct ingress_sched_data *q = qdisc_priv(sch);
if (sch->parent != TC_H_INGRESS)
return;
tcf_block_put_ext(q->block, sch, &q->block_info);
net_dec_ingress_queue();
}