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Message-Id: <b0b07ae90beda315160bdc9a7f7f06c95a9ed47c.1684796705.git.peilin.ye@bytedance.com> Date: Mon, 22 May 2023 16:53:33 -0700 From: Peilin Ye <yepeilin.cs@...il.com> To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Jamal Hadi Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us> Cc: Peilin Ye <peilin.ye@...edance.com>, Daniel Borkmann <daniel@...earbox.net>, John Fastabend <john.fastabend@...il.com>, Vlad Buslov <vladbu@...lanox.com>, Pedro Tammela <pctammela@...atatu.com>, Hillf Danton <hdanton@...a.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Cong Wang <cong.wang@...edance.com>, Peilin Ye <yepeilin.cs@...il.com> Subject: [PATCH v2 net 1/6] net/sched: sch_ingress: Only create under TC_H_INGRESS ingress Qdiscs are only supposed to be created under TC_H_INGRESS. Similar to mq_init(), return -EOPNOTSUPP if 'parent' is not TC_H_INGRESS. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: syzbot+b53a9c0d1ea4ad62da8b@...kaller.appspotmail.com Closes: https://lore.kernel.org/r/0000000000006cf87705f79acf1a@google.com/ Reviewed-by: Jamal Hadi Salim <jhs@...atatu.com> Acked-by: Jamal Hadi Salim <jhs@...atatu.com> Signed-off-by: Peilin Ye <peilin.ye@...edance.com> --- net/sched/sch_ingress.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c index 84838128b9c5..3d71f7a3b4ad 100644 --- a/net/sched/sch_ingress.c +++ b/net/sched/sch_ingress.c @@ -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); -- 2.20.1
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