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Message-Id: <72c5a2b8ae1c3301175419a18da18f186818fa7c.1684821877.git.peilin.ye@bytedance.com>
Date: Mon, 22 May 2023 23:19:44 -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 <yepeilin.cs@...il.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 <peilin.ye@...edance.com>
Subject: [PATCH v3 net 1/6] net/sched: sch_ingress: Only create under TC_H_INGRESS
From: Peilin Ye <yepeilin.cs@...il.com>
From: Peilin Ye <peilin.ye@...edance.com>
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>
---
change in v3:
- add in-body From: tag
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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