[PATCH] net: sched: htb: dont intepret cls results when asked to drop
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From: Ma Ke <hidden>
Date: 2023-09-15 10:57:52
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Subsystem:
networking [general], tc subsystem, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jamal Hadi Salim, Jiri Pirko, Linus Torvalds
If asked to drop a packet via TC_ACT_SHOT it is unsafe to assume that res.class contains a valid pointer. Signed-off-by: Ma Ke <redacted> --- net/sched/sch_htb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 0d947414e616..5e8bd23d972f 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c@@ -243,6 +243,8 @@ static struct htb_class *htb_classify(struct sk_buff *skb, struct Qdisc *sch, *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; while (tcf && (result = tcf_classify(skb, NULL, tcf, &res, false)) >= 0) { + if (result == TC_ACT_SHOT) + return NULL; #ifdef CONFIG_NET_CLS_ACT switch (result) { case TC_ACT_QUEUED:
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2.37.2