From patchwork Fri Sep 15 10:56:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ma Ke X-Patchwork-Id: 13386875 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 783EEDF43 for ; Fri, 15 Sep 2023 10:57:50 +0000 (UTC) Received: from m12.mail.163.com (m12.mail.163.com [220.181.12.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6E644C1; Fri, 15 Sep 2023 03:57:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=K1WVK BLMutY4DqmK6xRjujxKt6vIdorbFmbMAqFpgAA=; b=G63GLx9GmkBYqRUVmi76r lLUNWLCFHMEGj7ctPoAKrwQY/y4BfhHQff3tSj7o1K+apdWy3T3wdNnRRGthxz7u NNj6RTNeBXMpv0FVXc5ebM9JIc1nyqB+tK6r445qHG08iCogM8XWM1dSZftp9i1N /Lgb/hDJKtseniVbn1EZ5M= Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by zwqz-smtp-mta-g3-0 (Coremail) with SMTP id _____wB3NjN9OARlbOJwCA--.60164S4; Fri, 15 Sep 2023 18:57:12 +0800 (CST) From: Ma Ke To: jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Ma Ke Subject: [PATCH] net: sched: htb: dont intepret cls results when asked to drop Date: Fri, 15 Sep 2023 18:56:58 +0800 Message-Id: <20230915105658.3407020-1-make_ruc2021@163.com> X-Mailer: git-send-email 2.37.2 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: _____wB3NjN9OARlbOJwCA--.60164S4 X-Coremail-Antispam: 1Uf129KBjvdXoWruFW7ury8Jr43Ar1kKw43trb_yoW3JFc_A3 s7GFs3CF1xCFn5Gw47Ar40kryFk3WSv3Z7J39xKrs7Xw1FkrZ8Gr1kWFs3J393Wr42kFyU ZasFga45GrnIkjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRKfHUJUUUUU== X-Originating-IP: [183.174.60.14] X-CM-SenderInfo: 5pdnvshuxfjiisr6il2tof0z/xtbBFQTrC2B9oIcqyQAAso X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_BL, RCVD_IN_MSPIKE_L4,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org 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 --- 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: