From patchwork Thu Sep 30 20:51:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bodong Wang X-Patchwork-Id: 1535049 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4HL5585Rlfz9t0T for ; Fri, 1 Oct 2021 06:51:40 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1mW31i-0003LU-H4; Thu, 30 Sep 2021 20:51:34 +0000 Received: from mail-il-dmz.mellanox.com ([193.47.165.129] helo=mellanox.co.il) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1mW31b-0003IX-W4 for kernel-team@lists.ubuntu.com; Thu, 30 Sep 2021 20:51:28 +0000 Received: from Internal Mail-Server by MTLPINE1 (envelope-from bodong@nvidia.com) with SMTP; 30 Sep 2021 23:51:24 +0300 Received: from sw-mtx-016.mtx.labs.mlnx. (sw-mtx-016.mtx.labs.mlnx [10.9.150.102]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 18UKpKXM027584; Thu, 30 Sep 2021 23:51:23 +0300 From: Bodong Wang To: kernel-team@lists.ubuntu.com Subject: [SRU][F:linux-bluefield][PATCH 2/4] net/sched: cls_flower: Reject invalid ct_state flags rules Date: Thu, 30 Sep 2021 15:51:18 -0500 Message-Id: <1633035080-11793-3-git-send-email-bodong@nvidia.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1633035080-11793-1-git-send-email-bodong@nvidia.com> References: <1633035080-11793-1-git-send-email-bodong@nvidia.com> X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ozsh@nvidia.com, paulb@nvidia.com, maord@nvidia.com MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" From: wenxu BugLink: https://bugs.launchpad.net/bugs/1944390 Reject the unsupported and invalid ct_state flags of cls flower rules. Fixes: e0ace68af2ac ("net/sched: cls_flower: Add matching on conntrack info") Signed-off-by: wenxu Reviewed-by: Marcelo Ricardo Leitner Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller (Cherry-picked from upstream commit 1bcc51ac0731aab1b109b2cd5c3d495f1884e5ca) Signed-off-by: Paul Blakey Signed-off-by: Bodong Wang --- include/uapi/linux/pkt_cls.h | 2 ++ net/sched/cls_flower.c | 39 +++++++++++++++++++++++++++++++++++++-- 2 files changed, 39 insertions(+), 2 deletions(-) diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h index 624dfe2..b089c2d 100644 --- a/include/uapi/linux/pkt_cls.h +++ b/include/uapi/linux/pkt_cls.h @@ -567,6 +567,8 @@ enum { TCA_FLOWER_KEY_CT_FLAGS_TRACKED = 1 << 3, /* Conntrack has occurred. */ TCA_FLOWER_KEY_CT_FLAGS_INVALID = 1 << 4, /* Conntrack is invalid. */ TCA_FLOWER_KEY_CT_FLAGS_REPLY = 1 << 5, /* Packet is in the reply direction. */ + + __TCA_FLOWER_KEY_CT_FLAGS_MAX, }; enum { diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index d4d891d..b6e4787 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -28,6 +28,11 @@ #include +#define TCA_FLOWER_KEY_CT_FLAGS_MAX \ + ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) +#define TCA_FLOWER_KEY_CT_FLAGS_MASK \ + (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) + struct fl_flow_key { struct flow_dissector_key_meta meta; struct flow_dissector_key_control control; @@ -684,8 +689,10 @@ static void *fl_get(struct tcf_proto *tp, u32 handle) [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, - [TCA_FLOWER_KEY_CT_STATE] = { .type = NLA_U16 }, - [TCA_FLOWER_KEY_CT_STATE_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_CT_STATE] = + NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), + [TCA_FLOWER_KEY_CT_STATE_MASK] = + NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, @@ -1008,12 +1015,33 @@ static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, return 0; } +static int fl_validate_ct_state(u16 state, struct nlattr *tb, + struct netlink_ext_ack *extack) +{ + if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { + NL_SET_ERR_MSG_ATTR(extack, tb, + "no trk, so no other flag can be set"); + return -EINVAL; + } + + if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && + state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { + NL_SET_ERR_MSG_ATTR(extack, tb, + "new and est are mutually exclusive"); + return -EINVAL; + } + + return 0; +} + static int fl_set_key_ct(struct nlattr **tb, struct flow_dissector_key_ct *key, struct flow_dissector_key_ct *mask, struct netlink_ext_ack *extack) { if (tb[TCA_FLOWER_KEY_CT_STATE]) { + int err; + if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); return -EOPNOTSUPP; @@ -1021,6 +1049,13 @@ static int fl_set_key_ct(struct nlattr **tb, fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, sizeof(key->ct_state)); + + err = fl_validate_ct_state(mask->ct_state, + tb[TCA_FLOWER_KEY_CT_STATE_MASK], + extack); + if (err) + return err; + } if (tb[TCA_FLOWER_KEY_CT_ZONE]) { if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {