From patchwork Wed Aug 17 14:00:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12945933 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFD1BC28B2B for ; Wed, 17 Aug 2022 14:02:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239899AbiHQOCs (ORCPT ); Wed, 17 Aug 2022 10:02:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239897AbiHQOCI (ORCPT ); Wed, 17 Aug 2022 10:02:08 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56F257E333; Wed, 17 Aug 2022 07:01:41 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oOJc3-0008Rk-TC; Wed, 17 Aug 2022 16:01:39 +0200 From: Florian Westphal To: netdev@vger.kernel.org Cc: , Pablo Neira Ayuso , Paolo Abeni , "David S. Miller" , Eric Dumazet , Jakub Kicinski Subject: [PATCH net 12/17] netfilter: nf_tables: NFTA_SET_ELEM_KEY_END requires concat and interval flags Date: Wed, 17 Aug 2022 16:00:10 +0200 Message-Id: <20220817140015.25843-13-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220817140015.25843-1-fw@strlen.de> References: <20220817140015.25843-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Pablo Neira Ayuso If the NFT_SET_CONCAT|NFT_SET_INTERVAL flags are set on, then the netlink attribute NFTA_SET_ELEM_KEY_END must be specified. Otherwise, NFTA_SET_ELEM_KEY_END should not be present. For catch-all element, NFTA_SET_ELEM_KEY_END should not be present. The NFT_SET_ELEM_INTERVAL_END is never used with this set flags combination. Fixes: 7b225d0b5c6d ("netfilter: nf_tables: add NFTA_SET_ELEM_KEY_END attribute") Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index bcfe8120e014..1d14d694f654 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -5844,6 +5844,24 @@ static void nft_setelem_remove(const struct net *net, set->ops->remove(net, set, elem); } +static bool nft_setelem_valid_key_end(const struct nft_set *set, + struct nlattr **nla, u32 flags) +{ + if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) == + (NFT_SET_CONCAT | NFT_SET_INTERVAL)) { + if (flags & NFT_SET_ELEM_INTERVAL_END) + return false; + if (!nla[NFTA_SET_ELEM_KEY_END] && + !(flags & NFT_SET_ELEM_CATCHALL)) + return false; + } else { + if (nla[NFTA_SET_ELEM_KEY_END]) + return false; + } + + return true; +} + static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, const struct nlattr *attr, u32 nlmsg_flags) { @@ -5903,6 +5921,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, return -EINVAL; } + if (!nft_setelem_valid_key_end(set, nla, flags)) + return -EINVAL; + if ((flags & NFT_SET_ELEM_INTERVAL_END) && (nla[NFTA_SET_ELEM_DATA] || nla[NFTA_SET_ELEM_OBJREF] || @@ -6333,6 +6354,9 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set, if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL)) return -EINVAL; + if (!nft_setelem_valid_key_end(set, nla, flags)) + return -EINVAL; + nft_set_ext_prepare(&tmpl); if (flags != 0) {