From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C50001ED38 for ; Tue, 25 Jul 2023 11:26:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46A7EC433C8; Tue, 25 Jul 2023 11:26:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690284414; bh=buOdSrwBY2i9Z3LLwxVY+Rr6q8F4NyizMsrrqrJmxcQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bV2siBkqi244jcje+UmxtaD2ZE2qGoHczlkC3djc1lcHTVtpUdB3xDV3fgFYPkOcT rjI/7V9qBBsQLUuAuXOxc1WF6+4FDaoA3w4Zp3/8jr7TwJkGLHAgQdmDnfB2nEVZlO sJGyIsKg5JYNnHTm2j/fk2eF+m1r4UwRR6aPbl78= From: Greg Kroah-Hartman To: stable@vger.kernel.org, netfilter-devel@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso Subject: [PATCH 5.10 318/509] netfilter: nf_tables: reject unbound chain set before commit phase Date: Tue, 25 Jul 2023 12:44:17 +0200 Message-ID: <20230725104608.265852367@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725104553.588743331@linuxfoundation.org> References: <20230725104553.588743331@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Pablo Neira Ayuso [ Upstream commit 62e1e94b246e685d89c3163aaef4b160e42ceb02 ] Use binding list to track set transaction and to check for unbound chains before entering the commit phase. Bail out if chain binding remain unused before entering the commit step. Fixes: d0e2c7de92c7 ("netfilter: nf_tables: add NFT_CHAIN_BINDING") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- net/netfilter/nf_tables_api.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -360,6 +360,11 @@ static void nft_trans_commit_list_add_ta if (nft_set_is_anonymous(nft_trans_set(trans))) list_add_tail(&trans->binding_list, &nft_net->binding_list); break; + case NFT_MSG_NEWCHAIN: + if (!nft_trans_chain_update(trans) && + nft_chain_binding(nft_trans_chain(trans))) + list_add_tail(&trans->binding_list, &nft_net->binding_list); + break; } list_add_tail(&trans->list, &nft_net->commit_list); @@ -8043,6 +8048,14 @@ static int nf_tables_commit(struct net * return -EINVAL; } break; + case NFT_MSG_NEWCHAIN: + if (!nft_trans_chain_update(trans) && + nft_chain_binding(nft_trans_chain(trans)) && + !nft_trans_chain_bound(trans)) { + pr_warn_once("nftables ruleset with unbound chain\n"); + return -EINVAL; + } + break; } }