From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C313C48BE0 for ; Wed, 9 Jun 2021 21:45:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED491613EF for ; Wed, 9 Jun 2021 21:45:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230230AbhFIVrw (ORCPT ); Wed, 9 Jun 2021 17:47:52 -0400 Received: from mail.netfilter.org ([217.70.188.207]:60534 "EHLO mail.netfilter.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230077AbhFIVre (ORCPT ); Wed, 9 Jun 2021 17:47:34 -0400 Received: from localhost.localdomain (unknown [90.77.255.23]) by mail.netfilter.org (Postfix) with ESMTPSA id 1725464237; Wed, 9 Jun 2021 23:44:25 +0200 (CEST) From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org Subject: [PATCH net-next 13/13] netfilter: nf_tables: move base hook annotation to init helper Date: Wed, 9 Jun 2021 23:45:23 +0200 Message-Id: <20210609214523.1678-14-pablo@netfilter.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210609214523.1678-1-pablo@netfilter.org> References: <20210609214523.1678-1-pablo@netfilter.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Florian Westphal coverity scanner says: 2187 if (nft_is_base_chain(chain)) { vvv CID 1505166: Memory - corruptions (UNINIT) vvv Using uninitialized value "basechain". 2188 basechain->ops.hook_ops_type = NF_HOOK_OP_NF_TABLES; ... I don't see how nft_is_base_chain() can evaluate to true while basechain pointer is garbage. However, it seems better to place the NF_HOOK_OP_NF_TABLES annotation in nft_basechain_hook_init() instead. Reported-by: coverity-bot Addresses-Coverity-ID: 1505166 ("Memory - corruptions") Fixes: 65b8b7bfc5284f ("netfilter: annotate nf_tables base hook ops") Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c9308241b688..caaff7ab9e73 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -1997,11 +1997,12 @@ static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family, const struct nft_chain_hook *hook, struct nft_chain *chain) { - ops->pf = family; - ops->hooknum = hook->num; - ops->priority = hook->priority; - ops->priv = chain; - ops->hook = hook->type->hooks[ops->hooknum]; + ops->pf = family; + ops->hooknum = hook->num; + ops->priority = hook->priority; + ops->priv = chain; + ops->hook = hook->type->hooks[ops->hooknum]; + ops->hook_ops_type = NF_HOOK_OP_NF_TABLES; } static int nft_basechain_init(struct nft_base_chain *basechain, u8 family, @@ -2168,10 +2169,8 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, } nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET; - if (nft_is_base_chain(chain)) { - basechain->ops.hook_ops_type = NF_HOOK_OP_NF_TABLES; + if (nft_is_base_chain(chain)) nft_trans_chain_policy(trans) = policy; - } err = nft_chain_add(table, chain); if (err < 0) { -- 2.30.2