From patchwork Mon Mar 30 00:37:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pablo Neira Ayuso X-Patchwork-Id: 221613 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 7BD40C2D0EF for ; Mon, 30 Mar 2020 00:37:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B2C220786 for ; Mon, 30 Mar 2020 00:37:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728180AbgC3Ahk (ORCPT ); Sun, 29 Mar 2020 20:37:40 -0400 Received: from correo.us.es ([193.147.175.20]:57236 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728047AbgC3Ah1 (ORCPT ); Sun, 29 Mar 2020 20:37:27 -0400 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 6D166EF42A for ; Mon, 30 Mar 2020 02:37:25 +0200 (CEST) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 5D93D100A50 for ; Mon, 30 Mar 2020 02:37:25 +0200 (CEST) Received: by antivirus1-rhel7.int (Postfix, from userid 99) id 53572100A4B; Mon, 30 Mar 2020 02:37:25 +0200 (CEST) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 73FEDDA736; Mon, 30 Mar 2020 02:37:23 +0200 (CEST) Received: from 192.168.1.97 (192.168.1.97) by antivirus1-rhel7.int (F-Secure/fsigk_smtp/550/antivirus1-rhel7.int); Mon, 30 Mar 2020 02:37:23 +0200 (CEST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/antivirus1-rhel7.int) Received: from salvia.here (unknown [90.77.255.23]) (Authenticated sender: pneira@us.es) by entrada.int (Postfix) with ESMTPA id 44BED42EF42A; Mon, 30 Mar 2020 02:37:23 +0200 (CEST) X-SMTPAUTHUS: auth mail.us.es From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org Subject: [PATCH 23/26] netfilter: nft_dynset: validate set expression definition Date: Mon, 30 Mar 2020 02:37:05 +0200 Message-Id: <20200330003708.54017-24-pablo@netfilter.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20200330003708.54017-1-pablo@netfilter.org> References: <20200330003708.54017-1-pablo@netfilter.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org If the global set expression definition mismatches the dynset expression, then bail out. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_dynset.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c index d1b64c8de585..64ca13a1885b 100644 --- a/net/netfilter/nft_dynset.c +++ b/net/netfilter/nft_dynset.c @@ -187,6 +187,11 @@ static int nft_dynset_init(const struct nft_ctx *ctx, tb[NFTA_DYNSET_EXPR]); if (IS_ERR(priv->expr)) return PTR_ERR(priv->expr); + + if (set->expr && set->expr->ops != priv->expr->ops) { + err = -EOPNOTSUPP; + goto err_expr_free; + } } nft_set_ext_prepare(&priv->tmpl); @@ -205,7 +210,7 @@ static int nft_dynset_init(const struct nft_ctx *ctx, err = nf_tables_bind_set(ctx, set, &priv->binding); if (err < 0) - goto err1; + goto err_expr_free; if (set->size == 0) set->size = 0xffff; @@ -213,7 +218,7 @@ static int nft_dynset_init(const struct nft_ctx *ctx, priv->set = set; return 0; -err1: +err_expr_free: if (priv->expr != NULL) nft_expr_destroy(ctx, priv->expr); return err;