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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0097C2BB43 for ; Mon, 15 Aug 2022 20:27:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346676AbiHOU1O (ORCPT ); Mon, 15 Aug 2022 16:27:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347738AbiHOU0d (ORCPT ); Mon, 15 Aug 2022 16:26:33 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28F219DFA8; Mon, 15 Aug 2022 12:03:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E41F761299; Mon, 15 Aug 2022 19:03:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2C00C433D7; Mon, 15 Aug 2022 19:03:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660590207; bh=pMLp0+qYNKEIUa9AGUAmCf0y2RNO1+e4eW/XAxC26Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JbL9p6j4Cn0XwGsSWa21uXcOIMhAPMn0nMfW35ay8rAo8fpUYPCjYpaR+TIrBU6sE gl6RCpvWKQB6G1Vi0EMKW7Jxc/OFXQiDhDpVNjHHuZpzvym4fsf8wLxE1pBmK4iDaU asKUB/ZJLxLVo/tyVGgHw+7gbYf8XuLOgKwhMQwo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Florian Westphal , Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.18 0186/1095] netfilter: nft_queue: only allow supported familes and hooks Date: Mon, 15 Aug 2022 19:53:05 +0200 Message-Id: <20220815180437.333474752@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Florian Westphal [ Upstream commit 47f4f510ad586032b85c89a0773fbb011d412425 ] Trying to use 'queue' statement in ingress (for example) triggers a splat on reinject: WARNING: CPU: 3 PID: 1345 at net/netfilter/nf_queue.c:291 ... because nf_reinject cannot find the ruleset head. The netdev family doesn't support async resume at the moment anyway, so disallow loading such rulesets with a more appropriate error message. v2: add 'validate' callback and also check hook points, v1 did allow ingress use in 'table inet', but that doesn't work either. (Pablo) Signed-off-by: Florian Westphal Reviewed-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nft_queue.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/net/netfilter/nft_queue.c b/net/netfilter/nft_queue.c index 15e4b7640dc0..da29e92c03e2 100644 --- a/net/netfilter/nft_queue.c +++ b/net/netfilter/nft_queue.c @@ -68,6 +68,31 @@ static void nft_queue_sreg_eval(const struct nft_expr *expr, regs->verdict.code = ret; } +static int nft_queue_validate(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nft_data **data) +{ + static const unsigned int supported_hooks = ((1 << NF_INET_PRE_ROUTING) | + (1 << NF_INET_LOCAL_IN) | + (1 << NF_INET_FORWARD) | + (1 << NF_INET_LOCAL_OUT) | + (1 << NF_INET_POST_ROUTING)); + + switch (ctx->family) { + case NFPROTO_IPV4: + case NFPROTO_IPV6: + case NFPROTO_INET: + case NFPROTO_BRIDGE: + break; + case NFPROTO_NETDEV: /* lacks okfn */ + fallthrough; + default: + return -EOPNOTSUPP; + } + + return nft_chain_validate_hooks(ctx->chain, supported_hooks); +} + static const struct nla_policy nft_queue_policy[NFTA_QUEUE_MAX + 1] = { [NFTA_QUEUE_NUM] = { .type = NLA_U16 }, [NFTA_QUEUE_TOTAL] = { .type = NLA_U16 }, @@ -164,6 +189,7 @@ static const struct nft_expr_ops nft_queue_ops = { .eval = nft_queue_eval, .init = nft_queue_init, .dump = nft_queue_dump, + .validate = nft_queue_validate, .reduce = NFT_REDUCE_READONLY, }; @@ -173,6 +199,7 @@ static const struct nft_expr_ops nft_queue_sreg_ops = { .eval = nft_queue_sreg_eval, .init = nft_queue_sreg_init, .dump = nft_queue_sreg_dump, + .validate = nft_queue_validate, .reduce = NFT_REDUCE_READONLY, }; -- 2.35.1