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 0AC6A7E767; Wed, 21 Feb 2024 14:06:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708524418; cv=none; b=It2RI9qzSYQrK3XUbV7wR1SncqQ2PLpiNdSHzv8IQNunlyODl8lD8s9VJQbJXGtoK1YGpStobMLz5X1l5+Md/4ldv0tZOpX8VWccbsCCQfNd9ArLfdXgRDcmAi5sd4ka53FJarV1Yb1texMHiqUKLXzEMhUXPAwQ5gaV92gQZlY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708524418; c=relaxed/simple; bh=63NfB0phzh4spG1ZxMdIe6xRlNryNStt9lIhbMweCkI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ck699BEGYh3MFYbh0HKoLlot+XKraQ4gRP2Iv09wYqMwfXQkHmBMjfLMZikP5ZAfwN5M/NgxQN4S9k4obQiZiucT9x1fsAk86pQLb2wH6kBRWnTNO/V+Pw1apFIEdUMMLqn4Ip4NFDAsWW8o36jEIZKLqH1IW8BmCQpvcexo2rQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vWHHJ7FM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="vWHHJ7FM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88B09C433F1; Wed, 21 Feb 2024 14:06:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708524417; bh=63NfB0phzh4spG1ZxMdIe6xRlNryNStt9lIhbMweCkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vWHHJ7FM8rvwrD95tKr5DwvRyy5Ox7NzLA+zBonMQestzxieorJdjc4yajj1BbL5H awXO5WVYeWzoWOF7yI0N8ZkKweNAHsrdBen43YFGcp6/QiSXL2dsk9YFxKlVp1D2sZ 821rJoTv1mXXIeR1wWh/L8YSwRIC53VQDF27lGv4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.10 237/379] netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations Date: Wed, 21 Feb 2024 14:06:56 +0100 Message-ID: <20240221130001.925365226@linuxfoundation.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240221125954.917878865@linuxfoundation.org> References: <20240221125954.917878865@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso [ Upstream commit 8059918a1377f2f1fff06af4f5a4ed3d5acd6bc4 ] - Disallow families other than NFPROTO_{IPV4,IPV6,INET}. - Disallow layer 4 protocol with no ports, since destination port is a mandatory attribute for this object. Fixes: 857b46027d6f ("netfilter: nft_ct: add ct expectations support") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nft_ct.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c index 14093d86e682..5b16161526e7 100644 --- a/net/netfilter/nft_ct.c +++ b/net/netfilter/nft_ct.c @@ -1182,7 +1182,31 @@ static int nft_ct_expect_obj_init(const struct nft_ctx *ctx, if (tb[NFTA_CT_EXPECT_L3PROTO]) priv->l3num = ntohs(nla_get_be16(tb[NFTA_CT_EXPECT_L3PROTO])); + switch (priv->l3num) { + case NFPROTO_IPV4: + case NFPROTO_IPV6: + if (priv->l3num != ctx->family) + return -EINVAL; + + fallthrough; + case NFPROTO_INET: + break; + default: + return -EOPNOTSUPP; + } + priv->l4proto = nla_get_u8(tb[NFTA_CT_EXPECT_L4PROTO]); + switch (priv->l4proto) { + case IPPROTO_TCP: + case IPPROTO_UDP: + case IPPROTO_UDPLITE: + case IPPROTO_DCCP: + case IPPROTO_SCTP: + break; + default: + return -EOPNOTSUPP; + } + priv->dport = nla_get_be16(tb[NFTA_CT_EXPECT_DPORT]); priv->timeout = nla_get_u32(tb[NFTA_CT_EXPECT_TIMEOUT]); priv->size = nla_get_u8(tb[NFTA_CT_EXPECT_SIZE]); -- 2.43.0