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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 88E8EC55186 for ; Wed, 22 Apr 2020 10:05:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5EF9D20784 for ; Wed, 22 Apr 2020 10:05:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587549937; bh=+/PB+AYdWM6kXS4AUrEw7cQyj/+8hWvtqpBUiJRA5S0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GG9kzVvco+5moeHsygkQWG7WXfo2487GP6YCfKbFVaPH1iA93Varkvtrb0yKD3qWH wX6Q+itFNFdaU7YyX/xBfjKBdRCVl5FqtUVq75JMiNVvTv6oNLfB1atyapstdqsh5G JdwXbfnkXJ3MMzJ5izQbRV4+Z18G1udGYo5+a3n0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728190AbgDVKFg (ORCPT ); Wed, 22 Apr 2020 06:05:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:56720 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726941AbgDVKFb (ORCPT ); Wed, 22 Apr 2020 06:05:31 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 49EB020780; Wed, 22 Apr 2020 10:05:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587549930; bh=+/PB+AYdWM6kXS4AUrEw7cQyj/+8hWvtqpBUiJRA5S0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=it7CxpNpSUk4yGtwiTehBLfGbKgzgf8r2mzjS03PLai+nnpmU6x0COsWCRLus5LGZ 9SMKElBTEdOm33bvg3qnd/PZ8B7woXKuDQ3MHhs/6sf33gQ/d/K1fS0rye/hqEbJjB Fqh5Q6ezk4a8jjmUmX2flFYAXf41KRnosPVV+aZI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Taehee Yoo , "David S. Miller" Subject: [PATCH 4.9 066/125] hsr: check protocol version in hsr_newlink() Date: Wed, 22 Apr 2020 11:56:23 +0200 Message-Id: <20200422095043.948209729@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200422095032.909124119@linuxfoundation.org> References: <20200422095032.909124119@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Taehee Yoo [ Upstream commit 4faab8c446def7667adf1f722456c2f4c304069c ] In the current hsr code, only 0 and 1 protocol versions are valid. But current hsr code doesn't check the version, which is received by userspace. Test commands: ip link add dummy0 type dummy ip link add dummy1 type dummy ip link add hsr0 type hsr slave1 dummy0 slave2 dummy1 version 4 In the test commands, version 4 is invalid. So, the command should be failed. After this patch, following error will occur. "Error: hsr: Only versions 0..1 are supported." Fixes: ee1c27977284 ("net/hsr: Added support for HSR v1") Signed-off-by: Taehee Yoo Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/hsr/hsr_netlink.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -63,10 +63,15 @@ static int hsr_newlink(struct net *src_n else multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); - if (!data[IFLA_HSR_VERSION]) + if (!data[IFLA_HSR_VERSION]) { hsr_version = 0; - else + } else { hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]); + if (hsr_version > 1) { + netdev_info(dev, "Only versions 0..1 are supported"); + return -EINVAL; + } + } return hsr_dev_finalize(dev, link, multicast_spec, hsr_version); }