From patchwork Tue Sep 1 15:10:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 310443 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, 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 277FCC433E7 for ; Tue, 1 Sep 2020 15:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E95042078B for ; Tue, 1 Sep 2020 15:44:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598975047; bh=fmxv0V4N9+tf7rxMDoxnYF0FThFSVdaQ05vU8gSpJss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OoKb28dIxdD++Kfgds+vgAbxrUmuiXhNeDEiInj9GBxJp0zoYsNYEa7JPIrBT9k/2 1Js5MSND/rD7cWNGm6NNRNVxWxkfWTviSwfOZw3JaX01TJkNehGYwDr2Ptk6U6x6/d k6WqRc0QsfNy1/FIvnuYVgE8BwckO/OgHvi09a+E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731459AbgIAPoF (ORCPT ); Tue, 1 Sep 2020 11:44:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:58738 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731756AbgIAPn7 (ORCPT ); Tue, 1 Sep 2020 11:43:59 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 638AC2064B; Tue, 1 Sep 2020 15:43:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598975038; bh=fmxv0V4N9+tf7rxMDoxnYF0FThFSVdaQ05vU8gSpJss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YuJe38zRU334eqOrKqPNubGoNYA3Xa9QmzKAR2/EatHoBUk/c3uOG7bwReL7oq0yK Uu+oLDmOOetZtvwp+bhHfbrrjM0dOCPWlKZ+PGGEDWboTQEMZYMxhCDToDPNoeF9Zm O4R9xT/wVSy87r594D95f6E8sbxZx7WJ0364dZD0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?Alvin_=C5=A0ipraga?= , "David S. Miller" , Sasha Levin Subject: [PATCH 5.8 155/255] macvlan: validate setting of multiple remote source MAC addresses Date: Tue, 1 Sep 2020 17:10:11 +0200 Message-Id: <20200901151008.117626476@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alvin Šipraga [ Upstream commit 8b61fba503904acae24aeb2bd5569b4d6544d48f ] Remote source MAC addresses can be set on a 'source mode' macvlan interface via the IFLA_MACVLAN_MACADDR_DATA attribute. This commit tightens the validation of these MAC addresses to match the validation already performed when setting or adding a single MAC address via the IFLA_MACVLAN_MACADDR attribute. iproute2 uses IFLA_MACVLAN_MACADDR_DATA for its 'macvlan macaddr set' command, and IFLA_MACVLAN_MACADDR for its 'macvlan macaddr add' command, which demonstrates the inconsistent behaviour that this commit addresses: # ip link add link eth0 name macvlan0 type macvlan mode source # ip link set link dev macvlan0 type macvlan macaddr add 01:00:00:00:00:00 RTNETLINK answers: Cannot assign requested address # ip link set link dev macvlan0 type macvlan macaddr set 01:00:00:00:00:00 # ip -d link show macvlan0 5: macvlan0@eth0: mtu 1500 ... link/ether 2e:ac:fd:2d:69:f8 brd ff:ff:ff:ff:ff:ff promiscuity 0 macvlan mode source remotes (1) 01:00:00:00:00:00 numtxqueues 1 ... With this change, the 'set' command will (rightly) fail in the same way as the 'add' command. Signed-off-by: Alvin Šipraga Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/macvlan.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 4942f6112e51f..5da04e9979894 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -1269,6 +1269,9 @@ static void macvlan_port_destroy(struct net_device *dev) static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) { + struct nlattr *nla, *head; + int rem, len; + if (tb[IFLA_ADDRESS]) { if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) return -EINVAL; @@ -1316,6 +1319,20 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], return -EADDRNOTAVAIL; } + if (data[IFLA_MACVLAN_MACADDR_DATA]) { + head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); + len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); + + nla_for_each_attr(nla, head, len, rem) { + if (nla_type(nla) != IFLA_MACVLAN_MACADDR || + nla_len(nla) != ETH_ALEN) + return -EINVAL; + + if (!is_valid_ether_addr(nla_data(nla))) + return -EADDRNOTAVAIL; + } + } + if (data[IFLA_MACVLAN_MACADDR_COUNT]) return -EINVAL; @@ -1372,10 +1389,6 @@ static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); nla_for_each_attr(nla, head, len, rem) { - if (nla_type(nla) != IFLA_MACVLAN_MACADDR || - nla_len(nla) != ETH_ALEN) - continue; - addr = nla_data(nla); ret = macvlan_hash_add_source(vlan, addr); if (ret)