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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 6302AC04E53 for ; Wed, 15 May 2019 11:21:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 34D322084F for ; Wed, 15 May 2019 11:21:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557919260; bh=P9Zh7+HnD1W3x/1vNoZfd7eNpw8kPS7quFmk9SEtTrw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=nkDaPL80IOTfwZTVDdPLs+PuHKulswZUhbLP0CW670XXf0HreEV6DUxa6KI7ptWmU GfLWyQmsqUHnUIPkmrw/4aZlWdsJIzsWN1VEqvKXPAQEvKiSBQF+71ytFkBO/4oFuK UJxGtbAfVcDS0p99J9yE4Qu1Q1vpEMaJ5ku99K8w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731190AbfEOLU7 (ORCPT ); Wed, 15 May 2019 07:20:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:58798 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731173AbfEOLU5 (ORCPT ); Wed, 15 May 2019 07:20:57 -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 0ED8C2084F; Wed, 15 May 2019 11:20:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557919256; bh=P9Zh7+HnD1W3x/1vNoZfd7eNpw8kPS7quFmk9SEtTrw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WrjERdRnihSEJu498dcDs9GY2nM2i8SV2r70yr3WTb4xpLKEkcBJ2NMjcrDYWkkIi w8zk+qd1teD9gqjfDyeX2l0THeMlozAqeKZ/HOQg7Mof5V/I6QpngeJ7LqFSpM3hz5 NmLAjVUNaIMApV4tT//MaDkiluu5OUjvu5EMf1Zg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hangbin Liu , Richard Cochran , "David S. Miller" Subject: [PATCH 4.14 109/115] vlan: disable SIOCSHWTSTAMP in container Date: Wed, 15 May 2019 12:56:29 +0200 Message-Id: <20190515090707.009482489@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190515090659.123121100@linuxfoundation.org> References: <20190515090659.123121100@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: Hangbin Liu [ Upstream commit 873017af778439f2f8e3d87f28ddb1fcaf244a76 ] With NET_ADMIN enabled in container, a normal user could be mapped to root and is able to change the real device's rx filter via ioctl on vlan, which would affect the other ptp process on host. Fix it by disabling SIOCSHWTSTAMP in container. Fixes: a6111d3c93d0 ("vlan: Pass SIOC[SG]HWTSTAMP ioctls to real device") Signed-off-by: Hangbin Liu Acked-by: Richard Cochran Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/8021q/vlan_dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -366,10 +366,12 @@ static int vlan_dev_ioctl(struct net_dev ifrr.ifr_ifru = ifr->ifr_ifru; switch (cmd) { + case SIOCSHWTSTAMP: + if (!net_eq(dev_net(dev), &init_net)) + break; case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: - case SIOCSHWTSTAMP: case SIOCGHWTSTAMP: if (netif_device_present(real_dev) && ops->ndo_do_ioctl) err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);