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=unavailable 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 720C4C04E53 for ; Wed, 15 May 2019 11:36:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3A0F52053B for ; Wed, 15 May 2019 11:36:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557920170; bh=zgxJFo41n2tRNguAeuAbLqkNgYqPJNN4eVAR+xGXUoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sRfis4YAr4qNG3Nh8gFCS5hsI0XRVBRl9c3keRH9xjqImVBtnjDaoFUTzC4eRi+nc zvltdXRhXb+pQcx1pwbvQBh6m6bIq9WnDLbyTbAvFo1aXhqDxgppxc1nV1L1aZQLrD 169tIj/jfqyQwqUH9YKZSelS8g6V66MXw6Taog7Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733115AbfEOLc6 (ORCPT ); Wed, 15 May 2019 07:32:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:44902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733110AbfEOLc4 (ORCPT ); Wed, 15 May 2019 07:32:56 -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 D0EA4206BF; Wed, 15 May 2019 11:32:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557919976; bh=zgxJFo41n2tRNguAeuAbLqkNgYqPJNN4eVAR+xGXUoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A57E3hU2GDt6tjDksdNCIeCAd1/0GGBEFDTt+JW3JRFhxz6kn82st3QfvFkKbulfD KZeT19m/JycLNF4DFhy4TBfaTqc7lExEw+NSJv8qIZVGmUTt5hNUq7iiJVg2RjUNfm /swsHwwwlGaxDOhZCLfoVkXoUI43oQssqR7kxwBk= 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 5.1 27/46] vlan: disable SIOCSHWTSTAMP in container Date: Wed, 15 May 2019 12:56:51 +0200 Message-Id: <20190515090625.571849309@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190515090616.670410738@linuxfoundation.org> References: <20190515090616.670410738@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -367,10 +367,12 @@ 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);