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=-7.1 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 E1E1EC282C3 for ; Thu, 24 Jan 2019 20:11:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9BA15218D0 for ; Thu, 24 Jan 2019 20:11:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548360661; bh=xrdeE7+G5NxFGihwCcrHlwJn3lIcpHzEY5dv+OgmZoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Vgxo0NaDe0g+g7XtuhLzHDdH1xC4UQ9LCV18vtjIBXRil5VNl3CC+8e2xEHjIw984 t9tnPX7d/Yg3LgFqNHp+c4XTiGDJDGL0nZAULXeH3TuoLPyiZC6ddLLbhzE9LfTC2k tYFAmfKNYm91Eq8aVuWsjKvYKHeqRBWtA6hSDjdA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730154AbfAXULA (ORCPT ); Thu, 24 Jan 2019 15:11:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:53528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730733AbfAXT1R (ORCPT ); Thu, 24 Jan 2019 14:27:17 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 A0ABF218A6; Thu, 24 Jan 2019 19:27:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358037; bh=xrdeE7+G5NxFGihwCcrHlwJn3lIcpHzEY5dv+OgmZoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KTodpGok7MpFIGdWvDZ7K8KEB8Nvy8+gqfjJfnYMQ5dZG7yxnVrGm31vqaLClqxlA Z9rn99raARWrcPpt4GvOHY8cqiaCyyV7f23hW3Vufzm4n/En+SHm7AgsPkxXAwiM/g Q7uiHonYcIVrBii7d0srjzS5I/3XmJtD02Bj1ggU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Ahern , "David S. Miller" Subject: [PATCH 4.4 074/104] ipv6: Consider sk_bound_dev_if when binding a socket to a v4 mapped address Date: Thu, 24 Jan 2019 20:20:03 +0100 Message-Id: <20190124190203.672814583@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190154.968308875@linuxfoundation.org> References: <20190124190154.968308875@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Ahern [ Upstream commit ec90ad334986fa5856d11dd272f7f22fa86c55c4 ] Similar to c5ee066333eb ("ipv6: Consider sk_bound_dev_if when binding a socket to an address"), binding a socket to v4 mapped addresses needs to consider if the socket is bound to a device. This problem also exists from the beginning of git history. Signed-off-by: David Ahern Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/af_inet6.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -292,6 +292,7 @@ int inet6_bind(struct socket *sock, stru /* Check if the address belongs to the host. */ if (addr_type == IPV6_ADDR_MAPPED) { + struct net_device *dev = NULL; int chk_addr_ret; /* Binding to v4-mapped address on a v6-only socket @@ -302,9 +303,17 @@ int inet6_bind(struct socket *sock, stru goto out; } + if (sk->sk_bound_dev_if) { + dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); + if (!dev) { + err = -ENODEV; + goto out; + } + } + /* Reproduce AF_INET checks to make the bindings consistent */ v4addr = addr->sin6_addr.s6_addr32[3]; - chk_addr_ret = inet_addr_type(net, v4addr); + chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); if (!net->ipv4.sysctl_ip_nonlocal_bind && !(inet->freebind || inet->transparent) && v4addr != htonl(INADDR_ANY) &&