From patchwork Wed Mar 25 02:24:48 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vlad Yasevich X-Patchwork-Id: 25039 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by ozlabs.org (Postfix) with ESMTP id CEC7EDDEF7 for ; Wed, 25 Mar 2009 13:25:08 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756909AbZCYCZF (ORCPT ); Tue, 24 Mar 2009 22:25:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756835AbZCYCZB (ORCPT ); Tue, 24 Mar 2009 22:25:01 -0400 Received: from g5t0009.atlanta.hp.com ([15.192.0.46]:5792 "EHLO g5t0009.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755971AbZCYCY5 (ORCPT ); Tue, 24 Mar 2009 22:24:57 -0400 Received: from smtp2.fc.hp.com (smtp.cnd.hp.com [15.11.136.114]) by g5t0009.atlanta.hp.com (Postfix) with ESMTP id 91CDA303DB; Wed, 25 Mar 2009 02:24:56 +0000 (UTC) Received: from localhost.localdomain (squirrel.fc.hp.com [15.11.146.57]) by smtp2.fc.hp.com (Postfix) with ESMTP id 1F4482BD6E6; Wed, 25 Mar 2009 02:01:10 +0000 (UTC) From: Vlad Yasevich To: davem@davemloft.net Cc: netdev@vger.kernel.org, Vlad Yasevich Subject: [PATCH v2 1/4] ipv6: Disallow binding to v4-mapped address on v6-only socket. Date: Tue, 24 Mar 2009 22:24:48 -0400 Message-Id: <1237947891-26825-2-git-send-email-vladislav.yasevich@hp.com> X-Mailer: git-send-email 1.5.4.3 In-Reply-To: <1237947891-26825-1-git-send-email-vladislav.yasevich@hp.com> References: <1237947891-26825-1-git-send-email-vladislav.yasevich@hp.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A socket marked v6-only, can not receive or send traffic to v4-mapped addresses. Thus allowing binding to v4-mapped address on such a socket makes no sense. Signed-off-by: Vlad Yasevich --- net/ipv6/af_inet6.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index fbf533c..7f092fa 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -276,6 +276,13 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) /* Check if the address belongs to the host. */ if (addr_type == IPV6_ADDR_MAPPED) { + /* Binding to v4-mapped address on a v6-only socket + * makes no sense + */ + if (np->ipv6only) { + err = -EINVAL; + goto out; + } v4addr = addr->sin6_addr.s6_addr32[3]; if (inet_addr_type(net, v4addr) != RTN_LOCAL) { err = -EADDRNOTAVAIL;