From patchwork Mon Jun 1 17:54:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224903 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 01197C433DF for ; Mon, 1 Jun 2020 18:54:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D691720885 for ; Mon, 1 Jun 2020 18:54:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591037649; bh=CF/6RAc/H1vUJ3Q0XZsd6asmMAfIVyfNxYNu0uUyfrg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OiUh3EXjtoZcuMWS+sFE+06EqhY91BL4QVIGICqoTJd9amilqwEAzYSou/hKj3lFT MT+QVhyOPHgHOhYHZ0zHl7Qf27mpNSIbNNC6LwO8O/KRSj1bSLhgXsH+PzIM8PNTmb Co1+1U+kr50j5uu3BxqcXESJ4ZYMTYxjzN+NhmNQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729901AbgFASCO (ORCPT ); Mon, 1 Jun 2020 14:02:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:45318 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729900AbgFASCN (ORCPT ); Mon, 1 Jun 2020 14:02:13 -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 286D32073B; Mon, 1 Jun 2020 18:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591034532; bh=CF/6RAc/H1vUJ3Q0XZsd6asmMAfIVyfNxYNu0uUyfrg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mxq0QpMMFoHxw8ajjBfdsLwEZEfnkin+MJ04ha2eUam+LoxeiBldYbODmh9qDQZTw nEdRZTVJ3mqv87dgG+Z1XJMDX1e1QnVxTKuVOO/gsuzRRET2yhGsOJHmlaCSkO2lIv RtnzBg53wu0z44Tbec8JQvjYv+G0cC3KGDgRtsm8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Howells , Guenter Roeck Subject: [PATCH 4.14 74/77] rxrpc: Fix transport sockopts to get IPv4 errors on an IPv6 socket Date: Mon, 1 Jun 2020 19:54:19 +0200 Message-Id: <20200601174029.015066757@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200601174016.396817032@linuxfoundation.org> References: <20200601174016.396817032@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: David Howells commit 37a675e768d7606fe8a53e0c459c9b53e121ac20 upstream. It seems that enabling IPV6_RECVERR on an IPv6 socket doesn't also turn on IP_RECVERR, so neither local errors nor ICMP-transported remote errors from IPv4 peer addresses are returned to the AF_RXRPC protocol. Make the sockopt setting code in rxrpc_open_socket() fall through from the AF_INET6 case to the AF_INET case to turn on all the AF_INET options too in the AF_INET6 case. Fixes: f2aeed3a591f ("rxrpc: Fix error reception on AF_INET6 sockets") Signed-off-by: David Howells Cc: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- net/rxrpc/local_object.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -134,10 +134,10 @@ static int rxrpc_open_socket(struct rxrp } switch (local->srx.transport.family) { - case AF_INET: - /* we want to receive ICMP errors */ + case AF_INET6: + /* we want to receive ICMPv6 errors */ opt = 1; - ret = kernel_setsockopt(local->socket, SOL_IP, IP_RECVERR, + ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR, (char *) &opt, sizeof(opt)); if (ret < 0) { _debug("setsockopt failed"); @@ -145,19 +145,22 @@ static int rxrpc_open_socket(struct rxrp } /* we want to set the don't fragment bit */ - opt = IP_PMTUDISC_DO; - ret = kernel_setsockopt(local->socket, SOL_IP, IP_MTU_DISCOVER, + opt = IPV6_PMTUDISC_DO; + ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_MTU_DISCOVER, (char *) &opt, sizeof(opt)); if (ret < 0) { _debug("setsockopt failed"); goto error; } - break; - case AF_INET6: + /* Fall through and set IPv4 options too otherwise we don't get + * errors from IPv4 packets sent through the IPv6 socket. + */ + + case AF_INET: /* we want to receive ICMP errors */ opt = 1; - ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR, + ret = kernel_setsockopt(local->socket, SOL_IP, IP_RECVERR, (char *) &opt, sizeof(opt)); if (ret < 0) { _debug("setsockopt failed"); @@ -165,8 +168,8 @@ static int rxrpc_open_socket(struct rxrp } /* we want to set the don't fragment bit */ - opt = IPV6_PMTUDISC_DO; - ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_MTU_DISCOVER, + opt = IP_PMTUDISC_DO; + ret = kernel_setsockopt(local->socket, SOL_IP, IP_MTU_DISCOVER, (char *) &opt, sizeof(opt)); if (ret < 0) { _debug("setsockopt failed");