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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60DD1C54EBF for ; Wed, 4 Jan 2023 16:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239905AbjADQTC (ORCPT ); Wed, 4 Jan 2023 11:19:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239960AbjADQSq (ORCPT ); Wed, 4 Jan 2023 11:18:46 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 681B1F581 for ; Wed, 4 Jan 2023 08:18:45 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 271BBB817AE for ; Wed, 4 Jan 2023 16:18:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F670C433EF; Wed, 4 Jan 2023 16:18:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672849122; bh=d6OhcyYazqXyzw+qHsFSWFxAiQjtxXvb0Gx7abt1C5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ir0SBnEWcMM/FPwXwOKnGsN9qTulq0ppcXkkDbdNOA03Jq55UjkcDNc658s8tvJtS WWerCh5RwqpXOa6/b7SCVeSCVIfHEXsU2lheK10nyjrVeB7dEixv2BSZtht2hOS6ZC 7r8eCq+nv76/vhOwwwbPNzySAuqqL0bxmgIJINRk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mat Martineau , Matthieu Baerts , Jakub Kicinski Subject: [PATCH 6.0 043/177] mptcp: use proper req destructor for IPv6 Date: Wed, 4 Jan 2023 17:05:34 +0100 Message-Id: <20230104160508.955749538@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160507.635888536@linuxfoundation.org> References: <20230104160507.635888536@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Matthieu Baerts commit d3295fee3c756ece33ac0d935e172e68c0a4161b upstream. Before, only the destructor from TCP request sock in IPv4 was called even if the subflow was IPv6. It is important to use the right destructor to avoid memory leaks with some advanced IPv6 features, e.g. when the request socks contain specific IPv6 options. Fixes: 79c0949e9a09 ("mptcp: Add key generation and token tree") Reviewed-by: Mat Martineau Cc: stable@vger.kernel.org Signed-off-by: Matthieu Baerts Signed-off-by: Mat Martineau Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/mptcp/subflow.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -45,7 +45,6 @@ static void subflow_req_destructor(struc sock_put((struct sock *)subflow_req->msk); mptcp_token_destroy_request(req); - tcp_request_sock_ops.destructor(req); } static void subflow_generate_hmac(u64 key1, u64 key2, u32 nonce1, u32 nonce2, @@ -550,6 +549,12 @@ drop: return 0; } +static void subflow_v4_req_destructor(struct request_sock *req) +{ + subflow_req_destructor(req); + tcp_request_sock_ops.destructor(req); +} + #if IS_ENABLED(CONFIG_MPTCP_IPV6) static struct request_sock_ops mptcp_subflow_v6_request_sock_ops __ro_after_init; static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops __ro_after_init; @@ -581,6 +586,12 @@ drop: tcp_listendrop(sk); return 0; /* don't send reset */ } + +static void subflow_v6_req_destructor(struct request_sock *req) +{ + subflow_req_destructor(req); + tcp6_request_sock_ops.destructor(req); +} #endif struct request_sock *mptcp_subflow_reqsk_alloc(const struct request_sock_ops *ops, @@ -1929,8 +1940,6 @@ static int subflow_ops_init(struct reque if (!subflow_ops->slab) return -ENOMEM; - subflow_ops->destructor = subflow_req_destructor; - return 0; } @@ -1938,6 +1947,8 @@ void __init mptcp_subflow_init(void) { mptcp_subflow_v4_request_sock_ops = tcp_request_sock_ops; mptcp_subflow_v4_request_sock_ops.slab_name = "request_sock_subflow_v4"; + mptcp_subflow_v4_request_sock_ops.destructor = subflow_v4_req_destructor; + if (subflow_ops_init(&mptcp_subflow_v4_request_sock_ops) != 0) panic("MPTCP: failed to init subflow v4 request sock ops\n"); @@ -1963,6 +1974,8 @@ void __init mptcp_subflow_init(void) mptcp_subflow_v6_request_sock_ops = tcp6_request_sock_ops; mptcp_subflow_v6_request_sock_ops.slab_name = "request_sock_subflow_v6"; + mptcp_subflow_v6_request_sock_ops.destructor = subflow_v6_req_destructor; + if (subflow_ops_init(&mptcp_subflow_v6_request_sock_ops) != 0) panic("MPTCP: failed to init subflow v6 request sock ops\n");