From patchwork Thu Dec 9 15:37:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antony Antony X-Patchwork-Id: 12666837 X-Patchwork-Delegate: kuba@kernel.org 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 43420C433EF for ; Thu, 9 Dec 2021 15:38:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240271AbhLIPmK (ORCPT ); Thu, 9 Dec 2021 10:42:10 -0500 Received: from a.mx.secunet.com ([62.96.220.36]:54424 "EHLO a.mx.secunet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240836AbhLIPld (ORCPT ); Thu, 9 Dec 2021 10:41:33 -0500 Received: from localhost (localhost [127.0.0.1]) by a.mx.secunet.com (Postfix) with ESMTP id 55F8E204E0; Thu, 9 Dec 2021 16:37:58 +0100 (CET) X-Virus-Scanned: by secunet Received: from a.mx.secunet.com ([127.0.0.1]) by localhost (a.mx.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id m1Y7_G3wzJhZ; Thu, 9 Dec 2021 16:37:57 +0100 (CET) Received: from mailout1.secunet.com (mailout1.secunet.com [62.96.220.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by a.mx.secunet.com (Postfix) with ESMTPS id B7F6F2019D; Thu, 9 Dec 2021 16:37:57 +0100 (CET) Received: from cas-essen-02.secunet.de (unknown [10.53.40.202]) by mailout1.secunet.com (Postfix) with ESMTP id A8AAB80004A; Thu, 9 Dec 2021 16:37:57 +0100 (CET) Received: from mbx-essen-02.secunet.de (10.53.40.198) by cas-essen-02.secunet.de (10.53.40.202) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Thu, 9 Dec 2021 16:37:57 +0100 Received: from moon.secunet.de (172.18.149.1) by mbx-essen-02.secunet.de (10.53.40.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Thu, 9 Dec 2021 16:37:56 +0100 Date: Thu, 9 Dec 2021 16:37:50 +0100 From: Antony Antony To: Steffen Klassert CC: Eyal Birger , Herbert Xu , Antony Antony , "David S. Miller" , Jakub Kicinski , Subject: [PATCH 2/2] xfrm: state and policy should fail if XFRMA_IF_ID 0 Message-ID: <7b0d10bb577794138b97fe365ba0cc0bdce6f057.1639064232.git.antony.antony@secunet.com> Reply-To: References: <0bfebd4e5f317cbf301750d5dd5cc706d4385d7f.1639064232.git.antony.antony@secunet.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <0bfebd4e5f317cbf301750d5dd5cc706d4385d7f.1639064232.git.antony.antony@secunet.com> Organization: secunet X-ClientProxiedBy: cas-essen-02.secunet.de (10.53.40.202) To mbx-essen-02.secunet.de (10.53.40.198) X-EXCLAIMER-MD-CONFIG: 2c86f778-e09b-4440-8b15-867914633a10 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org xfrm ineterface does not allow xfrm if_id = 0 fail to create or update xfrm state and policy. With this commit: ip xfrm policy add src 192.0.2.1 dst 192.0.2.2 dir out if_id 0 RTNETLINK answers: Invalid argument ip xfrm state add src 192.0.2.1 dst 192.0.2.2 proto esp spi 1 \ reqid 1 mode tunnel aead 'rfc4106(gcm(aes))' \ 0x1111111111111111111111111111111111111111 96 if_id 0 RTNETLINK answers: Invalid argument Signed-off-by: Antony Antony --- net/xfrm/xfrm_user.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 064f91cd2f01..3e5fb1648be3 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -626,8 +626,13 @@ static struct xfrm_state *xfrm_state_construct(struct net *net, xfrm_smark_init(attrs, &x->props.smark); - if (attrs[XFRMA_IF_ID]) + if (attrs[XFRMA_IF_ID]) { x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); + if (!x->if_id) { + err = -EINVAL; + goto error; + } + } err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]); if (err) @@ -1418,8 +1423,13 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, mark = xfrm_mark_get(attrs, &m); - if (attrs[XFRMA_IF_ID]) + if (attrs[XFRMA_IF_ID]) { if_id = nla_get_u32(attrs[XFRMA_IF_ID]); + if (!if_id) { + err = -EINVAL; + goto out_noput; + } + } if (p->info.seq) { x = xfrm_find_acq_byseq(net, mark, p->info.seq); @@ -1732,8 +1742,13 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_us xfrm_mark_get(attrs, &xp->mark); - if (attrs[XFRMA_IF_ID]) + if (attrs[XFRMA_IF_ID]) { xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); + if (!xp->if_id) { + err = -EINVAL; + goto error; + } + } return xp; error: