From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.secunet.com (mx1.secunet.com [62.96.220.36]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA4A83E0086 for ; Wed, 27 May 2026 08:42:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.96.220.36 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779871345; cv=none; b=NlgWmwrotK3ox6FE3FXtMK8e9iRBsYFoZksirgORKW1DA/LdiLs+uWynroBurRXU+2KsVbDzut51WIPVSZSi/Nk09pyXEQo53sdECR4vjZ1zYWC7q7COrIbuJuoP41Hxz0pdYbYhAzC2wabAbNt6VrEwrDXVHYRux0BitTfIMlg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779871345; c=relaxed/simple; bh=T6A5ZpOpTm/4dF52Xuk74SuW6krpdilyDUhtEpGPEew=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qPiK0Il5OTUpuUTYO23TnJvLdDK94+/KL/QDW/gl2FDiFvHgyPbV/agyd42JF7F5u+c+cC3BnUx8txyTl8DNJQY38X77VVOorqHqVd1qfeE5Pkgr0On3LjV+eXFIa9d2lweWaOd2Zy6N/Chlwd7zgYngBV3+vzlzyGBL8f9yF2I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com; spf=pass smtp.mailfrom=secunet.com; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b=YImMVeMi; arc=none smtp.client-ip=62.96.220.36 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=secunet.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b="YImMVeMi" Received: from localhost (localhost [127.0.0.1]) by mx1.secunet.com (Postfix) with ESMTP id 946FD2069C; Wed, 27 May 2026 10:42:13 +0200 (CEST) X-Virus-Scanned: by secunet Received: from mx1.secunet.com ([127.0.0.1]) by localhost (mx1.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IhZ0z-tMBOmI; Wed, 27 May 2026 10:42:11 +0200 (CEST) Received: from EXCH-01.secunet.de (rl1.secunet.de [10.32.0.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.secunet.com (Postfix) with ESMTPS id 30DF12074F; Wed, 27 May 2026 10:42:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.secunet.com 30DF12074F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=secunet.com; s=202301; t=1779871331; bh=1P6PdNJCqe/xzZVKy2Mdn5fV8zN7597TavqYs00A8fU=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=YImMVeMiGNprZ94LWLqaAyxKWheCpz17JUdEDnHOBcczz5HXaV3qlmxkqarZUVrOt 1huou9jqqaVfJXjqWGOAwUU27emcvUBL0YdxWP31QUDX9YU6BUICCi75mRLlu4JG35 83rpuRFxOPhl6uP9kDuNvqfmv+15nFuO0XCVIwozNWCQex8re1teGitBjghyQtKP9/ Lq5c+/9z1hVDBjh8aOQhPx6SkvCMoyJNOiZf+Hxo56zJ6AWtE99sCLJeASeO7u5iYZ pjeRrjJhzjhrKHDxoJzZr3+dC6xodZ+4FuSxQymGdgQ6Yhmpw2aESsutpwL+DvlNDb Tmee/gAaK/rRg== Received: from secunet.com (10.182.7.193) by EXCH-01.secunet.de (10.32.0.171) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.37; Wed, 27 May 2026 10:42:10 +0200 Received: (nullmailer pid 3493988 invoked by uid 1000); Wed, 27 May 2026 08:42:01 -0000 From: Steffen Klassert To: David Miller , Jakub Kicinski CC: Herbert Xu , Steffen Klassert , Subject: [PATCH 1/9] xfrm: route MIGRATE notifications to caller's netns Date: Wed, 27 May 2026 10:41:19 +0200 Message-ID: <20260527084148.3489759-2-steffen.klassert@secunet.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260527084148.3489759-1-steffen.klassert@secunet.com> References: <20260527084148.3489759-1-steffen.klassert@secunet.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EXCH-04.secunet.de (10.32.0.184) To EXCH-01.secunet.de (10.32.0.171) From: Maoyi Xie xfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate() in net/key/af_key.c both hardcode &init_net for the multicast that announces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE. XFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the rest of the xfrm/af_key netlink path was made netns-aware in 2008. The other 14 multicast paths in xfrm_user.c route their event using xs_net(x), xp_net(xp) or sock_net(skb->sk); only the migrate path was missed. Two consequences of the init_net hardcoding: 1. The notification (selector, old/new endpoint addresses, and the km_address) is delivered to listeners on init_net's XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on the issuing netns. An IKE daemon running in init_net therefore receives migration notifications originating from any other netns on the host. 2. An IKE daemon running inside a non-init netns and subscribed to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the notification of its own migration. IKEv2 MOBIKE / address-update handling inside a netns is silently broken. Thread struct net through km_migrate() and the xfrm_mgr.migrate function pointer, drop the &init_net override in xfrm_send_migrate() and pfkey_send_migrate(), and pass the caller's net (already in scope in xfrm_migrate() via sock_net(skb->sk)) all the way down. struct xfrm_mgr is in-tree only and not exported as a stable API, so the function-pointer signature change is internal. pfkey_broadcast() is already netns-aware via net_generic(net, pfkey_net_id) since the pernet conversion. The five other pfkey_broadcast() callers in af_key.c already pass xs_net(x), sock_net(sk) or a per-netns net, so this only removes the &init_net outlier. Fixes: 5c79de6e79cd ("[XFRM]: User interface for handling XFRM_MSG_MIGRATE") Cc: stable@vger.kernel.org # v5.15+ Signed-off-by: Maoyi Xie Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 3 ++- net/key/af_key.c | 6 +++--- net/xfrm/xfrm_policy.c | 2 +- net/xfrm/xfrm_state.c | 4 ++-- net/xfrm/xfrm_user.c | 5 ++--- 5 files changed, 10 insertions(+), 10 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 10d3edde6b2f..874409127e29 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -715,6 +715,7 @@ struct xfrm_mgr { const struct xfrm_migrate *m, int num_bundles, const struct xfrm_kmaddress *k, + struct net *net, const struct xfrm_encap_tmpl *encap); bool (*is_alive)(const struct km_event *c); }; @@ -1891,7 +1892,7 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); #ifdef CONFIG_XFRM_MIGRATE int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap); struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net, u32 if_id); diff --git a/net/key/af_key.c b/net/key/af_key.c index a166a88d8788..9cffeef18cd9 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -3564,7 +3564,7 @@ static int set_ipsecrequest(struct sk_buff *skb, #ifdef CONFIG_NET_KEY_MIGRATE static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap) { int i; @@ -3669,7 +3669,7 @@ static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, } /* broadcast migrate message to sockets */ - pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net); + pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, net); return 0; @@ -3680,7 +3680,7 @@ static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, #else static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_bundles, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap) { return -ENOPROTOOPT; diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index c944327ce66c..59968dcbafe1 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -4703,7 +4703,7 @@ int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, } /* Stage 5 - announce */ - km_migrate(sel, dir, type, m, num_migrate, k, encap); + km_migrate(sel, dir, type, m, num_migrate, k, net, encap); xfrm_pol_put(pol); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 686014d39429..395d82411a87 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -2837,7 +2837,7 @@ EXPORT_SYMBOL(km_policy_expired); #ifdef CONFIG_XFRM_MIGRATE int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap) { int err = -EINVAL; @@ -2848,7 +2848,7 @@ int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, list_for_each_entry_rcu(km, &xfrm_km_list, list) { if (km->migrate) { ret = km->migrate(sel, dir, type, m, num_migrate, k, - encap); + net, encap); if (!ret) err = ret; } diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 38a90e5ee3d9..71a4b7278eba 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -3271,10 +3271,9 @@ static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap) { - struct net *net = &init_net; struct sk_buff *skb; int err; @@ -3292,7 +3291,7 @@ static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, #else static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, - const struct xfrm_kmaddress *k, + const struct xfrm_kmaddress *k, struct net *net, const struct xfrm_encap_tmpl *encap) { return -ENOPROTOOPT; -- 2.43.0