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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 D578BC5CFC0 for ; Mon, 18 Jun 2018 15:02:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 853E8208A6 for ; Mon, 18 Jun 2018 15:02:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 853E8208A6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=vt.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965273AbeFRPC6 (ORCPT ); Mon, 18 Jun 2018 11:02:58 -0400 Received: from outbound.smtp.vt.edu ([198.82.183.121]:32994 "EHLO omr1.cc.vt.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S964900AbeFRPCy (ORCPT ); Mon, 18 Jun 2018 11:02:54 -0400 Received: from mr2.cc.vt.edu (mr2.cc.ipv6.vt.edu [IPv6:2607:b400:92:8400:0:90:e077:bf22]) by omr1.cc.vt.edu (8.14.4/8.14.4) with ESMTP id w5IF2r0O016998 for ; Mon, 18 Jun 2018 11:02:53 -0400 Received: from mail-qt0-f197.google.com (mail-qt0-f197.google.com [209.85.216.197]) by mr2.cc.vt.edu (8.14.7/8.14.7) with ESMTP id w5IF2mW9007880 for ; Mon, 18 Jun 2018 11:02:53 -0400 Received: by mail-qt0-f197.google.com with SMTP id a10-v6so14240493qtp.2 for ; Mon, 18 Jun 2018 08:02:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:mime-version :content-transfer-encoding:date:message-id; bh=gTngdsnTIWkpwQrxeB+eUkUpfINsJa5xPAcnZ/o1vzg=; b=du4lN+4/VVV3U3HeNvo2+2yXkVnVPnt/WwPZbf8InM2h4fgT8t3ypLyVIFLb2bQ7Qu TuuZO1hDbNfxekDnhpGkBXhzdX1WCrwxQnAZVhW86psxS5BGoQGdcUSDSA4MYvJf/AOW V3IB9QUaokAyK68Xla3P/tcyJsBqA/5NL9BUOWoutR/e5G0Gd2iEZtsBOPwQjQmIcCmP mAAnEZ04Clwy+Kz4nSzc4oP6C1gKBjPlfjl5z9tzyf6PVfcn7AT27HXdOVQHKlKqKyY5 Q5qAxbu96CClZUfcthgvDgan1Rc+Oj3poJeh9A9p3bYgs9DTKMwgVJPtWEcULhKPIeOE 1Nkg== X-Gm-Message-State: APt69E0cb1k/yJ+JErNC4KdazTqopOUMenaZxPKVYiFV00L69AINSoTK Yuy9P/LPPQu9xEBziHfUHcOEndgD0cZSPO4r8nRF/8+wIaOPh20xr/gCnX585O1K52yTIdH80kw HAV5UKcN9Erf9vBAT6bIMk+eVdQ0DfYwYOu4= X-Received: by 2002:a37:99c3:: with SMTP id b186-v6mr10453403qke.261.1529334168537; Mon, 18 Jun 2018 08:02:48 -0700 (PDT) X-Google-Smtp-Source: ADUXVKJKhGEdVzQGK3tcpVb/UsceUSefpHBBpl9+8T3W/bL+AB7ZJiwYTTu1jfEAPY/rkugcGKyhsg== X-Received: by 2002:a37:99c3:: with SMTP id b186-v6mr10453384qke.261.1529334168281; Mon, 18 Jun 2018 08:02:48 -0700 (PDT) Received: from turing-police.cc.vt.edu ([2607:b400:24:0:3d62:c4f9:2f6a:b486]) by smtp.gmail.com with ESMTPSA id t6-v6sm9250085qtn.86.2018.06.18.08.02.46 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 18 Jun 2018 08:02:46 -0700 (PDT) X-Mailer: exmh version 2.8.0 04/21/2017 with nmh-1.7+dev From: valdis.kletnieks@vt.edu To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: 4.14.(44->48) IPv6 RA issue? Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1529334166_20151P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Mon, 18 Jun 2018 11:02:46 -0400 Message-ID: <35958.1529334166@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1529334166_20151P Content-Type: text/plain; charset=us-ascii So I'm trying to troubleshoot an issue on an OpenWRT/Lede based router, where IPv6 connectivity totally fails. I've bisected it down to: git log --oneline 187da94808a634477b5e5a69109ea0c566dfa64b..73d8a6ab7668173d70adbed45b61be5256c505e 73d8a6ab7668 (refs/bisect/bad) base-files: fix UCI config parsing and callback handling e52f3e9b1376 kernel: bump 4.14 to 4.14.48 7590c3c58f5e (HEAD) scripts: Replace obsolete POSIX tmpnam in slugimage.pl with File::Temp function 987900f2de76 hostapd: properly build hostapd-only SSL variants and am pretty sure that it's the kernel bump (works with a 4.14.44 kernel, breaks with 4.14.48) as the other 3 commits don't go anywhere near IPv6 handling. Symptoms: With a good kernel, 'ip -6 neigh' reports: ip -6 neigh 2601:5c0:c001:4341:2116:22ff:b17b:7cd6 dev wlan1 lladdr bc:85:56:1f:4f:6d REACHABLE fe80::201:5cff:fe6f:1a46 dev eth1 lladdr 00:01:5c:6f:1a:46 router REACHABLE fe80::9325:3b21:5021:fbd8 dev eth0 lladdr b8:27:eb:f7:0b:20 REACHABLE fe80::2d9:d1ff:fed9:51a3 dev eth0 lladdr 00:d9:d1:d9:51:a3 REACHABLE With a bad one, I get: ip -6 neigh fe80::be85:56ff:fe1f:4f6d dev wlan1 lladdr bc:85:56:1f:4f:6d STALE fe80::2d9:d1ff:fed9:51a3 dev eth0 lladdr 00:d9:d1:d9:51:a3 STALE fe80::9325:3b21:5021:fbd8 dev eth0 lladdr b8:27:eb:f7:0b:20 DELAY 2601:5c0:c001:4341:2116:22ff:b17b:7cd6 dev wlan1 lladdr bc:85:56:1f:4f:6d REACHABLE fe80::201:5cff:fe6f:1a46 dev eth1 INCOMPLETE Note that eth1 is the uplink towards my ISP. I've pointed a 'tcpdump -n -i eth1 ip6' at it, and see plenty of RA packets come in, but neighbor discovery never completes. Looking at the Changelogs for .45->.50 don't show any smoking-gun patches. This ring any bells, before I delve deeper into it? --==_Exmh_1529334166_20151P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.8.0 04/21/2017 iQEVAwUBWyfJlo0DS38y7CIcAQJqRAf+Iy4OXUxuBVdMttqWqg8n4FMRa7fxLASq LYTDD/3tgv8K25J5JquZxQxbAymUGaka1y2GAgLGKaujllOU/Hu4rVFJ+b0DW443 tYC4D56XR7kE45tGG1qnqg9GaTxie2XrXdi5rFGaGXgkoKHTzOUN7FC4aoki1TIa 1vbee9iCatuuQQe1mjwRaZIytptek7pXbj5cBhAgzGLLqDkBfrzJC0EBLtUs8l/k zKslRjFhIG3wVpDvk8gYxE+jpNkUdoDijrnflkFkmc5cs8ol74aLaNvCZfIhcoUm Ik/BU7rOdy04XaGaX7QAf/aUhS5hFWJYuHrDxAu2cq5Ap6kfw7Taiw== =fa0F -----END PGP SIGNATURE----- --==_Exmh_1529334166_20151P--