From owner-freebsd-net@freebsd.org Wed Jun 3 21:16:01 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id F28262F36BE for ; Wed, 3 Jun 2020 21:16:01 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 49chXd50Tzz3TRy for ; Wed, 3 Jun 2020 21:16:01 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: by mailman.nyi.freebsd.org (Postfix) id AB9682F36BD; Wed, 3 Jun 2020 21:16:01 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AB5EA2F3453 for ; Wed, 3 Jun 2020 21:16:01 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mx1.sbone.de (mx1.sbone.de [IPv6:2a01:4f8:13b:39f::9f:25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mx1.sbone.de", Issuer "SBone.DE" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 49chXc3vFGz3TQH for ; Wed, 3 Jun 2020 21:16:00 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mail.sbone.de (mail.sbone.de [IPv6:fde9:577b:c1a9:31::2013:587]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mx1.sbone.de (Postfix) with ESMTPS id 8399F8D4A166; Wed, 3 Jun 2020 21:15:57 +0000 (UTC) Received: from content-filter.sbone.de (content-filter.sbone.de [IPv6:fde9:577b:c1a9:31::2013:2742]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPS id 12C09E7080F; Wed, 3 Jun 2020 21:15:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at sbone.de Received: from mail.sbone.de ([IPv6:fde9:577b:c1a9:31::2013:587]) by content-filter.sbone.de (content-filter.sbone.de [fde9:577b:c1a9:31::2013:2742]) (amavisd-new, port 10024) with ESMTP id 9BMyTGGoAp6d; Wed, 3 Jun 2020 21:15:54 +0000 (UTC) Received: from [169.254.19.139] (unknown [IPv6:fde9:577b:c1a9:4902:fd9b:760b:5aec:919e]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPSA id 6EFD3E7080B; Wed, 3 Jun 2020 21:15:54 +0000 (UTC) From: "Bjoern A. Zeeb" To: "Alexander V. Chernikov" Cc: "FreeBSD Net" Subject: Re: panic: starting DAD on non-tentative address 0xfffff800034a5800, Date: Wed, 03 Jun 2020 21:15:53 +0000 X-Mailer: MailMate (2.0BETAr6146) Message-ID: <1161CE2A-5128-4056-BB87-6D2D7B1CBAD3@lists.zabbadoz.net> In-Reply-To: <354051591215122@mail.yandex.ru> References: <354051591215122@mail.yandex.ru> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 49chXc3vFGz3TQH X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of bzeeb-lists@lists.zabbadoz.net designates 2a01:4f8:13b:39f::9f:25 as permitted sender) smtp.mailfrom=bzeeb-lists@lists.zabbadoz.net X-Spamd-Result: default: False [-2.67 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_FIVE(0.00)[5]; NEURAL_HAM_MEDIUM(-1.01)[-1.012]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a01:4f8:13b:39f::9f:25]; NEURAL_HAM_LONG(-1.06)[-1.064]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[zabbadoz.net]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; NEURAL_HAM_SHORT(-0.30)[-0.298]; RCPT_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; RCVD_TLS_LAST(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jun 2020 21:16:02 -0000 On 3 Jun 2020, at 20:15, Alexander V. Chernikov wrote: > 03.06.2020, 11:46, "Bjoern A. Zeeb" : >> Hi, >> >> got this with HEAD from a few days ago, just in case it rings a bell >> with someone. > I'm curious what are the conditions. Was it the first "up" for the > interface? > It looks like we're not locking anything in nd6_dad_timer, so > potentially if one configures IPv6 address, waits for most of the dad > timer, then do down/up, this can potentially happen. I cannot really say. I plugged an unsupported interface into USB; there were two other wifi dongles on the USB hub. When I came back to the machine console later in the day, I found this. Not sure if it was related. >> Otherwise I’ll go investigate when it happens again; I’ll try to >> setup netdump to get more information. >> >> panic: starting DAD on non-tentative address 0xfffff800034a5800 >> cpuid = 1 >> time = 1500939739 >> KDB: stack backtrace: >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame >> 0xfffffe003b65a690 >> vpanic() at vpanic+0x182/frame 0xfffffe003b65a6e0 >> panic() at panic+0x43/frame 0xfffffe003b65a740 >> nd6_dad_start() at nd6_dad_start+0x3bb/frame 0xfffffe003b65a7e0 >> in6_if_up() at in6_if_up+0x62/frame 0xfffffe003b65a820 >> if_up() at if_up+0x69/frame 0xfffffe003b65a850 >> ifhwioctl() at ifhwioctl+0xbf8/frame 0xfffffe003b65a8d0 >> ifioctl() at ifioctl+0x3ac/frame 0xfffffe003b65a9a0 >> kern_ioctl() at kern_ioctl+0x27b/frame 0xfffffe003b65aa00 >> sys_ioctl() at sys_ioctl+0x127/frame 0xfffffe003b65aad0 >> amd64_syscall() at amd64_syscall+0x140/frame 0xfffffe003b65abf0 >> fast_syscall_common() at fast_syscall_common+0x101/frame >> 0xfffffe003b65abf0 >> --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80047cd8a, rsp = >> 0x7fffffffe258, rbp = 0x7fffffffe2b0 --- >> KDB: enter: panic >> [ thread pid 12247 tid 100088 ] >> Stopped at kdb_enter+0x37: movq $0,0x10c9ad6(%rip) >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to >> "freebsd-net-unsubscribe@freebsd.org"