From owner-freebsd-net@freebsd.org Sun Jan 8 18:48:18 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 43CA3CA5A46 for ; Sun, 8 Jan 2017 18:48:18 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-pf0-x232.google.com (mail-pf0-x232.google.com [IPv6:2607:f8b0:400e:c00::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 14A81177B for ; Sun, 8 Jan 2017 18:48:18 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: by mail-pf0-x232.google.com with SMTP id f144so15325164pfa.2 for ; Sun, 08 Jan 2017 10:48:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=jEaeCAoPN1Hn+gI5AsBM4y9nnLI1FxOH49Wv/WvjEnM=; b=odb7ar/TZ+k4VqFki2poCm4qwvRmgtkzdon0tXX5Yow98FmpSgZ2f3z7tHQ2r5xfnO uXivTyxSATH6XVsCiOGX39DHtV2nlNxh6rJwMnlMA9bxcHrdEmOjthUNmDPvujBgcNSf //rr8huhnRNCXoZl0UCT5/ARFW9gf7xCLy9UMJVZrTZEp7aJvLyU3LlNsvo4hHKA39dO xlRblNFkBpZLZHhHnr8SaIoZqdhp8R+aTAHqPGbbKdoDZjQktfIogd7ptdtcCmaFQy1q 2Yb1mgI1HCuUCO62njjvQbGZ3A9SvCP75uADAcPFKueQJOVIjI8QrZbzFLwargk1UxT7 Hnaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=jEaeCAoPN1Hn+gI5AsBM4y9nnLI1FxOH49Wv/WvjEnM=; b=on3Fi3xvaKyDjgpUiieOb0dYwkQuv+1F/ciqIsJ7eX2doW7347QWf66Te5UD0X0FLK ZT/NnLKWSSDoRJ3Yi+ZAA83cwDT/LwtfT+pbNuZjyeLWqijzl3s9AdZL4tSgp0b+LlVM mRIa84gHS6bwFjak/1syjCkWbYRYOd7uRqx2rJ3fUQz7NDQ4vwItxkG2sPEpNeVzUEVk C9QLAPQaWRAQz9f71tCNXeKzOOC2IFQay4SE+86fbUpH6Vf0u8Fcch/7CElT0t2e7+lJ 6WkG58m2UVNopjCuEvKMWPS5jk3LB0eB7CARYbKAlQnwkK1byXXEyZKFmzcWxKIc4lPh aYrw== X-Gm-Message-State: AIkVDXJLTSxSRRia1PrMrBP6xPfj8c82wzAd31WYvthLJlZmLZWpPOrq8NVFlXsK87UHyg== X-Received: by 10.84.238.201 with SMTP id l9mr44860749pln.168.1483901297750; Sun, 08 Jan 2017 10:48:17 -0800 (PST) Received: from raichu ([2604:4080:1102:0:ca60:ff:fe9d:3963]) by smtp.gmail.com with ESMTPSA id e1sm158841146pga.37.2017.01.08.10.48.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 08 Jan 2017 10:48:17 -0800 (PST) Sender: Mark Johnston Date: Sun, 8 Jan 2017 10:48:15 -0800 From: Mark Johnston To: Jim Cc: freebsd-net@freebsd.org Subject: Re: Panic in nd6_prefix_offlink() Message-ID: <20170108184815.GB34440@raichu> References: <20170107201119.22d9ceff88e935c2b3f072a1@bitmessage.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170107201119.22d9ceff88e935c2b3f072a1@bitmessage.ch> User-Agent: Mutt/1.7.2 (2016-11-26) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Jan 2017 18:48:18 -0000 On Sat, Jan 07, 2017 at 08:11:19PM +0100, Jim wrote: > Hello, > > I observe frequent crashes on Beagle Bone Black running CURRENT r311106 at home. > My home LAN is connected to DSL provider. The CPE router gets assigned IPv6 address (ds-lite) and advertises prefix/route to the LAN. > Every night the DSL connection is terminated by provider. Upon connection is reestablished the new IPv6 prefix is assigned to router and then advertised to LAN. > This event seems to cause kernel panic on Beagelebone board which goes to db> prompt. > > Backtrace shows: nd6_timer() -> nd6_prefix_offlink() -> witness_assert() -> vpanic() > Here is the backtrace: Thanks for the report. This should be addressed by r311695.