From owner-freebsd-stable@freebsd.org Fri Aug 12 00:48:23 2016 Return-Path: Delivered-To: freebsd-stable@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 55B77BB6236 for ; Fri, 12 Aug 2016 00:48:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 34A031365 for ; Fri, 12 Aug 2016 00:48:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mailman.ysv.freebsd.org (Postfix) id 34022BB6235; Fri, 12 Aug 2016 00:48:23 +0000 (UTC) Delivered-To: stable@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 33AE0BB6233 for ; Fri, 12 Aug 2016 00:48:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-it0-x230.google.com (mail-it0-x230.google.com [IPv6:2607:f8b0:4001:c0b::230]) (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 0EBB91364 for ; Fri, 12 Aug 2016 00:48:22 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-it0-x230.google.com with SMTP id f6so803880ith.0 for ; Thu, 11 Aug 2016 17:48:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=Bacp1Wo/OHj8QQyr9qGMNUcKksw2i5F3PghFxSDrhvc=; b=Bz/co7FyZsjDEYelbhCku+ggDe5rPYWEnXnkp2C1UqO+kzM/0bIRlf/TqBb2OuvtvJ CNv2HaYJ61nnZwKvHxt3BOXXYsVQmc+Ycm/IqtcBjE9H8yKIyeWgtKv+98y8vNDIYvUf wLJ0vWIn/3VJzcfr3YFhjyfaE0CnZGgOT9vlk1CRlnl6dNef8lmxkChKLRiCSQ9tO16W u91dYd4w7L9rMANUxV+CF63BwgToHj7AyaAdvoJtR3MLKQ0343MOnxCkK/0ZzIUkPGox /nrxGWgEzvg2i5+KfblZDK5LtSVYpu7n9KvMw+3IOktg0I+iuBXkwoMiDrcDbIJuZRL/ OWeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=Bacp1Wo/OHj8QQyr9qGMNUcKksw2i5F3PghFxSDrhvc=; b=PHH/bCjxCds/a+gBJPL3RUabNYHs+amSngOLy9vUg2w0EyZjG4LCbQtZ6F97PQhyPo vviasVOqym1cD1EPmnCcwadMyWToRLVIHyaV4daQAIufpV6oEgzYr8dcp2CGb2xRgh63 h7k2LFRxHlwVPeYJAkm5IYZkPpdDMQ1yXrjPLQgkKYOqK9eV11az8pqO4suJ6U2APa+s rhPOLnM3cYqjecCYFVX5ghz4VDamdb9KZwibQfE+M5a/J7nGRLbRhwTnaODufWfuubEy SnfDP9NaiikSUGjJML9AcwVdOBJoX2oCWIKiAFdAqs5iUBrW81Ov4VBch87+KWdKYrNL 1ohw== X-Gm-Message-State: AEkoouvB1G603r3O9UnT2Txcb9NY3AQ6k0+PZ3q5XkTCoujGQgOOUhXBRRVV9/NGaq+z6aXyHWjmNn5vurMnGw== X-Received: by 10.36.73.195 with SMTP id e64mr55119itd.80.1470962902319; Thu, 11 Aug 2016 17:48:22 -0700 (PDT) MIME-Version: 1.0 Received: by 10.36.141.129 with HTTP; Thu, 11 Aug 2016 17:48:21 -0700 (PDT) In-Reply-To: <20160811234250.GC1112@albert.catwhisker.org> References: <20160810165458.GB1112@albert.catwhisker.org> <570bda1e-d4d7-42dc-6037-7c321ba9e97d@FreeBSD.org> <20160811234250.GC1112@albert.catwhisker.org> From: Adrian Chadd Date: Thu, 11 Aug 2016 17:48:21 -0700 Message-ID: Subject: Re: Panic in stable/11 (amd64) @r303903: page fault while in kernel mode To: David Wolfskill , Adrian Chadd , "stable@freebsd.org" Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Aug 2016 00:48:23 -0000 Just pop open the crashdump and "print *ifp" in the last stack frame before trap. -a On 11 August 2016 at 16:42, David Wolfskill wrote: > On Thu, Aug 11, 2016 at 04:37:26PM -0700, Adrian Chadd wrote: >> Eep. Is this anotehr case where there's a race and ifp is NULL or the >> ll pointer for ifp is NULL or use-after-free'd? > > I don't know, but it's the only panic of a similar nature I've seen -- > though since on any given day, I'm usually running FreeBSD freshly-built > that morning, "trends" might be a little more difficult to determine. > >> I remember bumping into these here and there because we don't seem to >> have a well defined lifecycle for lladdr access. ;( > > Well, you're quite welcome to grab the crash data & poke around, or tell > me where to look, and I'll do so..... > >> ... >> >> Gory details (both "normal" and gzipped, and including the crash >> >> dump and crashinfo) are in >> >> . >> ... > > Peace, > david > -- > David H. Wolfskill david@catwhisker.org > Those who would murder in the name of God or prophet are blasphemous cowards. > > See http://www.catwhisker.org/~david/publickey.gpg for my public key.