From owner-freebsd-virtualization@FreeBSD.ORG Tue Dec 9 17:42:51 2014 Return-Path: Delivered-To: freebsd-virtualization@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 25E50887; Tue, 9 Dec 2014 17:42:51 +0000 (UTC) Received: from mail-vc0-x22b.google.com (mail-vc0-x22b.google.com [IPv6:2607:f8b0:400c:c03::22b]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CD465833; Tue, 9 Dec 2014 17:42:50 +0000 (UTC) Received: by mail-vc0-f171.google.com with SMTP id hy4so525717vcb.16 for ; Tue, 09 Dec 2014 09:42:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=TSqQhL9dlY/PkyGkebVGMyCjUfm7BhjGQ/km6FO8VbI=; b=NpnWBCtyZYGDWfMYsebfmLynBEQJ1lRKum/+IaGaVc5uOngbJySoIZA0LZr0OAbTXq d5THDcvFOmhSNJsBjus3ABUERr9NCzZmFtgeDBP61L88O5cyJwWj3qo0lWiOxvk++1CB ob9x4h/G5prh9S9vFdvHDS1U8ygC4q774Bbcvq+cPl0NwjOIS78OGHag6wenbdocdAJ6 +2qQdiz+6Pg83Jl37QQYd8MYj3MwH4zYiiJL1L/vQ6KbUfp/yntBMDlTbfXyLPCfyYDX MkzqCjAmu8gz+AC7dnWm4SqoUYJlsKwJDxw+LOC0LD6T7XloT/TiafdOfZUlwJAZB4nm LH3g== MIME-Version: 1.0 X-Received: by 10.52.247.162 with SMTP id yf2mr1454494vdc.43.1418146969939; Tue, 09 Dec 2014 09:42:49 -0800 (PST) Received: by 10.52.178.73 with HTTP; Tue, 9 Dec 2014 09:42:49 -0800 (PST) In-Reply-To: <5487340A.7040208@freebsd.org> References: <1418081692.1493.2.camel@gmail.com> <1418088637.1493.4.camel@gmail.com> <5487340A.7040208@freebsd.org> Date: Tue, 9 Dec 2014 12:42:49 -0500 Message-ID: Subject: Re: Bug in virtio-net From: Shawn Webb To: Peter Grehan Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: FreeBSD-current , "freebsd-virtualization@freebsd.org" X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Dec 2014 17:42:51 -0000 On Tue, Dec 9, 2014 at 12:40 PM, Peter Grehan wrote: > Hi Shawn, > > =E2=80=8BI doubt this has anything to do with vtnet. My guess is that >>> netisr_proto[NETISR_ETHER].np_handler(m) is =E2=80=8BNULL for some reas= on. Do >>> you have a dump? >>> >> >> core.txt is attached. I've also uploaded it to the link below in case >> the attachment is scrubbed. >> >> http://0xfeedface.org/~shawn/2014-12-08_2028_core.txt >> > > Is the core dump available ? > > As Bryan mentioned, this is a NULL function pointer deref and not a data > access so is possibly related to corruption of data structures rather tha= n > a bug in the virtio driver. The core dump would be able to point to what > went wrong. > > later, > > Peter. > > Gotcha. I'll see if I can upload it to Google Drive or somewhere. It's 1.6GB in size. I'm assuming just like any other core dump, they can contain sensitive info. I'll ping you both directly with the link when it's uploaded. Please keep sharing it to a minimum. Thanks, Shawn