From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753728AbbIPN5f (ORCPT ); Wed, 16 Sep 2015 09:57:35 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:36599 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752584AbbIPN5d (ORCPT ); Wed, 16 Sep 2015 09:57:33 -0400 Subject: Re: [linux-next] oops in ip_route_input_noref To: Richard Alpe , Sergey Senozhatsky References: <20150916092447.GA945@swordfish> <55F9578C.40209@ericsson.com> <55F9699E.5080807@cumulusnetworks.com> <55F97459.5050408@ericsson.com> Cc: "David S. Miller" , Alexey Kuznetsov , James Morris , netdev@vger.kernel.org, linux-kernel@vger.kernel.org From: David Ahern Message-ID: <55F9754A.1030507@cumulusnetworks.com> Date: Wed, 16 Sep 2015 07:57:30 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <55F97459.5050408@ericsson.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/16/15 7:53 AM, Richard Alpe wrote: >>> I to get an Oops in ip_route_input_noref(). It happens occasionally during bootup. >>> KVM environment using virtio driver. Let me know if you need any additional info or >>> if you want me to try to bisect it. >>> >>> Starting network... >>> ... >>> [ 0.877040] BUG: unable to handle kernel NULL pointer dereference at 0000000000000056 >>> [ 0.877597] IP: [] ip_route_input_noref+0x1a2/0xb00 >> >> Can you send me your kernel config and qemu command line? KVM with virtio networking is a primary test vehicle, and I did not encounter this at all. > Sure thing. Not sure how ppl normally provide files on netdev but I'm just going > to go ahead and paste them here :) An attachment for the config is better than inline. > > $ ps aux | grep kvm > qemu-system-x86_64 -enable-kvm -name tipc-medium-node1 -S -machine pc-0.14,accel=kvm,usb=off -m 1024 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid cdec478a-5f0d-49f1-b25e-fac4ca0b290c -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/tipc-medium-node1.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot order=n,menu=on,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -netdev tap,fd=25,id=hostnet0 -device e1000,netdev=hostnet0,id=net0,mac=00:0f:ff:10:04:01,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:28101 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on > > $ cat .config > # > # Automatically generated file; DO NOT EDIT. > # Linux/x86 3.12.28 Kernel Configuration > # 3.12.28? That should say this for net-next: # Linux/x86 4.2.0 Kernel Configuration Or are you reporting a problem with 3.12.28? David