From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: David Ahern <dsa@cumulusnetworks.com>
Cc: Richard Alpe <richard.alpe@ericsson.com>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [linux-next] oops in ip_route_input_noref
Date: Thu, 17 Sep 2015 08:47:38 +0900 [thread overview]
Message-ID: <20150916234738.GA592@swordfish> (raw)
In-Reply-To: <55F9699E.5080807@cumulusnetworks.com>
On (09/16/15 07:07), David Ahern wrote:
> Hi Sergey:
>
Hi,
sorry for long reply. Baremetal. So grabbing the backtrace is
a bit complicated. But it looks very close to what Richard Alpe
has posted.
in IRQ
RIP is at ip_route_input_noref
[ 0.877597] [<ffffffff8158e13c>] arp_process+0x39c/0x690
[ 0.877597] [<ffffffff8158e57e>] arp_rcv+0x13e/0x170
-ss
> Is this with KVM or baremetal?
>
> -----8<-----
> thanks for the analysis
>
> >>addr2line -e vmlinux -i 0xffffffff8146c0b1
> >>net/ipv4/route.c:1815
> >>net/ipv4/route.c:1905
> >>
> >>
> >>which seems to be this line ip_route_input_noref()->ip_route_input_slow():
> >>...
> >>1813 rth->rt_is_input = 1;
> >>1814 if (res.table)
> >>1815 rth->rt_table_id = res.table->tb_id;
> >>1816
> >>...
> >>
> >>
> >>added by b7503e0cdb5dbec5d201aa69d8888c14679b5ae8
> >>
> >> net: Add FIB table id to rtable
> >>
> >> Add the FIB table id to rtable to make the information available for
> >> IPv4 as it is for IPv6.
> >>
> >>
> >> -ss
>
> Hi Richard:
>
> >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: [<ffffffff8155b5e2>] 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.
>
> Thanks,
> David
>
>
next prev parent reply other threads:[~2015-09-16 23:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-16 9:24 [linux-next] oops in ip_route_input_noref Sergey Senozhatsky
2015-09-16 11:50 ` Richard Alpe
2015-09-16 13:07 ` David Ahern
2015-09-16 13:53 ` Richard Alpe
2015-09-16 13:57 ` David Ahern
2015-09-16 14:08 ` Richard Alpe
2015-09-16 13:59 ` Richard Alpe
2015-09-16 14:00 ` David Ahern
2015-09-16 23:47 ` Sergey Senozhatsky [this message]
2015-09-17 7:26 ` Tomeu Vizoso
2015-09-16 13:24 ` David Ahern
2015-09-16 15:00 ` Fabio Estevam
2015-09-16 15:04 ` David Ahern
2015-09-17 8:58 ` Thierry Reding
2015-09-18 23:06 ` Andrew Morton
2015-09-19 14:34 ` David Ahern
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