FreeBSD 9 as PPPoE BRAS(mpd 5.7) kernel panic

[Adrian Chadd]

They're NULL pointer derferences, so it's likely a race condition with
some other thread destroying something and setting the pointer value
to NULL somewhere.

I thought this was a reasonably well known problem? Was it ever fixed
in 10/head?


-a


On 22 June 2014 11:00, Alex Ros <noc at hostelnet.ru> wrote:
> Hello.
> We have a problem with FreeBSD 9 stable (currently on r267070) as PPPoE BRAS
> by mpd 5.7. Server catches 1-3 kernel panics every month.
> Two last core.txt's:
> http://pkg.hostelnet.ru/pub/dump/core.txt.7.txt (r262224)
> and
> http://pkg.hostelnet.ru/pub/dump/core.txt.8.txt (r267070)
> Now trying to test hint with mpd-down script from similar trhread:
> http://lists.freebsd.org/pipermail/freebsd-net/2014-June/038952.html
> Hardware: HP DL360 with Intel 82571EB nic.
> Average load on server: 150-300 Mbit/s and around 150 users.
> FreeBSD configuration:
> running on GENERIC kernel
> IPFW with few rules (no dummynet, no nat)
> routing via OSPF (quagga)
>
> cat /boot/loader.conf
> net.isr.maxthreads=2
> net.isr.numthreads=2
> net.graph.maxdata=65536
> net.graph.maxalloc=65536
> net.isr.defaultqlimit=4096
> net.link.ifqmaxlen=10240
>
> cat /etc/sysctl.conf
> net.inet.ip.fastforwarding=1
> net.inet.ip.redirect=0
> kern.random.sys.harvest.ethernet=0
> kern.random.sys.harvest.point_to_point=0
> kern.random.sys.harvest.interrupt=0
> net.inet.raw.maxdgram=16384
> net.inet.raw.recvspace=16384
> net.inet.ip.intr_queue_maxlen=10240
> net.route.netisr_maxqlen=4096
>
> Maybe someone can help to understand: it is a configuration error or a bug
> MPD/netgraph?
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