Messages in this thread | | | Date | Tue, 09 Jan 2007 12:50:11 +0100 | From | Patrick McHardy <> | Subject | Re: [Bug] OOPS with nf_conntrack_ipv6, probably fragmented UDPv6 |
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Bernhard Schmidt wrote: > Patrick McHardy wrote: > >>> I've hit another kernel oops with 2.6.20-rc3 on i386 platform. It is >>> reproducible, as soon as I load nf_conntrack_ipv6 and try to send >>> something large (scp or so) inside an OpenVPN tunnel on my client >>> (patched with UDPv6 transport) the router (another box) OOPSes. >>> >>> tcpdump suggests the problem appears as soon as my client sends >>> fragmented UDPv6 packets towards the destination. It does not happen >>> when nf_conntrack_ipv6 is not loaded. This is the OOPS as dumped from >>> the serial console: >> >> Does this patch help? > > > Yes, seems to be working fine.
Thanks, I'll send it upstream tonight.
> Can you tell since when this bug is in the kernel?
The real bug is in nf_conntrack and probably has been there since the beginning (which I think is about 1.5 years ago). It blows up in combination with the GSO code, which I believe was added in 2.6.18-rc, but it might have caused troubles somewhere else before.
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