Patrick McHardy <[email protected]> writes:
> Linus Torvalds wrote:
> > On Sun, 7 Jan 2007, Peter Osterlund wrote:
> >
> >>I get kernel panics when doing large ethernet transfers. A loop doing
> >> EFALLGS: 00010206 (2.6.20-rc4 #13)
> >> EIP is at ipv4_conntrack_help+0x6b/0x83
> >> eax: c0475e44 ebx: 9f5cea37 ecx: d1dcebb0 edx: 00000014
> >> esi: d1dcebb0 edi: c0475e44 ebp: c0475dd8 esp: c0475dc4
> >
> > which is ipv4_conntrack_help():
> >
> > return help->helper->help(pskb,
> > (*pskb)->nh.raw - (*pskb)->data
> > + (*pskb)->nh.iph->ihl*4,
> > ct, ctinfo);
> >
> > and that call instruction is the one that oopses because "help->helper" is
> > corrupt (it's 0x9f5cea37 - not a valid kernel pointer).
>
> I guess its because of an uninitialized helper field in struct
> nf_conntrack_expect, which is then copied from the expectation to
> the conntrack entry.
>
> Peter, do you have locally generated netbios ns queries on the machine
> running nf_conntrack?
I have samba running on both machines. I guess that generates some
netbios traffic even though it isn't currently in active use.
> If so, please try this patch.
Thanks, the patch appears to help. The kernel has now survived much
longer with this patch than it used to do without it.
I will recompile with gcc 4.1.1 too just to make sure, but if you
don't hear anything more from me, consider the case closed. :)
--
Peter Osterlund - [email protected]
http://web.telia.com/~u89404340
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