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DateMon, 8 Dec 2003 08:17:30 -0200 (BRST)
FromMarcelo Tosatti <>
SubjectRe: 2.4.23 hard lock, 100% reproducible.

On Sun, 7 Dec 2003, Mark Symonds wrote:

> 
> Hi,
> 
> > 
> > The first oops looks like:
> > 
> > Unable to handle kernel NULL pointer
> > dereference at virtual address: 00000000
> > 
> [...]
> > 
> > 
> > Isnt it a bit weird that the full backtrace is not reported ? 
> > 
> > wli suggests that might stack corruption.
> > 
> 
> My bad - wrote it down by hand originally since 
> it was locked hard.  
> 
> > 
> > I dont see any suspicious change around tcp_print_conntrack().
> > 
> > Any clues? 
> > 
> 
> I'm using ipchains compatability in there, looks like 
> this is a possible cause - getting a patch right now,
> will test and let y'all know (and then switch to 
> iptables, finally). 

Mark,

Please try the latest BK tree. There was a known bug in the netfilter code 
which could cause the lockups. 





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