Messages in this thread | | | Date | Fri, 27 Feb 1998 07:00:10 +0100 (MET) | From | "Michael L. Galbraith" <> | Subject | Re: TCP crashes kernel |
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On Tue, 24 Feb 1998, William T. Waters wrote:
> I have discovered a problem with what looks like the networking layer of the > Linux kernel. The following program will consistently crash an intel box. > It is crippling our efforts to port our software to Linux -- under any sort of > load whatsoever, machines are rolling over & just dying. Sometimes the > program will SEGV or get a Bus Error, sometimes we get kernel syslogs, and > frequently the whole machine will seize up completely. > > Alan Cox has confirmed that this is a problem in 2.0.33, and I just repeated > it on the latest 2.1.88 kernel as well. > > Is anyone else seeing this error in the "real world"? > > Any help in fixing this would be GREATLY appreciated. > > Bill >
Hello Bill, Network Gurus,
I played around with your testprog for several hours yesterday (2.1.88). The thing works fine here as long as the addresses are resolvable via my local DNS; whether I use local host addresses or communicate with my laptop. As soon as I set IP_ADDRESS to a non-resolvable (DNS needs to contact forwarder and can't because ISDN line not uped), the machine freezes hard after a brief spurt of net activity. IRQ's are dead, no blinkenlites, so ktracer can't Oops it.
(Time to try to wedge Ingo's NMI oopser into ktracer I guess :)
Would a tcpdump of the last gasp communication between laptop/desktop be of any use?
The problem is 100% reproducable.
-Mike
P.S. was running 'crash' as joe-user.
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