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Date: Sun, 08 Feb 2009 10:45:13 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
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Cc: 
Subject: Re: impossible packet length ... 
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I'm reposting this to hackers, and there is some more info.

> Hi,
> on 2 different servers, running 7.1-stable + zfs, I get this
> error rather frequently:
> 
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (543383918) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1936028704) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1869363744) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1667787057) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (976040755) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1953459488) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1348825156) from 
> nfs server sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (0) from nfs server 
> sunfire:/dist
> Feb  5 17:01:03 warhol-00 kernel: impossible packet length (1647208041) from 
> nfs server sunfire:/dist
> 
> in this case the server is running Freebsd-7.0-stable, but I also get it when 
> the server is a
> netapp.
> 
> is there a connection?
> 
> thanks,
> 	danny

going through the logs, after it happened again, I got a glimps of this:

Feb  6 18:00:13 warhol-00.cs.huji.ac.il kernel: bce0: discard frame w/o 
leading ethernet header (len 0 pkt len 0)
Feb  6 18:00:19 klee-05.cs.huji.ac.il kernel: nfs: server warhol-00 not 
responding, timed out
...
Feb  6 19:00:00 warhol-00.cs.huji.ac.il amd[715]: More than a single value for 
/defaults in hesiod.local
Feb  6 19:00:00 warhol-00.cs.huji.ac.il amd[715]: Unknown $ sequence in 
"rhost:=${RHOST};type:=nfsl;fs:=${FS};rfs:=$huldig<C0>#^ZM-^KoM- abase"
Feb  6 19:00:00 warhol-00.cs.huji.ac.il kernel: impossible packet length 
(2068989523) from nfs server sunfire:/dist

which seems to point fingers at bce...

danny