Re: kern/42248: in_cksum: out of data

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/42248; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/42248: in_cksum: out of data
Date: Mon, 14 Dec 2009 02:46:07 +0000

 On Fri, Oct 30, 2009 at 09:30:00AM +0000, tnn%NetBSD.org@localhost wrote:
  > Obviously this is highly reproducible and I'm willing to add any
  > instrumentation that might help to identify the cause.
  > 
  > Oct 29 17:11:46 build /netbsd: in_cksum: out of data
 
 This message is caused by cpu_in_cksum (in netinet/cpu_in_cksum.c)
 running off the end of its mbuf chain.
 
 Changing the printf to a panic (or breaking in the debugger or
 whatever) and seeing where it's coming from might be illuminating.
 
 Given how regular it is, it's probably triggered by something external.
 
  > Run ntpd(8), dhcpd(8), openvpn and transmission-daemon.
 
 ...although it could also be dhcp.
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost