From: Thomas Graf <tgraf@suug.ch>
To: David Coulson <david@davidcoulson.net>
Cc: "David S. Miller" <davem@davemloft.net>,
Herbert Xu <herbert@gondor.apana.org.au>,
kaber@trash.net, netdev@oss.sgi.com
Subject: Re: skb_checksum_help
Date: Mon, 24 Jan 2005 16:15:10 +0100 [thread overview]
Message-ID: <20050124151510.GV23931@postel.suug.ch> (raw)
In-Reply-To: <41F50B6C.6010107@davidcoulson.net>
* David Coulson <41F50B6C.6010107@davidcoulson.net> 2005-01-24 09:51
> Thomas Graf wrote:
> >Yes, this might clear things up.
>
> 10.1.1.5 is a production NS, so there is >500kbit/sec of DNS traffic to
> the box. Do you want me to restrict tcpdump to the /24 we were seeing
> traffic from which broke the kernel, or dump everything and send the
> part from around when the kernel fails?
After inspecting your iptables rule set I think it is a general UDP DNAT
problem under some circumstances. Some defragmentation weirdness in
prerouting might be invovled. It would definitely help to have a dump
of a complete ip fragments sequence causing this bug but I can't tell
what exactly is the cause just now so yes it might be a good idea to
limit the dump to the above subnet and hope the dodgy traffic comes
from the same subnet again.
next prev parent reply other threads:[~2005-01-24 15:15 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <41F432BD.3000300@davidcoulson.net>
2005-01-24 0:32 ` skb_checksum_help Thomas Graf
2005-01-24 0:49 ` skb_checksum_help Patrick McHardy
2005-01-24 0:53 ` skb_checksum_help Thomas Graf
2005-01-24 1:31 ` skb_checksum_help Herbert Xu
2005-01-24 4:27 ` skb_checksum_help David S. Miller
2005-01-24 4:38 ` skb_checksum_help David S. Miller
2005-01-24 4:46 ` skb_checksum_help Patrick McHardy
2005-01-24 4:56 ` skb_checksum_help Herbert Xu
2005-01-24 5:07 ` skb_checksum_help Patrick McHardy
2005-01-24 12:22 ` skb_checksum_help Thomas Graf
2005-01-24 13:09 ` skb_checksum_help Patrick McHardy
2005-01-24 14:49 ` skb_checksum_help David Coulson
2005-01-24 12:16 ` skb_checksum_help Thomas Graf
2005-01-24 14:51 ` skb_checksum_help David Coulson
2005-01-24 15:15 ` Thomas Graf [this message]
2005-01-24 15:27 ` skb_checksum_help David Coulson
2005-01-24 22:54 ` skb_checksum_help Herbert Xu
2005-01-24 23:45 ` skb_checksum_help Thomas Graf
2005-01-25 0:07 ` skb_checksum_help Herbert Xu
2005-01-25 0:40 ` skb_checksum_help David S. Miller
2005-01-25 1:45 ` skb_checksum_help Thomas Graf
2005-01-25 1:48 ` skb_checksum_help Herbert Xu
2005-01-25 1:59 ` skb_checksum_help David Coulson
2005-01-25 2:07 ` skb_checksum_help Herbert Xu
2005-01-25 2:01 ` skb_checksum_help Thomas Graf
2005-01-25 2:03 ` skb_checksum_help David S. Miller
2005-01-25 2:24 ` skb_checksum_help Thomas Graf
2005-01-25 3:43 ` skb_checksum_help David S. Miller
2005-01-25 12:05 ` skb_checksum_help David Coulson
2005-01-25 14:33 ` skb_checksum_help Thomas Graf
2005-01-25 20:36 ` skb_checksum_help Thomas Graf
2005-01-25 20:48 ` skb_checksum_help Ben Greear
2005-01-25 21:15 ` skb_checksum_help Thomas Graf
2005-01-25 22:14 ` skb_checksum_help Ben Greear
2005-01-25 23:31 ` skb_checksum_help David S. Miller
2005-01-25 23:30 ` skb_checksum_help David S. Miller
2005-01-25 20:50 ` skb_checksum_help David S. Miller
2005-01-25 2:02 ` skb_checksum_help David S. Miller
2005-01-25 2:14 ` skb_checksum_help Herbert Xu
2005-01-25 11:23 ` skb_checksum_help Herbert Xu
2005-01-25 20:46 ` skb_checksum_help David S. Miller
2005-01-25 2:15 ` skb_checksum_help Patrick McHardy
2005-01-25 14:16 ` skb_checksum_help David Coulson
2005-01-24 1:31 ` skb_checksum_help David Coulson
2005-01-24 12:31 ` skb_checksum_help Thomas Graf
2005-01-24 14:25 ` skb_checksum_help David Coulson
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