kern/185596: in_cksum_skip: out of data by 41310
Jens Kassel
Jens.Kassel at aptilo.com
Tue Jan 14 08:30:01 UTC 2014
The following reply was made to PR kern/185596; it has been noted by GNATS.
From: Jens Kassel <Jens.Kassel at aptilo.com>
To: Gleb Smirnoff <glebius at FreeBSD.org>
Cc: "freebsd-gnats-submit at FreeBSD.org" <freebsd-gnats-submit at FreeBSD.org>
Subject: RE: kern/185596: in_cksum_skip: out of data by 41310
Date: Tue, 14 Jan 2014 08:01:59 +0000
Hi,
I have not tested this on FreeBSD 10.
But I found that the problem can only be reproduced when using the bce driv=
er.=20
Tested with both re & bge drivers and with these the problem cannot be repr=
oduces.
Checked SVN history for bce but could not find any commit that seemed to be=
related to this issue.
Regards,
Jens
-----Original Message-----
From: Gleb Smirnoff [mailto:glebius at FreeBSD.org]=20
Sent: den 9 januari 2014 11:16
To: Jens Kassel
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/185596: in_cksum_skip: out of data by 41310
Jens,
On Thu, Jan 09, 2014 at 06:26:14AM +0000, Jens Kassel wrote:
J> >Originator: Jens Kassel
J> >Release: 8.4
J> Aptilo Networks
J> >Environment:
J> FreeBSD orbytebuild-freebsd84.sth.aptilo.com 8.4-RELEASE FreeBSD 8.4-REL=
EASE8 #0 r251259: Mon Jun 3 01:14:28 UTC 2013 root at bake.isc.freebsd.or=
g:/usr/obj/usr/src/sys/GENERIC i386
J>=20
J> We sometimes see messages like this in dmesg and /var/log/messages
J>=20
J> in_cksum_skip: out of data by 15810
J> in_cksum_skip: out of data by 15810
J> in_cksum_skip: out of data by 15810
J> in_cksum_skip: out of data by 15810
J> in_cksum_skip: out of data by 41310
J>=20
J> I have checked with tcpdump and these messages seems to be triggered whe=
n receiving "ICMP destination unreachable" packets.
J>=20
J> Is this a known issue in this release?
My guessing is that this messages comes off when a packet in wrong byte ord=
er enters in_cksum().
Starting with 10.0, our stack doesn't change byte order of IP packets, so i=
f my guessing is right, the bug should vanish.
We do not plan any more releases from stable/8 branch. Thus, I'd like to cl=
ose the PR if you don't mind.
--
Totus tuus, Glebius.
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