Re: ping error

Richard B. Johnson (root@chaos.analogic.com)
Thu, 15 Jul 1999 09:17:49 -0400 (EDT)


On Wed, 14 Jul 1999, Horst von Brand wrote:

> Richard Henderson <rth@twiddle.net> said:
> > On Wed, Jul 14, 1999 at 05:38:20PM +0200, Levente Farkas wrote:
> > > [lfarkas@firewall:/home/lfarkas]ping www.intel.com
> > > PING www.intel.com (192.102.198.160) from 194.152.134.8 : 56 data bytes
> > > 64 bytes from 192.102.198.160: icmp_seq=0 ttl=40 time=1253.3 ms
> > > wrong data byte #8 should be 0x54 but was 0x53
> > > 53 70 8b 37 29 b7 b 0 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 ...
> > [...]
> > > the problem allways at 8th byte, the difference is allways 1 and it's
> > > increase by 1 in the packages.
> > [...]
> > > it's a RH 6.0 with all update on a pentium mmx, with kernel 2.2.5-22.
>
> > On a pentium? Are you absolutely certain? This is the exact
> > fingerprint of a 64-bit cleanliness bug in ping that showed up
> > in RH6 on Alpha.
>
> I'm quite sure this here is a i586 ;-) Same symptoms, seem to be more
> likely when other heavy traffic is going (downloading mail via fetchmail
> from a machine just after the modems via CSLIP). All RH 6.0 updates in
> place, 2.3.6 kernel compiled with a egcs snapshot, also newer kernels.
> --
> Horst von Brand vonbrand@sleipnir.valparaiso.cl
> Casilla 9G, Viņa del Mar, Chile +56 32 672616

I think it's a bad 'ping' shipped with RedHat. I have an old ping,
(output from strings):

/lib/ld-linux.so.2
libc.so.6
$Id: ping.c,v 1.23 1998/06/20 10:11:05 typo Exp $

This does not demontrate your observed problem. This version of
ping also doesn't fix the problem of pinging the loop-back
path. I would guess that the ping bug got introduced around that
time.

Cheers,
Dick Johnson
FILE SYSTEM MODIFIED
Penguin : Linux version 2.2.6 on an i686 machine (400.59 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.

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