[820] in SIPB_Linux_Development
[Linus.Torvalds@cs.Helsinki.FI: Re: Bug in linux kernel 1.1.65]
daemon@ATHENA.MIT.EDU (nocturne@MIT.EDU)
Thu Nov 24 11:48:14 1994
From: nocturne@MIT.EDU
Date: Thu, 24 Nov 1994 11:48:10 -0500
To: linux-dev-mtg@charon.MIT.EDU
Date: Thu, 24 Nov 1994 10:28:16 +0200
From: Linus Torvalds <Linus.Torvalds@cs.Helsinki.FI>
In-Reply-To: nocturne@MIT.EDU's message as of Nov 24, 1:48
X-Mailer: Mail User's Shell (7.2.0 10/31/90)
To: nocturne@MIT.EDU, A.Cox@swansea.ac.uk
Subject: Re: Bug in linux kernel 1.1.65
Hi, this seems to be a *very* silly bug in the multicast code.. The new
1.1.65 should disable addresses of the form 224+.*.*.* as it judges them
to be multicast addresses, but there is obviously a bug where it does a
byte-order mistake, and tests for the multicast addresses in the wrong
byte-order.
Anyway, never fear, we'll fix it: it should be easy to find once
noticed. Wait for 1.1.66..
Alan: I'm including his mail for reference..
Thanks,
Linus
----------
nocturne@MIT.EDU: "Bug in linux kernel 1.1.65" (Nov 24, 1:48):
>
> Hello. I have been observing a consistent bug in my network interactions,
> which seems to be caused by network changes between the 1.1.64 linux kernel
> and the 1.1.65 linux kernel.
>
> The short description of this problem is that I get "Network is unreachable"
> errors when I attempt to use any of a number of basic programs which connect
> to sockets to certain other IP addresses. The different methods I've used to
> get the same error seem to be various network client programs which need to
> open a socket to the remote machine. These include telnet, finger, ftp, and
> a finger client I wrote in perl (it fails on connect() ).
>
> ping and traceroute have no problems in dealing with these IP addresses.
>
> Among the addresses I've been unable to reach are:
> 18.70.0.{224-239}
> 18.208.0.{224-239}
>
> Having spent a minute or so testing random IP addresses ending in numbers
> between 224 and 239, it seems that I get this same error message for any IP
> address of the format *.*.*.{224-239} .
>
> There may be other IP addresses which generate this error. I didn't have
> much inclination to test this exhaustively. :-)
>
> If you need me to run more test cases, feel free to ask me for assistance.
> If you need an account on my computer to test this, feel free to ask me for
> one. :-)
>
> Otherwise, I'd appreciate hearing about the details of the errors in the new
> network code in the 1.1.65 kernel... :-)
>
> A few details of my system and network configuration:
>
> * I'm running a 1.1.65 kernel, compiled from an unmodified kernel source
> tree ftp'd from tsx-11.mit.edu:/pub/linux/sources/system/v1.1
> * I'm on a class A network
> * I'm currently using the linux-AFS loadable kernel modules
>
> - Eric
>
>
