RE: address already in use on previously used (but currently unused) IP:PORT combinations in sctp_bi

["Franklin Marmon" <marmon@hydeco.com>]

I did have a connection prior to the binding. If I can reproduce I will test against the 4.8.x kernel when I am able. This is a live system and requires coordinate with others. 

Thank you!

frm

Franklin Marmon
The Hyde Company
331 East Broadway
Missoula, MT 59801

Office: 406.541.4777
Cell: 406.493.2460
http://www.hydeco.com
marmon@hydeco.com

-----Original Message-----
From: Xin Long [mailto:lucien.xin@gmail.com] 
Sent: Wednesday, August 2, 2017 7:28 AM
To: marmon@hydeco.com
Cc: linux-sctp@vger.kernel.org; smcclain@hydeco.com; jerry@hydeco.com
Subject: Re: address already in use on previously used (but currently unused) IP:PORT combinations in sctp_bindx()

On Wed, Aug 2, 2017 at 7:43 AM, Franklin Marmon <marmon@hydeco.com> wrote:
> Hello,
>
> I'm having trouble with sctp_bindx() reporting address already in use 
> when attempting to bind sockets. The IP:PORT combinations are not 
> open, do not show up in /proc/net/sctp/assocs, netstat, ss, or lsof. 
> The IP:PORTs were bound in a previous instance of the client 
> application however that application itself has been killed and 
> restarted. It is as if the kernel believes the IP:PORT pair is in use 
> when, as far as I can tell, it isn't. If I change the ports used in my 
> addresses to ports I have not used previously the bind succeeds 
> without issue. Any suggestions on how I can tell what is holding the ports open, or how to reset the sctp port table in the kernel?
>
> Lksctp-tools verison: 1.0.16
> Kernel version: 4.4.6
Did you have sctp connection and sctp traffic before this binding ?
It maybe an asoc leak in 4.4.y kernel.
If it's reproducable, can you try against this commit(or with 4.8.y kernel)

commit b61c654f9b3f1a271217e46c893f80565b1f754d
Author: Xin Long <lucien.xin@gmail.com>
Date:   Wed Sep 14 02:04:20 2016 +0800

    sctp: free msg->chunks when sctp_primitive_SEND return err




> IP-Family: IPv4
> Number of addresses passed to sctp_bindx(): normally 2, have tested 
> with each address individually
>
> frm
>
>
> Franklin Marmon
> The Hyde Company
> 331 East Broadway
> Missoula, MT 59801
>
> Office: 406.541.4777
> Cell: 406.493.2460
> http://www.hydeco.com
> marmon@hydeco.com
>
>
> --
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