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Date: Sat, 30 Sep 2000 11:52:21 -0400 (EDT)
From: rwatson@freebsd.org
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Subject: bin/21661: OpenSSH closes connection after some X11 apps exit
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>Number:         21661
>Category:       bin
>Synopsis:       SSH connections die when using some X11 apps
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 30 09:00:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Robert Watson
>Release:        FreeBSD 4.1-STABLE i386
>Organization:
>Environment:

A variety of FreeBSD versions, including recent 4.1-STABLE.
sshd running, remote login with X11 forwarding.

>Description:

Ssh to a FreeBSD box, run gv, cvsup, or some other relatively high
bandwidth X11 application, and do stuff.  On exiting the application,
the connection will sometimes die:

alsvid:/data/fbsd-current/fresh/acl/src/sys/ufs/ufs> Connection to 192.168.11.102 closed by remote host.
Connection to 192.168.11.102 closed.

I've experienced this both on higher latency links (60ms+) and local
ethernets.  There was some speculation it might have to do with recent
changes in the I/O support in sshd, and full buffers.  sshd does not
die due to a segfault or coredump.

>How-To-Repeat:

See description.

>Fix:

No available.


>Release-Note:
>Audit-Trail:
>Unformatted:


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