[Bug 2079] New: openssh 6.1/6.2 disconnect due to channel bug

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2079

            Bug ID: 2079
           Summary: openssh 6.1/6.2 disconnect due to channel bug
    Classification: Unclassified
           Product: Portable OpenSSH
           Version: 6.1p1
          Hardware: amd64
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: emilliken at gmail.com

To reproduce:

in one terminal:
test$ ssh host -MS /tmp/test
<<do a full login>>

in a second terminal on the same machine (2.2.2.2 is an unresponsive
host):
test$ ssh 0 -S /tmp/test -W 2.2.2.2:22
^C << hit control-c >>
test$ ssh 0 -S /tmp/test -W 2.2.2.2:22
<<wait about 90 seconds for ssh to timeout and exit>>
test$ ssh 0 -S /tmp/test -W localhost:22

Now, the ssh from terminal one and two will exit immediately.  The
error in terminal 1 is:
channel_by_id: 3: bad id: channel free
Disconnecting: Received open failure for non-opening channel 3.

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