sshd problem with recent snapshots

Ken Brown
Mon Nov 15 20:26:00 GMT 2010

On 11/15/2010 11:53 AM, Corinna Vinschen wrote:
> On Nov 15 11:40, Christopher Faylor wrote:
>> On Mon, Nov 15, 2010 at 11:18:57AM -0500, Ken Brown wrote:
>>> On 11/15/2010 11:09 AM, Corinna Vinschen wrote:
>>>> On Nov 13 10:00, Ken Brown wrote:
>>>>> On 11/5/2010 8:03 AM, Ken Brown wrote:
>>>>>> If I start sshd on a machine running a recent snapshot, I'm unable to
>>>>>> login to that machine via ssh.  The connection is closed right after I
>>>>>> type my password.  The problem first appears in the snapshot of
>>>>>> 20100917.  To reproduce:
>>>>>> 1. Start sshd.
>>>>>> 2. While logged in as one user, try to login as another user.  For example:
>>>>>> $ ssh kbrown-admin@localhost
>>>>>> kbrown-admin@localhost's password:
>>>>>> Connection to localhost closed by remote host.
>>>>>> Connection to localhost closed.
>>>>>> The same thing happens if I try to ssh in from a different machine on
>>>>>> the network.
>>>>> Further information:  There are two entries in the Windows Event
>>>>> Viewer (Application Log) after the failed login:
>>>>> sshd: PID 2264: Accepted password for kbrown-admin from ::1 port 1025 ssh2.
>>>>> sshd: PID 2264: fatal: chmod(/dev/tty1, 0622) failed: Permission denied.
>>>> Hmm, that's weird.  I'm using the latest Cygwin from CVS, and I cannot
>>>> reproduce this.  I tried to login from a remote machine with pubkey and
>>>> password authentication using an admin account as well as a normal user
>>>> account.  Works fine for me in all these cases.
>>>> I can't quite believe it, but maybe that's OS related.  I'm running my
>>>> tests on W7 in the first place.  What OS are you using?
>>> XP SP3.
>> FWIW, I couldn't duplicate this on XP SP3 but my ssh installation was a
>> little nonstandard.  I ended up breaking ssh entirely over the weekend
>> so I'm looking for a random helpful blog to help me diagnose the
>> problem.
>> But, seriously, I'll check this as soon as I get things back to a running
>> state.
> What I don't grok is that this should start with the 20100917 snapshot,
> but works with 20100912.  There's nothing in the 09-17 ChangeLog which
> would be related.

It doesn't make sense to me either, but I've just rechecked that the 
problem occurs with the 09-17 snapshot (as well as the current one), but 
not with the 09-12 snapshot.  I'm attaching my cygcheck output (with the 
09-17 snapshot installed) in case there's something there that could be 

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