Re: ssh going zombie

Robert L Sowders wrote:

> on the server kill the ssh server then restart it with the -d flag to put 
> it into debug mode.  This process will not fork and will write all debug 
> output to the stderr (the window you started it from), then connect with 
> winscp and try to duplicate the error you reported. 
>
> it should give you some clues as to what is happening.
>
> rls
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> Peter Childs <dp@expressnationalcarriers.co.uk>
> 04/28/2005 08:56 PM
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>        To:     secureshell@securityfocus.com
>        cc: 
>        Subject:        ssh going zombie
>
>
>    Using sshd under Debian Unstable Openssh  0.9.7e
>
>    When winscp disconnects from our server the scp process goes zombie 
> and the ssh process hogs the processor on the server.  This only seams 
> to happern with winscp  and not with  scp or  ssh  under  linux. If the 
> subprocess is removed from the sshd config file the a sub sshd process 
> goes zombie instead and the calling sshd process hogs the processor.
>
>    I'm think it may have somthing to do with the way winscp talks to 
> sshd , but the winscp people seam to think this is a problem with sshd. 
> I get this feeling this is going to be a problem nobody has a clue on 
> and wishes to blame the other party.
>
>
> Peter Childs
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>  
   Ok after installing ssh 4.0 from source I've fixed the problem. It 
seams that 3.8 which is on debian sarge has a bug when it uses 
sftp-server in that it does not wait for the process to end and then 
hogs the processor.

Peter CHilds