Re: Infinite loop on multi-session handling

[Andreas Schneider <asn@xxxxxxxxxxxxxx>]

On Monday 13 August 2012 10:51:03 you wrote:
> Hello,

Hi,

> I'm currently experiencing an issue where a libssh function call to
> ssh_channel_request_exec() is getting stuck and taking up 100% CPU.  The
> process I'm running to reproduce this issue does the following:

could you open a bug on red.libssh.org? If you have code examples please add 
them and also check the server log.


Thanks,


	-- andreas

> 
> Thread A
> 
> 1.       Create a new SSH session to IP x.
> 
> 2.       Open a channel and send a command.
> 
> 3.       While bytes are being received, read channel output.
> 
> 4.       Close the channel and session.
> 
> Thread B
> 
> 1.       Create a new SSH session to same IP x.
> 
> 2.       Open a channel and send a command that effectively stops A.3
> 
> 3.       Close the channel and session.
> 
> My guess is that the issue is a result of multiple sessions being created
> for the same host, and when the first session is closed as a result of B.2,
> B is somehow getting stuck, but I do not have enough insight into libssh to
> be certain.
> 
> I have attached logs containing function traces.  Any feedback, comments,
> suggestions, or inputs is very much appreciated.
> 
> Thank you,
> Jonathan
> 
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-- 
Andreas Schneider                   GPG-ID: F33E3FC6
www.cryptomilk.org                asn@xxxxxxxxxxxxxx