[asterisk-bugs] [JIRA] Created: (ASTERISK-20375) Asterisk channel reference leak when attempting to transfer a call originated to a local channel running the Echo application

[Mark Michelson (JIRA)]

Asterisk channel reference leak when attempting to transfer a call originated to a local channel running the Echo application
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                 Key: ASTERISK-20375
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20375
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
    Affects Versions: 1.8.16.0
            Reporter: Mark Michelson


While working on a separate issue, I managed to reliably create a situation that results in a channel reference leak.

Use the following extensions.conf:
{noformat}
[default]
exten => 11,1,Answer()
same => n,Echo()

exten => 2301,Dial(Local/11 at default,,t)
{noformat}

1) From the CLI issue the following command:

{noformat}
originate SIP/999 extension 2301 at default
{noformat}

where SIP/999 is a SIP phone.

2) Pick up SIP/999 when it starts ringing.
3) Press the configured attended transfer DTMF in features.conf. You will start to hear music on hold (odd).
4) Hang up SIP/999.
5) Issue a {{core show channels}} CLI command.

You will notice that SIP/999 is still around, as are the two Local/2301 channels. Every so often, a warning message will appear

{noformat}
*CLI> [Sep  6 16:37:27] WARNING[610]: chan_sip.c:3918 __sip_autodestruct: Autodestruct on dialog '54200e235d36cebb6182df3d0b9ddf5f at 10.24.20.249:5060' with owner in place (Method: BYE). Rescheduling destruction for 10000 ms
{noformat}

Yay, you have leaking channel refs!

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