[asterisk-bugs] [JIRA] (ASTERISK-21128) Locking inversion when attempting to set caller ID while holding iaxsl lock causes deadlock

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=203184#comment-203184 ] 

Matt Jordan commented on ASTERISK-21128:
----------------------------------------

Yikes. Not sure what I was doing with that first patch, but yes, your modifications are right.

Let me know if the issue pops up again with the patch in place - we'll hold off on committing until you've confirmed it works.
                
> Locking inversion when attempting to set caller ID while holding iaxsl lock causes deadlock
> -------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-21128
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21128
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_iax2
>            Reporter: Pavel Troller
>            Assignee: Pavel Troller
>         Attachments: AST-21128-11.diff, ASTERISK-21128-1.8.diff, ASTERISK-21128-1.8-modified.diff, locks.txt
>
>
> Systems running IAX2 trunks (either with trunk=yes or without it) freeze occasionally with typical symptoms of unreleased locks. The lock appears mostly during the call setup, it hasn't been observed during speech phase or call release. I never found it in 1.6 or less, it appears since 1.8. The newest system on which the problem was observed is indicated below. The only known way to restore functionality is to kill and restart Asterisk. A special debugging Asterisk build has been deployed to one of the sites and core show locks command applied during the deadlock. Its output is attached.

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