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

[Pavel Troller (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-21128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pavel Troller updated ASTERISK-21128:
-------------------------------------

    Attachment: AST-21128-11.diff

Added the same patch ported to Asterisk 11 (SVN branch). Asterisk 11 has the same bug.
                
> 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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