[asterisk-bugs] [JIRA] (ASTERISK-26974) res_pjsip: Deadlock in T.38 framehook

[Richard Mudgett (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Mudgett updated ASTERISK-26974:
---------------------------------------

    Attachment: backtrace-threads-PJSIP.txt

[^backtrace-threads-PJSIP.txt] - Initially attached to ASTERISK-26445 but it was a different deadlock than the other backtraces.

> res_pjsip: Deadlock in T.38 framehook
> -------------------------------------
>
>                 Key: ASTERISK-26974
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26974
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_t38
>    Affects Versions: 13.15.0
>            Reporter: Richard Mudgett
>         Attachments: backtrace-threads-PJSIP.txt
>
>
> A deadlock can happen while T.38 is active and a re-INVITE happens.  The thread processing the re-INVITE is trying to update the channel's format capabilities while the channel thread is trying to send a frame.  The thread processing the re-INVITE has the session's media container lock and wants the channel lock and the channel thread has the channel lock and wants the session's media container lock.



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