[asterisk-dev] [Code Review] 3284: chan_sip: Fix deadlock of monlock between unload_module and do_monitor

[Corey Farrell]

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Review request for Asterisk Developers.


Bugs: ASTERISK-21406
    https://issues.asterisk.org/jira/browse/ASTERISK-21406


Repository: Asterisk


Description
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This change prevents a deadlock caused by running pthread_join with monlock held in unload_module.  This ensures that if do_monitor trys to lock monlock after unload_module, it will eventually receive the lock and be allowed to exit.


Diffs
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  /branches/1.8/channels/chan_sip.c 409411 

Diff: https://reviewboard.asterisk.org/r/3284/diff/


Testing
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Tested with chan_sip-unload-deadlock-debug.patch from ASTERISK-21406 to ensure I could no longer reproduce the deadlock.


Thanks,

Corey Farrell

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