[asterisk-bugs] [JIRA] (ASTERISK-22732) Deadlock potential in res_fax and CCSS with local channels.

[Richard Mudgett (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-22732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=231967#comment-231967 ] 

Richard Mudgett commented on ASTERISK-22732:
--------------------------------------------

Gerrit reviews:
https://gerrit.asterisk.org/#/c/3698/ through https://gerrit.asterisk.org/#/c/3723/

> Deadlock potential in res_fax and CCSS with local channels.
> -----------------------------------------------------------
>
>                 Key: ASTERISK-22732
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22732
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Core/CallCompletionSupplementaryServices, Resources/res_fax
>    Affects Versions: 1.8.23.1, 11.5.1, 12.0.0-beta1
>            Reporter: Richard Mudgett
>
> res_fax and CCSS code call ast_channel_queryoption() with a channel lock held.  If the specified channel is a local channel, there is a deadlock potential due to how local channels have to do deadlock avoidance.
> All calls to ast_channel_queryoption() must not have a channel lock held by the caller.
> There is a brief discussion about it in https://reviewboard.asterisk.org/r/2915/



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