[asterisk-bugs] [JIRA] (ASTERISK-28470) Mutex deadlock in audio_audiohook_write_list

[Kevin Harwell (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-28470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kevin Harwell closed ASTERISK-28470.
------------------------------------

    Resolution: Suspended

Yes, it's quite possible a newer version could resolve your issue. I'm closing this issue for now, but if you experience the same problem on the latest version feel free to respond and re-open this issue.

Also, it sounds like you are running a modified (custom patched) version of Asterisk. If this is the case you'll also have to isolate the problem without any custom patches applied or we will be unable to look into it.

> Mutex deadlock in audio_audiohook_write_list
> --------------------------------------------
>
>                 Key: ASTERISK-28470
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28470
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: 16.3.0
>         Environment: CentOS 6.10
>            Reporter: Andre Heber
>            Assignee: Unassigned
>         Attachments: info_threads.png, mutex_1.png, mutex_2.png, stack_trace_1.png, stack_trace_2.png
>
>
> In main/audiohook.c in the function "audio_audiohook_write_list" is the following code:
> {code:java}
>     ast_audiohook_lock(audiohook);
> 		if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
> 			AST_LIST_REMOVE_CURRENT(list);
> 			removed = 1;
> 			ast_audiohook_update_status(audiohook, AST_AUDIOHOOK_STATUS_DONE);
> 			ast_audiohook_unlock(audiohook);
> {code}
> But "ast_audiohook_update_status" also locks "audiohook" "if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING)", which results in a frozen thread.
> This happens 3x in "audio_audiohook_write_list" and 1x in "dtmf_audiohook_write_list".



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