[asterisk-bugs] [JIRA] (ASTERISK-27568) Crash in ast_channel_hangupcause when using chan_pjsip

[Bryan Walters (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=241467#comment-241467 ] 

Bryan Walters commented on ASTERISK-27568:
------------------------------------------

This started occurring for the user as upgrading from 13.18.4 to 13.18.5. Looking over a bunch of crashes, they all happen at the same spot and let me see if I can dig up some logs to attach to the issue to further assist you guys.

> Crash in ast_channel_hangupcause when using chan_pjsip
> ------------------------------------------------------
>
>                 Key: ASTERISK-27568
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27568
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.18.5
>            Reporter: Bryan Walters
>            Assignee: Bryan Walters
>              Labels: pjsip
>         Attachments: backtrace.txt
>
>
> We've had reports from users of Asterisk 13.18.5 where asterisk will core dump pretty frequently when using chan_pjsip. Reviewing this with our team, it appears that that chan_pjsip_session_end checks session->channel for validity and later calls ast_channel_hangupcause(session->channel). However, between the time of the check and the call to ast_channel_hangupcause, something is setting session->channel to null, thus causing Asterisk to core dump.



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