[asterisk-bugs] [JIRA] (ASTERISK-21737) [patch] - Crash during transfer from DAHDI/SIP to SIP/SIP in ast_format_cap_append called from remote bridge loop

[Nuno Borges (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=213901#comment-213901 ] 

Nuno Borges commented on ASTERISK-21737:
----------------------------------------

Greetings,

Etienne Lessard assumption is correct, i have attached a GDB sample for the same scenario in an asterisk 1.8.7.1. I wonder what is the best approach. In my opinion if the tech_pvt is NULL at this moment we should exit with a AST_BRIDGE_RETRY in remote_bridge_loop, instead of only avoiding this condition.

Best regards.
                
> [patch] - Crash during transfer from DAHDI/SIP to SIP/SIP in ast_format_cap_append called from remote bridge loop
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-21737
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21737
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Transfers, Core/Bridging
>         Environment: Asterisk SVN-branch-11-r385594 
>            Reporter: Alec Davis
>         Attachments: bug_apr30.diff.txt, gdb-apr30.txt, GDB_output_sample_10_01_2014.txt
>
>
> DAHDI call into queue.
> SIP agent answers, then transfer to SIP0007.
>  
> Crashed just after/during a transfer.

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