[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

[Alec Davis (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=207320#comment-207320 ] 

Alec Davis commented on ASTERISK-21737:
---------------------------------------

We've been running the attached bug_apr30.diff.txt patch for 6 weeks with a slight mod where {{sip_get_codec()}} emits a warning 'Avoided segfault'

{noformat}
+       } else {
+               ast_log(LOG_ERROR, "ALEC Avoided segfault\n");
{noformat}

But never was the 'Avoided segfault' path taken????

                
> [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
>
>
> DAHDI call into queue.
> SIP agent answers, then transfer to SIP0007.
>  
> Crashed just after/during a transfer.

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