[asterisk-bugs] [JIRA] (ASTERISK-29376) res_rtp_asterisk: Coredump with t.140 RED enabled

[Thomas Johnson (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=254504#comment-254504 ] 

Thomas Johnson commented on ASTERISK-29376:
-------------------------------------------

I have the following values for my chan_sip calls
textsupport=yes
allow=red
allow=t140
 
After that, I have a piece of code that dials 20 calls one after the other. I answer all of them one after the other and start hanging them up after answering all 20. In the process of answering and hanging up, the Asterisk would crash.  When the calls are answered by our Softphone, it sends the UTF BOM (\xFEFF).    SipCon1 does this also, but only can do one call at a time.    It might take longer to crash just doing a single call at a time.


> res_rtp_asterisk: Coredump with t.140 RED enabled
> -------------------------------------------------
>
>                 Key: ASTERISK-29376
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29376
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_rtp_asterisk
>    Affects Versions: 17.8.1
>         Environment: RedHat 8
>            Reporter: Thomas Johnson
>            Assignee: Thomas Johnson
>         Attachments: core.asterisk.2431.ipswitchdev66.microautomation.local.1617722782-brief.txt, core.asterisk.2431.ipswitchdev66.microautomation.local.1617722782-full.txt, core.asterisk.2431.ipswitchdev66.microautomation.local.1617722782-info.txt, core.asterisk.2431.ipswitchdev66.microautomation.local.1617722782-locks.txt, core.asterisk.2431.ipswitchdev66.microautomation.local.1617722782-thread1.txt
>
>
> Asterisk will randomly coredump if RED is allowed.  The exception is in an apparent scheduled callback to red_write.   I tried modifying the function to check for NULL pointers, but it still crashes due to possibly an invalid pointer.



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