[asterisk-bugs] [JIRA] (ASTERISK-24621) chan_sip: Crash caused by invalid reference to object in __sip_autodestruct

[JoshE (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-24621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=224318#comment-224318 ] 

JoshE commented on ASTERISK-24621:
----------------------------------

Trying to get this created.  It looks like this was caused only by very high rate of speed SIPvicious-style INVITE attacks.  The repro on this is difficult to get, at least in my environment, but it has been observed every week or so.

> chan_sip: Crash caused by invalid reference to object in  __sip_autodestruct
> ----------------------------------------------------------------------------
>
>                 Key: ASTERISK-24621
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24621
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: 11.13.0
>         Environment: CentOS 7
>            Reporter: JoshE
>            Assignee: JoshE
>            Severity: Critical
>         Attachments: schedulercrash.txt
>
>
> Seen another variant of a scheduler-related crash on Asterisk 11.13.
> #0  0x000000000044ba74 in INTERNAL_OBJ (user_data=0x4542) at astobj2.c:153
>         p = 0x4522
>         __PRETTY_FUNCTION__ = "INTERNAL_OBJ"
> #1  0x000000000044c110 in internal_ao2_ref (user_data=0x4542, delta=1, file=0x63da74 "astobj2.c", line=548, func=0x63dd31 <__FUNCTION__.8060> "__ao2_ref") at astobj2.c:430
>         obj = 0x7fbbca726638
>         obj_mutex = 0x7fbc5d035cf4
>         obj_rwlock = 0x7fbc5d04f7c0 <__PRETTY_FUNCTION__.34031>
>         current_value = 8998
>         ret = 0
>         __PRETTY_FUNCTION__ = "internal_ao2_ref"



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