[asterisk-bugs] [JIRA] (ASTERISK-22857) Deadlock: Locked Here: chan_iax2.c line 9756 (socket_read)

[David Brillert (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-22857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=212054#comment-212054 ] 

David Brillert commented on ASTERISK-22857:
-------------------------------------------

This is definitely a regression in SVN.
Since I was able to reproduce easily with some CLI commands I tested some older revisions.
The last stable Asterisk revision was 399516 which we installed on September 27th 2013.

The only commit to chan_iax2 since that date is:

Revision 401016 - Directory Listing
Modified Tue Oct 15 19:57:06 2013 UTC (5 weeks ago) by rmudgett

chan_iax2: Fix channel left locked in off nominal code path.

So this IMHO must be the cause of the regression.

                
> Deadlock: Locked Here: chan_iax2.c line 9756 (socket_read)
> ----------------------------------------------------------
>
>                 Key: ASTERISK-22857
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22857
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_iax2
>    Affects Versions: SVN, 11.6.0
>         Environment: 64 bit CentOS, 4GB RAM
>            Reporter: David Brillert
>            Assignee: David Brillert
>            Severity: Critical
>         Attachments: backtrace.txt, core show locks_gdb thread apply all bt full.txt, gdbcorebtbtfull.txt, iax2 debug.txt, valgrind.txt
>
>
> Full deadlock no call processing, no SIP traffic.
> GDB output DONT_OPTIMIZE DEBUG_THREADS BETTER_BACKTRACES thread apply all bt full.txt attached.  The deadlock occurred overnight while the system was idle.
> It is happening on multiple production servers.

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