[asterisk-bugs] [JIRA] (ASTERISK-29846) channels: bad ao2 ref causes crash

[Kevin Harwell (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=257946#comment-257946 ] 

Kevin Harwell commented on ASTERISK-29846:
------------------------------------------

{quote}
It's not 100% clean, as there hasn't been an 18.10 yet so I have some unreleased patches included and some other modules that I haven't submitted for review, but nothing that seems immediately relevant off-hand.
{quote}
The problem is there is just no way to know. Especially since it appears to be a memory corruption. One of your modules could be corrupting memory in some way even if it's not immediately obvious.

Issues can only be accepted if we know for sure the problem is occurring within code found within the current Asterisk code base as it would be nigh impossible to fix an issue in which we have no view into.

Until you can guarantee the issue is Asterisk only (full clean build with no private non submitted patches applied) there's not much we can do aside from offer ideas to help you debug things (see some of the above comments for ideas). And until such can occur I'd suggest moving this discussion to the one of the community forums (dev list, IRC, etc...) for more help.

> channels: bad ao2 ref causes crash
> ----------------------------------
>
>                 Key: ASTERISK-29846
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29846
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: General
>    Affects Versions: 18.9.0
>         Environment: Debian 10
>            Reporter: N A
>            Assignee: N A
>         Attachments: core-asterisk-2022-02-01T17-04-52Z-brief.txt, core-asterisk-2022-02-01T17-04-52Z-full.txt, core-asterisk-2022-02-01T17-04-52Z-info.txt, core-asterisk-2022-02-01T17-04-52Z-locks.txt, core-asterisk-2022-02-01T17-04-52Z-thread1.txt
>
>
> Currently, Asterisk crashes randomly every few days, not seemingly linked to anything going on at the moment. In fact, prior to this crash, the system was completely idle (no calls) for the previous 34 minutes.
> Here is a backtrace from right before the last crash, useful as it has line numbers:
> 01:35:03 ERROR[13076] : Got 10 backtrace records
> # 0: [0x55ca492928cc] asterisk utils.c:2727 __ast_assert_failed()
> # 1: [0x55ca49109db3] asterisk astobj2.c:212 log_bad_ao2()
> # 2: [0x55ca4910a73a] asterisk astobj2.c:501 __ao2_ref()
> # 3: [0x55ca4917269a] asterisk cli.c:1218 handle_chanlist()
> # 4: [0x55ca4917859f] asterisk cli.c:3020 ast_cli_command_full()
> # 5: [0x55ca49178734] asterisk cli.c:3048 ast_cli_command_multiple_full()
> # 6: [0x55ca49101e0c] asterisk asterisk.c:1424 netconsole()
> # 7: [0x55ca4928fb57] asterisk utils.c:1572 dummy_start()
> # 8: [0x7f257c305fa3] libpthread.so.0 pthread_create.c:487 start_thread()
> # 9: [0x7f257bd994cf] libc.so.6 clone.S:97 clone()



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