[asterisk-bugs] [JIRA] (ASTERISK-26946) Crash at the user leaves the conference when the video frame is distributed

[Rusty Newton (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=236574#comment-236574 ] 

Rusty Newton commented on ASTERISK-26946:
-----------------------------------------

Thank you for the crash report. However, we need more information to investigate the crash. Please provide:

1. A backtrace generated from a core dump using the instructions provided on the Asterisk wiki [1].
2. Specific steps taken that lead to the crash.
3. All configuration information necesary to reproduce the crash.

Thanks!

[1]: https://wiki.asterisk.org/wiki/display/AST/Getting+a+Backtrace



> Crash at the user leaves the conference when the video frame is distributed
> ---------------------------------------------------------------------------
>
>                 Key: ASTERISK-26946
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26946
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: . I did not set the category correctly.
>    Affects Versions: 13.1.0
>         Environment: centOS 6.5
>            Reporter: junxu
>
> when the src distribution the video frame to others in the confbridge，another user leave，it will crash。（join and leave confbridge was
>  very frequently use sipp）
> the crash back trace was like that：
> {noformat}
> (gdb) bt
> #0  ast_bridge_queue_everyone_else (bridge=<value optimized out>, bridge_channel=0x1dec7a8, frame=0x7f8f58c619f0) at bridge_channel.c:1108
> #1  0x00007f8f6e05a2cc in softmix_bridge_write_video (bridge=0x1e3fb28, bridge_channel=<value optimized out>, frame=0x7f8f58c619f0)
>     at bridge_softmix.c:561
> #2  softmix_bridge_write (bridge=0x1e3fb28, bridge_channel=<value optimized out>, frame=0x7f8f58c619f0) at bridge_softmix.c:705
> #3  0x00007f8f6d42b127 in send_pic (data=0x675efc8) at app_confbridge.c:9084
> #4  0x0000000000591bad in ast_sched_runq (con=0x7f8f4748e230) at sched.c:625
> #5  0x00000000005920c1 in sched_run (data=0x7f8f4748e230) at sched.c:140
> #6  0x00000000005c46ab in dummy_start (data=<value optimized out>) at utils.c:1232
> #7  0x0000003b210079d1 in start_thread () from /lib64/libpthread.so.0
> #8  0x0000003b20ce8b6d in clone () from /lib64/libc.so.6
> {noformat}
> BTW，i want know why the bridge->channels didn't have the lock,it will operate by muti threads,that's Make me wonder.



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