[asterisk-bugs] [JIRA] (ASTERISK-26474) res_musiconhold: Crash when scanning files

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-26474:
-----------------------------------

    Summary: res_musiconhold: Crash when scanning files  (was: res_musiconhold segfault in free)

> res_musiconhold: Crash when scanning files
> ------------------------------------------
>
>                 Key: ASTERISK-26474
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26474
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_musiconhold
>    Affects Versions: 13.11.2, 14.0.2
>         Environment: Fedora 23
>            Reporter: Ross Beer
>         Attachments: backtrace_clean.txt
>
>
> Asterisk crashes in music on hold free when playing from within a queue:
> {noformat}
> #0  0x00007f149f800a28 in raise () at /lib64/libc.so.6
> #1  0x00007f149f80262a in abort () at /lib64/libc.so.6
> #2  0x00007f149f843dea in  () at /lib64/libc.so.6
> #3  0x00007f149f84c22a in _int_free () at /lib64/libc.so.6
> #4  0x00007f149f84f78c in free () at /lib64/libc.so.6
> #5  0x00007f1398536ca7 in moh_scan_files (class=0x7f1418003348) at res_musiconhold.c:1099
> {noformat}
> This looks to be related to the option 'cachertclasses=yes' and has been raised before in Asterisk 1.8 under ticket ASTERISK-22083 
> Before the segfault, the CLI showed the following:
> {noformat}
> [2016-10-17 08:42:19] WARNING[26321][C-00000147]: res_musiconhold.c:361 ast_moh_files_next: Unable to open file '▒': No such file or directory
> [2016-10-17 08:42:19] WARNING[26331][C-0000014f]: file.c:774 ast_openstream_full: File  does not exist in any format
> [2016-10-17 08:42:19] WARNING[26331][C-0000014f]: res_musiconhold.c:361 ast_moh_files_next: Unable to open file '': No such file or directory
> [2016-10-17 08:42:19] WARNING[26321][C-00000147]: file.c:774 ast_openstream_full: File  does not exist in any format
> [2016-10-17 08:42:19] WARNING[26321][C-00000147]: res_musiconhold.c:361 ast_moh_files_next: Unable to open file '': No such file or directory
> [2016-10-17 08:42:19] WARNING[26331][C-0000014f]: file.c:774 ast_openstream_full: File  does not exist in any format
> [2016-10-17 08:42:19] WARNING[26331][C-0000014f]: res_musiconhold.c:361 ast_moh_files_next: Unable to open file '': No such file or directory
> [2016-10-17 08:42:19] WARNING[26321][C-00000147]: file.c:774 ast_openstream_full: File  does not exist in any format
> {noformat}
> I believe that the file scan process did not return cleanly to other threads and therefore they output the above messages. This eventually lead to the crash.



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