[asterisk-bugs] [JIRA] (ASTERISK-20792) Segfault during calloc, core dump shows logging string at requested pointer address

[Emiel Suilen (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-20792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emiel Suilen updated ASTERISK-20792:
------------------------------------

    Attachment: bt

backtrace
                
> Segfault during calloc, core dump shows logging string at requested pointer address
> -----------------------------------------------------------------------------------
>
>                 Key: ASTERISK-20792
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20792
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: General
>         Environment: CentOS 6.3 (Final)
> Kernel 2.6.32-279.9.1el6.x86_64
> 4 Gb memory, single Intel Xeon E6520
>            Reporter: Emiel Suilen
>            Severity: Critical
>         Attachments: bt, bt_full
>
>
> In an environment with many calls (>4k calls/24 hours)  and full logging turned on, our customer experiences occasional crashes. A backtrace of the core dump shows this happens during channel creation, and that the pointer used for the channel is overwriting a string used by the logger.
> Attached are the backtrace, full backtrace, and an examination of the relevant frame in GDB, which shows that the allocated pointer already holds information, that starts several blocks earlier.

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