[asterisk-bugs] [JIRA] (ASTERISK-24155) Non-portable and non-reliable recursion detection in ast_malloc

[Timo Teräs (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-24155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timo Teräs updated ASTERISK-24155:
----------------------------------

    Attachment: musl-outofmem-handling.patch

One alternate way to detect recursive malloc failures.

> Non-portable and non-reliable recursion detection in ast_malloc
> ---------------------------------------------------------------
>
>                 Key: ASTERISK-24155
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24155
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Core/General, Core/Portability
>    Affects Versions: 12.4.0
>            Reporter: Timo Teräs
>         Attachments: musl-outofmem-handling.patch
>
>
> Great care was earlier taken to not depend on execinfo.h's backtrace() which is non-portable. It was used if available, but it was not required. But now an unconditional core code dependency to it was added.
> This is also non-reliable on certain hardware architectures if the binary is fully stripped as there is no unwind information present. 
> Basically the function is used for purposes it should never be used for. Please replace the recursive call logic with something better. See attached patch for one suggestions.



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