Can you run kamailio as root user for testing and before set also:
``` ulimit -c unlimited ```
In order to get the corefile of the crash. Depending on your OS, the core file can be dumped in different location. If it is not in the `/` or the working directory set for Kamailio, you have to search on the web to find out where it written by OS. It might even be sent to some application. For example, for Ubuntu, useful details can be found at:
- https://askubuntu.com/questions/1349047/where-do-i-find-core-dump-files-and-...
Once you have the corefile, get the output of `bt full` with `gdb` and post it here.