Odroid XU4 reboots at the 3rd concurrent process

[gbin]

So if I have a dumb script like:

$this->bbcode_second_pass_code('', '#!/usr/bin/python
a = 2
while True:
a = a * 2
')
in loop.py

and I do
loop.py& it is fine
loop.py&loop.py& fine
loop.py&loop.py&loop.py& -> instant reboot.

Reproducible 100%. It is very strange.

I have the kernel 3.10.96-2.

Thanks in advance if you have any idea how to debug that.

Guillaume