Suricata

When 'vars' section in configuration file is incorrect, a stack overflow error may occur. For instance:

vars:
HOME_NET: "!$HOME_NET"

This is undefined and recursive declaration. Suricata tries to resolve a variable, calling DetectAddressParse2() again and again until stack space is exhausted and segmentation fault occurs. No error messages are given and user can't see what went wrong.

Valgrind reports:

11392 Stack overflow in thread #1: can't grow stack to 0xffe801000
11392
11392 Process terminating with default action of signal 11 (SIGSEGV)