Segmentation fault on 'ls'

[sv0]

Trying to test puszek-rootkit's features on Debiam 9 running in VMware.
Segmentation fault occurs on ls command if a directory contains file name which ends with FILE_SUFFIX

Host OS: Ubuntu 17.10 (4.13.0-37-generic #42-Ubuntu SMP)

Guest OS: Linux debian-9 4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02) x86_64 GNU/Linux running in VMware Workstation 14

user@debian-9:~$ ls

Message from syslogd@debian-9 at Mar 25 02:58:22 ...
 kernel:[12570.069868] usercopy: kernel memory exposure attempt detected from ffff9a66df18d500 (<wrapped address>) (18446744073709486297 bytes)
Segmentation fault