mmap(0): Illegal seek

[Debian Ghost <debian-isp@ghost.ntelos.net>]

Hey Guys,
I received this message in my system check.
I was wondering what this illegal seek is. Is this an attempt to exploit
ftpd? Looks like my wrappers kept them out, but I was wondering if there
was anything else to this...

thanks,

A. D. Ghost

Security Violations
=-=-=-=-=-=-=-=-=-=
Dec 28 06:00:17 ghost ftpd[1809]: mmap(0): Illegal seek
Dec 28 04:39:25 ghost in.ftpd[1631]: refused connect from
83.ppp1-4.worldonline.dk
Dec 28 05:01:11 ghost in.ftpd[1668]: refused connect from
83.ppp1-4.worldonline.dk
Dec 28 05:48:23 ghost in.ftpd[1796]: refused connect from
239d100.pool.vonl.net