SGI IRIX before 6.5.21 allows local users to cause a denial of service (kernel panic) via a certain call to the PIOCSWATCH ioctl.
https://exchange.xforce.ibmcloud.com/vulnerabilities/12241
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-0171
http://www.securitytracker.com/id?1008770