We recently had a rather large botnet join our network.  One of my opers set a channel akill using the following alias: quote os akillchan kill +1h $0 Bots not welcome here As the 200+ akills expired, the log repeats the following message (albeit only 53 times): [Jun 13 21:05:16 2008] operserv/akill: BUG: (cancel_akill) Missing @ in mask: * Followed by... [Jun 13 21:05:16 2008] PANIC! signal 11 (no buffer) [Jun 13 21:05:16 2008] Services terminating: Segmentation fault: 11 [Jun 13 21:05:16 2008] FATAL: Caught signal 11 (Segmentation fault: 11) while shutting down Snotices sent: *** Global -- from <a href="http://services.XXXXX.net">services.XXXXX.net</a>: PANIC! signal 11 (no buffer) *** LocOps -- Server <a href="http://services.XXXXX.net">services.XXXXX.net</a>[xxx.xxx.xxx.xxx] closed the connection The cron kicked in and restarted services at 21:10:00.  Then the following snotice was sent after a couple of users identified to nickserv: 21:15:00 *** Global -- from <a href="http://services.XXXXX.net">services.XXXXX.net</a>: Warning: Databases are locked, and cannot be updated. Remove the `/home/Services/ircservices/lib/.lock' file to allow database updates. The .lock file was then deleted and things appear to be normal now.  Hopefully this info is useful.