explicitly close cursor if not needed anymore (GC can grab it late)

fail2ban/server/database.py

@@ -104,7 +104,11 @@ def commitandrollback(f):
 	def wrapper(self, *args, **kwargs):
 		with self._lock: # Threading lock
 			with self._db: # Auto commit and rollback on exception
-				return f(self, self._db.cursor(), *args, **kwargs)
+				cur = self._db.cursor()
+				try:
+					return f(self, cur, *args, **kwargs)
+				finally:
+					cur.close()
 	return wrapper
 
 
@@ -747,14 +751,15 @@ class Fail2BanDb(object):
 			query += " GROUP BY ip ORDER BY ip, timeofban DESC"
 		else:
 			query += " ORDER BY timeofban DESC LIMIT 1"
-		cur = self._db.cursor()
 		return cur.execute(query, queryArgs)
 
 	def getCurrentBans(self, jail = None, ip = None, forbantime=None, fromtime=None, maxmatches=None):
 		tickets = []
 		ticket = None
 
+		try:
 			with self._lock:
+				cur = self._db.cursor()
 				results = list(self._getCurrentBans(self._db.cursor(), 
 					jail=jail, ip=ip, forbantime=forbantime, fromtime=fromtime))
 
@@ -774,7 +779,8 @@ class Fail2BanDb(object):
 					# logSys.debug('restored ticket: %r', ticket)
 					if ip is not None: return ticket
 					tickets.append(ticket)
-
+		finally:
+			cur.close()
 		return tickets
 
 	@commitandrollback