Index: filed.c
==================================================================
--- filed.c
+++ filed.c
@@ -997,10 +997,13 @@
 		 * We have to make a duplicate FD, because once we release the cache
 		 * mutex, the file descriptor may be closed
 		 */
 		fd = dup(cache->fd);
 		if (fd < 0) {
+			close(cache->fd);
+			cache->fd = -1;
+
 			pthread_mutex_unlock(&cache->mutex);
 
 			return(NULL);
 		}