server: ensure that dus->name is always NULL terminated

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/server.c b/server.c
index 3346445..c2cf2dd 100644
--- a/server.c
+++ b/server.c
@@ -1095,7 +1095,8 @@
 {
 	int i;
 
-	strcpy((char *) dst->name, (char *) src->name);
+	dst->name[FIO_DU_NAME_SZ - 1] = '\0';
+	strncpy((char *) dst->name, (char *) src->name, FIO_DU_NAME_SZ - 1);
 
 	for (i = 0; i < 2; i++) {
 		dst->s.ios[i]		= cpu_to_le32(src->s.ios[i]);