diff -Naur psm-4abbc60/psm_ep.c psm-4abbc60-edit/psm_ep.c
--- psm-4abbc60/psm_ep.c	2020-07-02 14:18:23.738500086 +0800
+++ psm-4abbc60-edit/psm_ep.c	2020-07-02 14:22:39.097969891 +0800
@@ -1349,8 +1349,7 @@
 
     b_new = (char *) devstr;
     e = b_new + len;
-    strncpy(e, devstring, len-1);
-    e[len-1] = '\0';
+    strncpy(e, devstring, len);
     ee = e + len;
     i = 0;
     while (e < ee && *e && i < PTL_MAX_INIT) {