--- ./source/private_module/nfsd/nfsctl.c	2018-12-24 01:23:48.000000000 +0000
+++ ./source/private_module/nfsd/nfsctl.c.hotpatch	2018-12-24 01:06:09.000000000 +0000
@@ -1297,7 +1297,7 @@
     (void)del_ip;
     (void)del_ip_str;
     /* sanity check */
-    if (size == 0)
+    if (size < 2)
     {
         return -EINVAL;
     }
@@ -1314,7 +1314,7 @@
     }
     del_ip = (u32)simple_strtoul(del_ip_str, NULL, 0);
     #endif
-    rc = nas_ip_to_sockaddr(buf, size, sap, salen);
+    rc = nas_ip_to_sockaddr(buf, size - 2, sap, salen);
     if (0 != rc)
     {
         return rc;
