diff -r d0d933d61610 -r 7cea35f78b50 src/jdk.attach/linux/native/libattach/VirtualMachineImpl.c
--- a/src/jdk.attach/linux/native/libattach/VirtualMachineImpl.c	Thu May 31 15:37:18 2018 -0400
+++ b/src/jdk.attach/linux/native/libattach/VirtualMachineImpl.c	Thu May 31 14:09:04 2018 -0700
@@ -44,6 +44,8 @@
   } while((_result == -1) && (errno == EINTR)); \
 } while(0)
 
+#define ROOT_UID 0
+
 /*
  * Declare library specific JNI_Onload entry if static build
  */
@@ -156,11 +158,11 @@
         if (res == 0) {
             char msg[100];
             jboolean isError = JNI_FALSE;
-            if (sb.st_uid != uid) {
+            if (sb.st_uid != uid && uid != ROOT_UID) {
                 snprintf(msg, sizeof(msg),
                     "file should be owned by the current user (which is %d) but is owned by %d", uid, sb.st_uid);
                 isError = JNI_TRUE;
-            } else if (sb.st_gid != gid) {
+            } else if (sb.st_gid != gid && uid != ROOT_UID) {
                 snprintf(msg, sizeof(msg),
                     "file's group should be the current group (which is %d) but the group is %d", gid, sb.st_gid);
                 isError = JNI_TRUE;