diff -ru open-vm-tools-10.3.0-8931395-orig/hgfsmounter/hgfsmounter.c open-vm-tools-10.3.0-8931395/hgfsmounter/hgfsmounter.c
--- open-vm-tools-10.3.0-8931395-orig/hgfsmounter/hgfsmounter.c	2018-06-23 03:03:28.000000000 -0700
+++ open-vm-tools-10.3.0-8931395/hgfsmounter/hgfsmounter.c	2019-02-02 15:22:17.639393841 -0800
@@ -514,11 +514,13 @@
            HgfsMountInfo *mountInfo,   // OUT: mount data
            int *flags)                 // OUT: mount flags
 {
+   unsigned short fmask = 0;
    ASSERT(option);
    ASSERT(mountInfo);
 
-   if (ParseMask(option, &mountInfo->fmask)) {
-      LOG("Setting mount fmask to %o\n", mountInfo->fmask);
+   if (ParseMask(option, &fmask)) {
+      LOG("Setting mount fmask to %o\n", fmask);
+      mountInfo->fmask = fmask;
       return TRUE;
    }
 
@@ -548,11 +550,13 @@
            HgfsMountInfo *mountInfo,   // OUT: mount data
            int *flags)                 // OUT: mount flags
 {
+   unsigned short dmask = 0;
    ASSERT(option);
    ASSERT(mountInfo);
 
-   if (ParseMask(option, &mountInfo->dmask)) {
-      LOG("Setting mount dmask to %o\n", mountInfo->dmask);
+   if (ParseMask(option, &dmask)) {
+      LOG("Setting mount dmask to %o\n", dmask);
+      mountInfo->dmask = dmask;
       return TRUE;
    }