Index: src/VBox/Additions/linux/sharedfolders/vfsmod.c
===================================================================
--- a/src/VBox/Additions/linux/sharedfolders/vfsmod.c	(revision 103066)
+++ b/src/VBox/Additions/linux/sharedfolders/vfsmod.c	(revision 103067)
@@ -473,8 +473,7 @@
 
         path->u16Length = 1;
         path->u16Size = 2;
-        path->String.utf8[0] = '/';
-        path->String.utf8[1] = 0;
+        RTStrCopy(path->String.utf8, path->u16Size, "/");
 
         /*
          * Stat the root directory (for inode info).
Index: src/VBox/Additions/linux/sharedfolders/dirops.c
===================================================================
--- a/src/VBox/Additions/linux/sharedfolders/dirops.c	(revision 103066)
+++ b/src/VBox/Additions/linux/sharedfolders/dirops.c	(revision 103067)
@@ -492,7 +492,7 @@
             cchSrcName = pEntry->name.u16Length;
             AssertLogRelBreak(offEntryInBuf + RT_UOFFSETOF(SHFLDIRINFO, name.String) + cbSrcName <= cbValid);
             AssertLogRelBreak(cchSrcName < cbSrcName);
-            AssertLogRelBreak(pEntry->name.String.ach[cchSrcName] == '\0');
+            AssertLogRelBreak(*(pEntry->name.String.ach + cchSrcName) == '\0');
 
             /*
              * Filter out '.' and '..' entires.
@@ -500,7 +500,7 @@
             if (   cchSrcName > 2
                 || pEntry->name.String.ach[0] != '.'
                 || (   cchSrcName == 2
-                    && pEntry->name.String.ach[1] != '.')) {
+                    && *(pEntry->name.String.ach + 1) != '.')) {
                 int const   d_type = vbsf_get_d_type(pEntry->Info.Attr.fMode);
                 ino_t const d_ino  = (ino_t)offPos + 0xbeef; /* very fake */
                 bool        fContinue;
Index: src/VBox/Additions/linux/sharedfolders/utils.c
===================================================================
--- a/src/VBox/Additions/linux/sharedfolders/utils.c	(revision 103066)
+++ b/src/VBox/Additions/linux/sharedfolders/utils.c	(revision 103067)
@@ -1047,9 +1047,9 @@
         RT_BCOPY_UNFORTIFIED(&tmp->String.utf8[0], d_name, d_len + 1);
     else {
         RT_BCOPY_UNFORTIFIED(&tmp->String.utf8[0], p_name, p_len);
-        tmp->String.utf8[p_len] = '/';
-        RT_BCOPY_UNFORTIFIED(&tmp->String.utf8[p_len + 1], d_name, d_len);
-        tmp->String.utf8[p_len + 1 + d_len] = '\0';
+        *(tmp->String.utf8 + p_len) = '/';
+        RT_BCOPY_UNFORTIFIED(tmp->String.utf8 + p_len + 1, d_name, d_len);
+        *(tmp->String.utf8 + p_len + 1 + d_len) = '\0';
     }
 
     *result = tmp;
Index: include/VBox/VBoxGuestLibSharedFoldersInline.h
===================================================================
--- a/include/VBox/VBoxGuestLibSharedFoldersInline.h	(revision 103066)
+++ b/include/VBox/VBoxGuestLibSharedFoldersInline.h	(revision 103067)
@@ -1505,7 +1505,7 @@
             pReq->StrPath.u16Length = (uint16_t)cchPath;
             pReq->StrPath.u16Size   = (uint16_t)cchPath + 1;
             RT_BCOPY_UNFORTIFIED(pReq->StrPath.String.ach, pszPath, cchPath);
-            pReq->StrPath.String.ach[cchPath] = '\0';
+            *(pReq->StrPath.String.ach + cchPath) = '\0';
 
             {
                 int vrc = VbglR0SfHostReqReadLinkContig(idRoot, pvBuf, PhysBuffer, cbBuffer, pReq);