--- a/vboxpci/linux/VBoxPci-linux.c	2017-12-26 02:08:37.556625840 +0100
+++ a/vboxpci/linux/VBoxPci-linux.c	2017-12-26 02:09:02.735439598 +0100
@@ -357,7 +357,7 @@ 
 
     fs_save = get_fs();
     set_fs(get_ds());
-    ret = vfs_write(file, data, size, &offset);
+    ret = kernel_write(file, data, size, &offset);
     set_fs(fs_save);
     if (ret < 0)
         printk(KERN_DEBUG "vboxPciFileWrite: error %d\n", ret);