A patch to compile vboxsf.ko for 3.8.x kernel with user namespace enabled.

vboxsf_utils.patch

--- vboxsf/utils.c.orig  2013-03-19 01:32:18.189109241 +0900
+++ vboxsf/utils.c	2013-03-19 01:38:19.403778661 +0900
@@ -144,8 +144,13 @@
 #endif
     }
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0) && defined(CONFIG_UIDGID_CONVERTED)
+    inode->i_uid = make_kuid(&init_user_ns, sf_g->uid);
+    inode->i_gid = make_kgid(&init_user_ns, sf_g->gid);
+#else
     inode->i_uid = sf_g->uid;
     inode->i_gid = sf_g->gid;
+#endif
     inode->i_size = info->cbObject;
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) && !defined(KERNEL_FC6)
     inode->i_blksize = 4096;