diff -Nuar linux-4.9.orig/fs/aufs/posix_acl.c linux-4.9/fs/aufs/posix_acl.c
--- linux-4.9.orig/fs/aufs/posix_acl.c	2017-04-09 09:33:00.155052337 +0300
+++ linux-4.9/fs/aufs/posix_acl.c	2017-04-09 09:34:03.760053849 +0300
@@ -1,5 +1,18 @@
 /*
  * Copyright (C) 2014-2016 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /*
@@ -36,6 +49,8 @@
 
 	/* always topmost only */
 	acl = get_acl(h_inode, type);
+	if (!IS_ERR_OR_NULL(acl))
+		set_cached_acl(inode, type, acl);
 
 out:
 	ii_read_unlock(inode);
@@ -77,8 +92,10 @@
 	ssz = au_sxattr(dentry, inode, &arg);
 	dput(dentry);
 	err = ssz;
-	if (ssz >= 0)
+	if (ssz >= 0) {
 		err = 0;
+		set_cached_acl(inode, type, acl);
+	}
 
 out:
 	return err;
diff -Nuar linux-4.9.orig/fs/aufs/xattr.c linux-4.9/fs/aufs/xattr.c
--- linux-4.9.orig/fs/aufs/xattr.c	2017-04-09 09:33:00.160052337 +0300
+++ linux-4.9/fs/aufs/xattr.c	2017-04-09 09:34:08.757053967 +0300
@@ -1,11 +1,26 @@
 /*
  * Copyright (C) 2014-2016 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /*
  * handling xattr functions
  */
 
+#include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
 #include <linux/xattr.h>
 #include "aufs.h"
 
@@ -309,7 +324,11 @@
 };
 
 static const struct xattr_handler *au_xattr_handlers[] = {
-	&au_xattr_handler,
+#ifdef CONFIG_FS_POSIX_ACL
+	&posix_acl_access_xattr_handler,
+	&posix_acl_default_xattr_handler,
+#endif
+	&au_xattr_handler, /* must be last */
 	NULL
 };