CentOS - Dec 2017 - Centos7: backup with rsync problem: "rsync: rsync_xal_set: lremovexattr(""/tmp/test/etc/fstab"", "security.selinux") failed: Permission denied (13)"

If I run this command in order to backup /etc from remote server to
local dir I get a lot of this message:

    [root at s-virt tmp]# rsync -a --delete --numeric-ids --relative
--delete-excluded --compress --acls --xattrs  rsync://server-dati/root/etc/
/tmp/test/ -v
    receiving incremental file list
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/fstab"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/resolv.conf"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/rsyncd.conf"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/rsyncd.secrets"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/lvm/archive/dati_00001-728488062.vg"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/lvm/backup/dati"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/samba/.smb.conf.swp"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/samba/smb.conf"","security.selinux")
failed: Permission denied (13)
    rsync: rsync_xal_set:
lremovexattr(""/tmp/test/etc/systemd/system/multi-user.target.wants/rsyncd.service"","security.selinux")
failed: Permission denied (13)

    sent 671 bytes  received 49804 bytes  100950.00 bytes/sec
    total size is 30375007  speedup is 601.78
    rsync error: some files/attrs were not transferred (see previous errors)
(code 23) at main.c(1518) [generator=3.0.9]

I have also try to "setenforce 0" but the result is the same

It's possible to do a full backup of remote /etc with SElinux attrs to
a local dir?

Many thanks

-- 
Dario Lesca
(inviato dal mio Linux Fedora 27 Workstation)