moby: cp: preserving permissions for '/bar': Invalid argument

Description

After upgrading Docker for Mac to 1.13.0-rc7-beta37 (15013) from rc6, my build fails with an error from cp about preserving permissions when using -rp.

Steps to reproduce the issue:

1. Create this Dockerfile:

FROM ubuntu:16.04
RUN mkdir /foo
RUN cp -rp /foo /bar

1. docker build .

Describe the results you received:

Step 1/3 : FROM ubuntu:16.04
 ---> bd3d4369aebc
Step 2/3 : RUN mkdir /foo
 ---> Running in c05ee1ef5f1c
 ---> 923b0c9d9e85
Removing intermediate container c05ee1ef5f1c
Step 3/3 : RUN cp -rp /foo /bar
 ---> Running in 86cc22d02c92
cp: preserving permissions for '/bar': Invalid argument
The command '/bin/sh -c cp -rp /foo /bar' returned a non-zero code: 1

Describe the results you expected:

From Docker 1.12.3 on a different machine (this also worked with 1.13.0-rc5 and rc6):

Step 1 : FROM ubuntu:16.04
 ---> 104bec311bcd
Step 2 : RUN mkdir /foo
 ---> Running in 799277a89b9c
 ---> d806168b8014
Removing intermediate container 799277a89b9c
Step 3 : RUN cp -rp /foo /bar
 ---> Running in 57ea33a071d3
 ---> 0700a4b77202
Removing intermediate container 57ea33a071d3
Successfully built 0700a4b77202

Additional information you deem important (e.g. issue happens only occasionally):

This error appears after upgrading from 1.13.0-rc6 to rc7.

Output of docker version:

Client:
 Version:      1.13.0-rc7
 API version:  1.25
 Go version:   go1.7.3
 Git commit:   48a9e53
 Built:        Fri Jan 13 21:41:57 2017
 OS/Arch:      darwin/amd64

Server:
 Version:      1.13.0-rc7
 API version:  1.25 (minimum version 1.12)
 Go version:   go1.7.3
 Git commit:   48a9e53
 Built:        Fri Jan 13 21:41:57 2017
 OS/Arch:      linux/amd64
 Experimental: true

Output of docker info:

Containers: 99
 Running: 18
 Paused: 0
 Stopped: 81
Images: 594
Server Version: 1.13.0-rc7
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 696
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host ipvlan macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 03e5862ec0d8d3b3f750e19fca3ee367e13c090e
runc version: 2f7393a47307a16f8cee44a37b262e8b81021e3e
init version: 949e6fa
Security Options:
 seccomp
  Profile: default
Kernel Version: 4.9.3-moby
Operating System: Alpine Linux v3.5
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 2.934 GiB
Name: moby
ID: XKZB:LGXI:4HPS:6TPF:ZWNZ:JZAW:KG65:LFIP:SBM5:QMXF:23MQ:A6US
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): true
 File Descriptors: 147
 Goroutines: 130
 System Time: 2017-01-18T13:34:10.833485639Z
 EventsListeners: 1
Username: wojas
Registry: https://index.docker.io/v1/
Experimental: true
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

Additional environment details (AWS, VirtualBox, physical, etc.):

Using Docker for Mac

Version 1.13.0-rc7-beta37 (15013)
Channel: Beta
f2c3d3454f