Kernel log filled with unregister_netdevice: msgs

Description:
In our Kubernetes Cluster, with Calico network plugin we are using docker server 17.04.0-ce.
None of the container on worker node is using docker bridgedocker0. Either host or none docker network is being used.

Issue: the kernel log (kern.log) is getting filled with messages
unregister_netdevice: waiting for eth0 to become free. Usage count = 2
Every minute around 15 such messages are getting logged into the Kernel log

Output of docker version:

docker version
Client:
 Version:      17.04.0-ce
 API version:  1.28
 Go version:   go1.7.5
 Git commit:   4845c56
 Built:        Mon Apr  3 18:07:42 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.04.0-ce
 API version:  1.28 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   4845c56
 Built:        Mon Apr  3 18:07:42 2017
 OS/Arch:      linux/amd64
 Experimental: false

Output of docker info:

docker info
Containers: 260
 Running: 227
 Paused: 0
 Stopped: 33
Images: 25
Server Version: 17.04.0-ce
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 822
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: 
containerd version: 422e31ce907fd9c3833a38d7b8fdd023e5a76e73
runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228
init version: 949e6fa
Security Options:
 apparmor
 seccomp
  Profile: default
Kernel Version: 4.4.0-75-generic
Operating System: Ubuntu 16.04.2 LTS
OSType: linux
Architecture: x86_64

The report provides no repository file, test, or entry point. Start by reproducing the repeated unregister_netdevice messages with the stated Docker, Kubernetes, Calico, Ubuntu, and kernel versions, then trace the involved network lifecycle. Done means identifying the cause and preventing the recurring kernel-log messages without breaking container networking.