Public bug reported:

$ cat /proc/cmdline 
network-config={config:disabled} 
ip=10.245.236.14::10.245.236.1:255.255.255.0:s1lp14:encc000.2653:none:10.245.236.1
 vlan=encc000.2653:encc000 
url=ftp://10.13.0.2:21/ubuntu-live-server-20.04/focal-live-server-s390x.iso --- 
quiet 

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 653, in 
status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 362, in 
main_init
    init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL))
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 678, in 
apply_network_config
    netcfg, src = self._find_networking_config()
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 637, in 
_find_networking_config
    NetworkConfigSource.cmdline: cmdline.read_kernel_cmdline_config(),
  File "/usr/lib/python3/dist-packages/cloudinit/net/cmdline.py", line 276, in 
read_kernel_cmdline_config
    return util.load_yaml(_b64dgz(data64))
  File "/usr/lib/python3/dist-packages/cloudinit/net/cmdline.py", line 256, in 
_b64dgz
    blob = base64.b64decode(b64str)
  File "/usr/lib/python3.7/base64.py", line 87, in b64decode
    return binascii.a2b_base64(s)
binascii.Error: Incorrect padding

$ dpkg -l | grep cloud-init
ii  cloud-init                     19.4-56-g06e324ff-0ubuntu1        all        
  initialization and customization tool for cloud instances


However:

$ cat /proc/cmdline 
network-config=e2NvbmZpZzogZGlzYWJsZWR9 
ip=10.245.236.14::10.245.236.1:255.255.255.0:s1lp14:encc000.2653:none:10.245.236.1
 vlan=encc000.2653:encc000 
url=ftp://10.13.0.2:21/ubuntu-live-server-20.04/focal-live-server-s390x.iso --- 
quiet 

works fine (i.e. b64encoded)

This is on s390x

** Affects: cloud-init (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: s390x

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https://bugs.launchpad.net/bugs/1862702

Title:
  cannot disable cloud-init networking despite trying hard

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