[customer] the rhels7.2 diskful installation with kernel and kernel modules updated by"geninitrd" failed with "Pane is dead" inside anaconda

[immarvin]

The installation failed with:

=====================

Starting installer, one moment...
libkmod: kmod_module_insert_module: could not find module by name='bnx2i'
libkmod: kmod_module_insert_module: could not find module by name='bnx2i'
libkmod: kmod_module_insert_module: could not find module by name='bnx2i'
libkmod: kmod_module_insert_module: could not find module by name='bnx2i'
anaconda 21.48.22.56-1 for Red Hat Enterprise Linux 7.2 started.
 * installation log files are stored in /tmp during the installation
 * shell is available on TTY2
  File "/sbin/anaconda", line 1156, in <module>
    setupDisplay(anaconda, opts, addon_paths)
  File "/sbin/anaconda", line 680, in setupDisplay
    anaconda.initInterface(addons)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/anaconda.py", line 220, in initInterface
    self._intf = TextUserInterface(self.storage, self.payload,
  File "/usr/lib64/python2.7/site-packages/pyanaconda/anaconda.py", line 168, in storage
    self._storage.setDefaultFSType(self.instClass.defaultFS)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1751, in setDefaultFSType
    self._check_valid_fstype(newtype)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1726, in _check_valid_fstype
    raise ValueError("new value %s is not valid as a default fs type" % fmt)
ValueError: new value non-existent xfs filesystem is not valid as a default fs type
Exception AttributeError: "'NoneType' object has no attribute 'udev_unref'" in <bound method Context.__del__ of <pyudev.core.Context object at 0x3fff8b7e0c50>> ignored

Pane is dead
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1726, in _check_valid_fstype
    raise ValueError("new value %s is not valid as a default fs type" % fmt)
ValueError: new value non-existent xfs filesystem is not valid as a default fs type
Exception AttributeError: "'NoneType' object has no attribute 'udev_unref'" in <bound method Context.__del__ of <pyudev.core.Context object at 0x3fff8b7e0c50>> ignored
Pane is dead
===================== 

[immarvin]

with geninitrd, the kernel and kernel modules inside initrd.img are updated, however, the kernel modules inside the squashfs.img, in which the anaconda is run, is still not updated. This is the root cause of the issue.

[immarvin]

fixed in #1563