[Bug 1862300] [NEW] "systemctl kexec" reboots

[Alex Badea]

Public bug reported:

After the introduction of finalrd, "systemctl kexec" (with a kernel
preloaded by "kexec -l ...") no longer kexec()s -- it reboots instead.

Can be reproduced for example using a livecd (say, xubuntu-18.04
-desktop-amd64.iso):

sudo -i
apt-get update
apt-get install kexec-tools finalrd
systemctl start finalrd  # optional
kexec -l /cdrom/casper/vmlinuz
systemctl kexec

Expected results: the system kexec's into the kernel and panics (due to
lack of /init, since we haven't given it an initrd).

Actual results: the system reboots (e.g. the livecd's bootloader menu
runs).


If we don't install "finalrd" above, kexec works normally.

** Affects: finalrd (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: kexec-tools (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1862300

Title:
  "systemctl kexec" reboots

Status in finalrd package in Ubuntu:
  New
Status in kexec-tools package in Ubuntu:
  New

Bug description:
  After the introduction of finalrd, "systemctl kexec" (with a kernel
  preloaded by "kexec -l ...") no longer kexec()s -- it reboots instead.

  Can be reproduced for example using a livecd (say, xubuntu-18.04
  -desktop-amd64.iso):

  sudo -i
  apt-get update
  apt-get install kexec-tools finalrd
  systemctl start finalrd  # optional
  kexec -l /cdrom/casper/vmlinuz
  systemctl kexec

  Expected results: the system kexec's into the kernel and panics (due
  to lack of /init, since we haven't given it an initrd).

  Actual results: the system reboots (e.g. the livecd's bootloader menu
  runs).

  
  If we don't install "finalrd" above, kexec works normally.

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