Created attachment 1089317 [details]
Patch to handle kexec action as reboot in halt_now()

Description of problem:
If I load a kernel image using kexec -l, and then attempt to reboot the machine (NOTE systemctl reboot, not systemctl kexec which works), the reboot fails and drops to debug shell.

Version-Release number of selected component (if applicable):
systemd-219-25.fc22.x86_64
dracut-041-14.fc22.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Load a kexec kernel: kexec -l <kernel> --append=<cmdline> --initrd=<initrd>
2. Reboot: systemctl reboot

Actual results:
dracut's shutdown script calls reboot, which fails, and drops to debug shell

Code should not be reached 'Unknown action." at ../src/systemctl/systemctl.c:7353, function halt_now(). Aborting.
/shutdown: line 109: 29616 Aborted
dracut Warning: reboot failed!
....
Dropping to debug shell.


Expected results:
system should reboot

Additional info:
I actually logged an issue upstream, but then found my freedesktop.org tree (from the README) was old, and this issue is fixed in the github.com tree.

The bug is caused by systemctl (which reboot links to) detecting the loaded kexec image, and changing the reboot action to kexec.  However, the halt_now() function doesn't handle the kexec action and aborts.

The fix on upstream is one line, just handle kexec like reboot in this case (ie. not actually kexec the system).

I've attached a patch from upstream...