Description of problem:

The issue is found on F33 + mainline kernel-5.10.0 + kexec-tools-2.0.21-1.fc34.x86_64

[   11.132139] kdump[509]: saving vmcore-dmesg.txt complete
[   11.139957] kdump[511]: saving vmcore
[   11.247218] kdump.sh[512]: check_release: Can't get the kernel version.
[   11.257181] kdump.sh[512]: The kernel version is not supported.
[   11.265515] kdump.sh[512]: The makedumpfile operation may be incomplete.
[   11.277689] kdump.sh[512]: makedumpfile Failed.
[   11.418798] kdump[517]: saving vmcore failed
[   11.425941] systemd[1]: kdump-capture.service: Main process exited, code=exited, status=1/FAILURE
[   11.437598] systemd[1]: kdump-capture.service: Failed with result 'exit-code'.
[   11.447531] systemd[1]: Failed to start Kdump Vmcore Save Service.
[FAILED] Failed to start Kdump Vmcore Save Service.
See 'systemctl status kdump-capture.service' for details.
[   12.792440] kauditd_printk_skb: 14 callbacks suppressed
[   12.792443] audit: type=1130 audit(1609917929.196:32): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=kernel msg='unit=kdump-capture comm="sy'
[   11.500715] systemd[1]: kdump-capture.service: Triggering OnFailure= dependencies.
[   11.510528] systemd[1]: Stopped target Timers.
[  OK  ] Stopped target Timers.
[  OK  ] Stopped dracut pre-pivot and cleanup hook.


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Install F33 and kernel 5.10.0
2. dnf upgrade kexec-tools dracut systemd --enablerepo=updates-testing --enablerepo=fedora --releasever=34
3.

Actual results:


Expected results:


Additional info: