What were you trying to do that didn't work?

Please provide the package NVR for which bug is seen:

[root@el10 0l-linear]# rpm -q mdadm
mdadm-4.3-1.el10.x86_64

How reproducible:

Steps to reproduce

1. [root@el10 0l-linear]# mdadm -CR /dev/md0 -l linear -n2 /dev/loop1 /dev/loop2
   mdadm: /dev/loop1 appears to be part of a raid array:
          level=linear devices=2 ctime=Fri Apr 19 15:29:06 2024
   mdadm: /dev/loop2 appears to be part of a raid array:
          level=linear devices=2 ctime=Fri Apr 19 15:29:06 2024
   mdadm: Defaulting to version 1.2 metadata
   mdadm: RUN_ARRAY failed: Invalid argument
   [root@el10 0l-linear]# rpm -q mdadm
   mdadm-4.3-1.el10.x86_64
2.  

Expected results

linear device created. without error.

Or

If not support linear anymore please gives out more clear error message.

Actual results

Got error, linear device didn't created.