kern/60477: Wrong assertion in raid(4) reconstruction on hot spare

>Number:         60477
>Category:       kern
>Synopsis:       Wrong assertion in raid(4) reconstruction on hot spare
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 22 17:20:00 +0000 2026
>Originator:     Emmmanuel Nyarko
>Release:        netbsd current
>Organization:
NetBSD
>Environment:
amd64
>Description:
A wrong assertion is used when swapping components after a successful reconstruction of a failed disk unto a spare disk. This assertion triggers only when your kernel is compiled with RAID_DIAGNOSTIC. otherwise, you end up in a possible race condition because it doesn't get caught.  Needs pull-up to 11 and 10
>How-To-Repeat:
set up any raid level with a hot spare and fail one disk to be reconstructed unto the spare disk.
>Fix:
Yes, please!