kern/60183: kernel assertion fired while updating NFS root

["martin%NetBSD.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60183
>Category:       kern
>Synopsis:       kernel assertion fired while updating NFS root
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 10 15:15:00 +0000 2026
>Originator:     Martin Husemann
>Release:        NetBSD 11.99.5
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 11.99.5 NetBSD 11.99.5 (UNPLUGED) #692: Fri Apr 10 16:33:22 CEST 2026 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earmv5
Machine: evbarm
>Description:

I unpacked new sets on the NFS server while the client was running.

The client logged:

Apr 10 16:50:03 unpluged dhcpcd[471]: script_status: /libexec/dhcpcd-run-hooks: WEXITSTATUS 127
[ 464847.9781944] panic: kernel diagnostic assertion "no_local_exec_lock || rw_lock_held(&exec_lock)" failed: file "../../../../kern/kern_exec.c", line 1200 
[ 464847.9781944] cpu0: Begin traceback...
[ 464847.9781944] 0xd4c7ac7c: netbsd:db_panic+0x14
[ 464847.9781944] 0xd4c7ac9c: netbsd:vpanic+0x14c
[ 464847.9781944] 0xd4c7acb4: netbsd:kern_assert+0x3c
[ 464847.9781944] 0xd4c7ad34: netbsd:execve_runproc+0xb88
[ 464848.0182003] 0xd4c7aec4: netbsd:execve1+0x54
[ 464848.0182003] 0xd4c7aeec: netbsd:sys_execve+0x30
[ 464848.0182003] 0xd4c7afac: netbsd:syscall+0xa4
[ 464848.0182003] cpu0: End traceback...
[ 464848.0182003] rebooting...

Sounds like the script NFS handle became invalid, exec failed and ran through
a barely used error path...

>How-To-Repeat:
s/a

>Fix:
n/a