kern/59215: npf crash at startup

[paul%whooppee.com@localhost]

>Number:         59215
>Category:       kern
>Synopsis:       npf crash at startup
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 26 10:45:00 +0000 2025
>Originator:     Paul Goyette
>Release:        NetBSD 10.99.12
>Organization:
+---------------------+--------------------------+----------------------+
| Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)           | 1B11 1849 721C 56C8 F63A | paul%whooppee.com@localhost    |
| Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | pgoyette%netbsd.org@localhost  |
| & Network Engineer  |                          | pgoyette99%gmail.com@localhost |
+---------------------+--------------------------+----------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 10.99.12 NetBSD 10.99.12 (GENERIC) #0: Wed Mar 19 03:32:11 UTC 2025 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
Something recently changed timing during system startup and as a
result I am getting crashes from npfctl.

I tried to start debugging but the printf's just hid the issue.

No crash dump available due to kern/59153

Here's a snippet of discussion on IRC:
>  18:37 < PaulG> ok, i got partial dmesg - looks pretty garbled in places,
> but mostly matches what i was able to manually transcribe.
>  18:37 < PaulG> [  25.226764file
> "/build/netbsd-local/src_ro/sys/miscfs/specfs/pec_vnops.c", line 1767
> cancel dev=0xc600 failed with 6
>  [...]
>  18:40 < Riastradh> #define ENXIO           6               /* Device not
> configured */
>  18:40 -!- PaulG [~pgoyette%c-76-103-137-75.hsd1.ca.comcast.net@localhost] has quit
> [Quit: ]
>  18:40 < Riastradh> major 0xc6 is /dev/npf
>  18:44 < Riastradh> When PaulG comes back -- I bet npf.kmod got unloaded
> before all open file descriptors /dev/npf were closed.
>  18:46 < Riastradh> I think npf_fini has to do
> vdevgone(cdevsw_lookup_major(&npf_cdevsw), 0, 0, VCHR), and npf_dev_open
> should reject minor(dev) != 0.

For now I have just disabled npf.
	
>How-To-Repeat:
	
>Fix:
	

>Unformatted: