[Bug 262971] pfctl: can't start pf or clear rules, DIOCADDRULENV:

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 01 Apr 2022 07:03:41 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262971

            Bug ID: 262971
           Summary: pfctl: can't start pf or clear rules, DIOCADDRULENV:
           Product: Base System
           Version: 13.1-STABLE
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: dch@freebsd.org

Created attachment 232853
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=232853&action=edit
pf.conf

on reboot, pf doesn't start from rc.conf phase. I'm assuming this is some
malformed pf.conf on my side, but a line or rule # might help.

Enabling pfpfctl: DIOCADDRULENV: Invalid argument
/etc/rc: WARNING: Unable to load /etc/pf.conf.

pf.conf is attached:

# pfctl -vge -F all -f /etc/pf.conf
No ALTQ support in kernel
ALTQ related functions disabled
pfctl: pfctl_clear_eth_rules: Device busy

Seems to have broken between src commit aeb91e9 & 7d1ab86

a minimal test case is using pf.empty, literally an empty file:

# pfctl -vegf /etc/pf.empty
No ALTQ support in kernel
ALTQ related functions disabled
pfctl: pfctl_rules

# pfctl -F all
pfctl: pfctl_clear_eth_rules: Device busy

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