npf related panic

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

Just updated the kernel of a box which had kernel+userland 7.99.51/amd64,
with a kernel built just now, so 7.99.54. On boot (fat fingered):

...
Starting dhcpcd.
uvm_fault(0xffffffe811642e170, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff804966e9 cs 8 rflags 10246 cr2 18 ilevel 6 rsp fffffe8116594a10
curlwp 0xfffffe8116c87040 pid 135.1 lowest kstack 0xfffffe81165912c0
kernel: page fault trap, code=0
Stopped in pid 135.1 (dhcpd) at netbsd:npf_ifaddrhook+0x55: movq 18($r12),%rsi
npf_ifaddrhook() at netbsd:npf_ifaddrhook+0x55
pfil_run_addrhooks() at netbsd:pfil_run_addrhooks+0x3a
in6_control() at netbsd:in6_control+0x67d
udp6_ioctl_wrapper() at netbsd:udp6_ioctl_wrapper+0x32
doifioctl() at netbsd:doifioctl+0xbb3
soo_ioctl() at netbsd:soo_ioctl+0x2b5
sys_ioctl() at netbsd:sys_ioctl+0x101
syscall() at netbsd:syscall+0x1e8
--- syscall (number 54) ---

(so didn't manage to boot, to bring userland into sync - this is a DIAGNOSTIC,
DEBUG, LOCKDEBUG kernel)

Cheers,

Patrick