panic in devfs_populate_loop()

After todays cvsup and buildworld/kernel I get a panic during boot.

Kernel from October 29th works fine. Maybe related to the latest ACPI-CA
import.

Panic string and backtrace hand-transcribed.

Fatal trap 12: page fault while in kernel mode

devfs_populate_loop()
devfs_populate()
devfs_lookup()
VOP_LOOKUP_APV()
lookup()
namei()
kern_symlink()
devfs_first()
vfs_mountroot()
start_init
fork_exit()
fork_trampoline()

dmesg from kernel.old:
Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 7.0-CURRENT #41: Sat Oct 29 12:46:27 CEST 2005
    stefan_at_something.pepperland:/usr/obj/usr/src/sys/SOMETHING
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) M processor 1.60GHz (1598.65-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x6d6  Stepping = 6

Features=0xafe9fbbf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,PBE>
  Features2=0x180<EST,TM2>
real memory  = 502136832 (478 MB)
avail memory = 481828864 (459 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <TOSCPL <> on motherboard
acpi0: Power Button (fixed)
pci_link0: <ACPI PCI Link LNKA> irq 10 on acpi0
pci_link1: <ACPI PCI Link LNKB> irq 11 on acpi0
pci_link2: <ACPI PCI Link LNKC> irq 5 on acpi0
pci_link3: <ACPI PCI Link LNKD> irq 7 on acpi0
pci_link4: <ACPI PCI Link LNKE> irq 4 on acpi0
pci_link5: <ACPI PCI Link LNKF> irq 11 on acpi0
pci_link6: <ACPI PCI Link LNKG> irq 11 on acpi0
pci_link7: <ACPI PCI Link LNKH> irq 3 on acpi0
acpi_ec0: <Embedded Controller: GPE 0x1c> port 0x62,0x66 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
cpu0: <ACPI CPU> on acpi0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pci0: <base peripheral> at device 0.1 (no driver attached)
pci0: <base peripheral> at device 0.3 (no driver attached)
agp0: <Intel 82855GME (855GME GMCH) SVGA controller> port 0x1800-0x1807
mem 0xe8000000-0xefffffff,0xe0000000-0xe007ffff irq 10 at device 2.0 on
pci0
agp0: detected 32636k stolen memory
agp0: aperture size is 128M
pci0: <display> at device 2.1 (no driver attached)
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0x1820-0x183f
irq 10 at device 29.0 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82801DB (ICH4) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801DB (ICH4) USB controller USB-B> port 0x1840-0x185f
irq 7 at device 29.1 on pci0
uhci1: [GIANT-LOCKED]
usb1: <Intel 82801DB (ICH4) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801DB (ICH4) USB controller USB-C> port 0x1860-0x187f
irq 5 at device 29.2 on pci0
uhci2: [GIANT-LOCKED]
usb2: <Intel 82801DB (ICH4) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
pci0: <serial bus, USB> at device 29.7 (no driver attached)
pcib1: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib1
fwohci0: <VIA Fire II (VT6306)> port 0x3400-0x347f mem
0xe0201000-0xe02017ff irq 4 at device 0.0 on pci2
fwohci0: OHCI version 1.10 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:02:3f:4c:65:40:8a:64
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc000ffc0, gen=1, CYCLEMASTER mode
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
rl0: <RealTek 8139 10/100BaseTX> port 0x3000-0x30ff mem
0xe0201800-0xe02018ff irq 11 at device 1.0 on pci2
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: Ethernet address: 00:0f:b0:3c:bd:b9
iwi0: <Intel(R) PRO/Wireless 2200BG> mem 0xe0200000-0xe0200fff irq 10 at
device 2.0 on pci2
iwi0: Ethernet address: 00:0e:35:ac:9b:f0
cbb0: <ENE CB710 PCI-CardBus Bridge> at device 4.0 on pci2
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
pci2: <memory, flash> at device 4.1 (no driver attached)
pci2: <base peripheral> at device 4.2 (no driver attached)
pci2: <memory, flash> at device 4.3 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH4 UDMA100 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1810-0x181f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
pcm0: <Intel ICH4 (82801DB)> port 0x1c00-0x1cff,0x18c0-0x18ff mem
0xe0100c00-0xe0100dff,0xe0100800-0xe01008ff irq 11 at device 31.5 on
pci0
pcm0: [GIANT-LOCKED]
pcm0: <Unknown AC97 Codec (id = 0x414c4752)>
pci0: <simple comms, generic modem> at device 31.6 (no driver attached)
acpi_acad0: <AC Adapter> on acpi0
battery0: <ACPI Control Method Battery> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model GlidePoint, device ID 0
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem
0xc0000-0xccfff,0xcd000-0xcdfff,0xd6000-0xd67ff,0xe0000-0xe3fff pnpid
ORM0000 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on
isa0
Timecounter "TSC" frequency 1598648877 Hz quality 800
Timecounters tick every 1.000 msec
ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding
disabled, default to accept, logging limited to 100 packets/entry by
default
ad0: 76319MB <IC25N080ATMR04 0 MO4OAD4A> at ata0-master UDMA100
acd0: DVDR <MATSHITADVD-RAM UJ-830S/1.50> at ata1-master UDMA33
Trying to mount root from ufs:/dev/ad0s1a
cd0 at ata1 bus 0 target 0 lun 0
cd0: <MATSHITA DVD-RAM UJ-830S 1.50> Removable CD-ROM SCSI-0 device 
cd0: 33.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
iwi0: Please load firmware
rl0: link state changed to DOWN
iwi0: link state changed to UP