Fatal trap 12: page fault while in kernel mode

On -current few hours before, I got a panic and could not into ddb.


acpi_cpu: throttling enabled, 2 steps (100% to 50.0%), currently 100.0%
ad0: 76319MB <ST380021A> [155061/16/63] at ata0-master UDMA100
ad1: 39266MB <IBM-DTLA-305040> [79780/16/63] at ata0-slave UDMA100
ad4: 58644MB <IC35L060AVER07-0> [119150/16/63] at ata2-master UDMA100
ad5: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata2-slave UDMA100
acd0: CD-RW <TOSHIBA DVD-ROM SD-R1002> at ata1-master PIO4
acd1: DVD-R <MATSHITADVD-RAM LF-D310> at ata1-slave PIO4
pass0 at ata1 bus 0 target 0 lun 0
pass0: <TOSHIBA DVD-ROM SD-R1002 1030> Removable CD-ROM SCSI-0 device 
pass0: 16.000MB/s transfers
pass1 at ata1 bus 0 target 1 lun 0
pass1: <MATSHITA DVD-RAM LF-D310 A116> Removable CD-ROM SCSI-0 device 
pass1: 16.000MB/s transfers
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s1a


Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic.id = 00000000
fault virtual address   = 0x38
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0226307
stack pointer           = 0x10:0xe121abbc
frame pointer           = 0x10:0xe121abd0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 4 (g_down)
kernel: type 12 trap, code=0



-- 
Jun Kuriyama <kuriyama_at_imgsrc.co.jp> // IMG SRC, Inc.
             <kuriyama_at_FreeBSD.org> // FreeBSD Project