Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x7401c41a
fault code = supervisor read,page not present
instruction pointer =0x8:x0xc0211872
stakc pointer = 0x10:0xd1dcae98
frame pointer = 0x10:0xd1dcae98
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 = 6 (syncer)
interrupt mask = bio
trap number = 12
panic: page fault

このようなエラーメッセージが出て落ちました。
ページフォルトの様なのですが、何が原因かわかりますか？