Fatal trap 18: integer divide fault while in kernel mode
cpuid = 2; apic id = 02
instruction pointer     = 0x20:0xffffffff82bfa320
stack pointer           = 0x28:0xfffffe00e20c6900
frame pointer           = 0x28:0xfffffe00e20c6960
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 27 (vdev_open)
trap number             = 18
panic: integer divide fault
cpuid = 2
time = 16
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e20c6610
vpanic() at vpanic+0x182/frame fffffe00e20c6660
panic() at panic+0x43/frame fffffe00e20c66c0
trap_fatal() at trap_fatal+0x387/frame fffffe00e20c6720
trap() at trap+0x8e/frame fffffe00e20c6830
calltrap() at calltrap+0x8/frame fffffe00e20c6830
--- trap 0x12, rip = 0xffffffff82bfa320, rsp = 0xfffffe00e20c6900, rbp = 0xfffffe00e20c6960 ---
zio_wait() at zio_wait+0x60/frame 0xfffffe00e20c6960
vdev_open() at vdev_open+0x74d/frame 0xfffffe00e20c69c0
vdev_open_child() at vdev_open_child+0x1e/frame 0xfffffe00e20c69e0
taskq_run() at taskq_run+0x1f/frame 0xfffffe00e20c6a00
taskqueue_run_locked() at taskqueue_run_locked+0x181/frame 0xfffffe00e20c6a80
taskqueue_thread_loop() at taskqueue_thread_loop+0x118/frame 0xfffffe00e20c6ab0
fork_exit() at fork_exit+0x7d/frame 0xfffffe00e20c6af0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e20c6af0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 27 tid 100570 ]
Stopped at      kdb_enter+0x37: movq    $0,0x1091556(%rip)
db>