DF3173: mode=1 starting (PANIC variant: foreign-queue STAILQ_REMOVE)
DF3173: R01 T0 creator=userstat id=0 ar=0xfffff80118896200 home_tq=cpu4-queue key=k3173_r001
DF3173:   R01 t0.0 req=alive id=0 ref=1 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   R01 t0.6 req=alive id=0 ref=2 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   sleeper running on cpu4 until tick 2313 (now 2243)
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=0 tq=cpu4 cflags=1
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=1 tq=cpu4 cflags=0
DF3173:   R01 w req=alive id=0 ref=2 done=0 inprog=1 ta_pending=1 tq=cpu4 cflags=0
Fatal user address access from kernel mode from stat at ffffffff806a3895


Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic id = 0
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff806a3895
stack pointer	        = 0x10:0xfffff80117adf460
frame pointer	        = 0x10:0xfffff80117adf4a8
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 1089
current thread          = pri 10 (CRIT)
kernel: type 12 trap, code=0

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      taskqueue_cancel_locked+0x45:   movq    (%rcx),%rax
db>