panic() on Overdrive 3000

[Michael Tuexen]

Dear all,

I installed head of today on a Softiron Overdrive 3000. I'm trying to set the time 
using ntpdate_enable in /ertc/rc.conf.

Then the system panics:

Setting date via ntp.
 2 May 22:14:07 ntpdate[799]: step time server 193.175.73.151 offset -9911.674602 sec
panic: acquiring blockable sleep lock with spinlock or critical section held (sleep mutex) pmap @ /usr/home/tuexen/head/sys/arm64/arm64/pmap.c:4777
cpuid = 7
time = 1525292047
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
	 pc = 0xffff000000654f94  lr = 0xffff0000000dc318
	 sp = 0xffff00004026aab0  fp = 0xffff00004026acc0

db_trace_self_wrapper() at vpanic+0x1a8
	 pc = 0xffff0000000dc318  lr = 0xffff0000003731b4
	 sp = 0xffff00004026acd0  fp = 0xffff00004026ad80

vpanic() at kassert_panic+0x1bc
	 pc = 0xffff0000003731b4  lr = 0xffff000000372f60
	 sp = 0xffff00004026ad90  fp = 0xffff00004026ae40

kassert_panic() at witness_checkorder+0x140
	 pc = 0xffff000000372f60  lr = 0xffff0000003d3c1c
	 sp = 0xffff00004026ae50  fp = 0xffff00004026aec0

witness_checkorder() at __mtx_lock_flags+0xb0
	 pc = 0xffff0000003d3c1c  lr = 0xffff00000035335c
	 sp = 0xffff00004026aed0  fp = 0xffff00004026af10

__mtx_lock_flags() at pmap_fault+0x58
	 pc = 0xffff00000035335c  lr = 0xffff00000066d5e8
	 sp = 0xffff00004026af20  fp = 0xffff00004026af40

pmap_fault() at data_abort+0xa4
	 pc = 0xffff00000066d5e8  lr = 0xffff00000066f590
	 sp = 0xffff00004026af50  fp = 0xffff00004026b000

data_abort() at do_el1h_sync+0x11c
	 pc = 0xffff00000066f590  lr = 0xffff00000066f3e8
	 sp = 0xffff00004026b010  fp = 0xffff00004026b040

do_el1h_sync() at handle_el1h_sync+0x74
	 pc = 0xffff00000066f3e8  lr = 0xffff000000657074
	 sp = 0xffff00004026b050  fp = 0xffff00004026b160

handle_el1h_sync() at 0x83ffe24f88
	 pc = 0xffff000000657074  lr = 0x00000083ffe24f88
	 sp = 0xffff00004026b170  fp = 0xffff00004026b210

(null)() at 0x83ffe24fe4
	 pc = 0x00000083ffe24f88  lr = 0x00000083ffe24fe4
	 sp = 0xffff00004026b220  fp = 0xffff00004026b220

(null)() at 0x83ffe25170
	 pc = 0x00000083ffe24fe4  lr = 0x00000083ffe25170
	 sp = 0xffff00004026b230  fp = 0xffff00004026b250

(null)() at 0x83ffe26560
	 pc = 0x00000083ffe25170  lr = 0x00000083ffe26560
	 sp = 0xffff00004026b260  fp = 0xffff00004026b260

(null)() at 0x83ffe266f0
	 pc = 0x00000083ffe26560  lr = 0x00000083ffe266f0
	 sp = 0xffff00004026b270  fp = 0xffff00004026b2c0

(null)() at 0x83ffe20834
	 pc = 0x00000083ffe266f0  lr = 0x00000083ffe20834
	 sp = 0xffff00004026b2d0  fp = 0xffff00004026b2e0

(null)() at 0x83ffdfb508
	 pc = 0x00000083ffe20834  lr = 0x00000083ffdfb508
	 sp = 0xffff00004026b2f0  fp = 0xffff00004026b360

(null)() at 0x83ffdfc1ec
	 pc = 0x00000083ffdfb508  lr = 0x00000083ffdfc1ec
	 sp = 0xffff00004026b370  fp = 0xffff00004026b3b0

(null)() at 0x83ffdfbd9c
	 pc = 0x00000083ffdfc1ec  lr = 0x00000083ffdfbd9c
	 sp = 0xffff00004026b3c0  fp = 0xffff00004026b400

(null)() at 0x83ffde4f48
	 pc = 0x00000083ffdfbd9c  lr = 0x00000083ffde4f48
	 sp = 0xffff00004026b410  fp = 0xffff00004026b440

(null)() at 0x83ffde5750
	 pc = 0x00000083ffde4f48  lr = 0x00000083ffde5750
	 sp = 0xffff00004026b450  fp = 0xffff00004026b490

(null)() at 0x83ffde788c
	 pc = 0x00000083ffde5750  lr = 0x00000083ffde788c
	 sp = 0xffff00004026b4a0  fp = 0xffff00004026b4d0

(null)() at 0x83ffde9fd8
	 pc = 0x00000083ffde788c  lr = 0x00000083ffde9fd8
	 sp = 0xffff00004026b4e0  fp = 0xffff00004026b590

(null)() at 0x83ffdea2fc
	 pc = 0x00000083ffde9fd8  lr = 0x00000083ffdea2fc
	 sp = 0xffff00004026b5a0  fp = 0xffff00004026b6b0

(null)() at 0x83ffda670c
	 pc = 0x00000083ffdea2fc  lr = 0x00000083ffda670c
	 sp = 0xffff00004026b6c0  fp = 0xffff00004026b700

(null)() at 0x83ffda6edc
	 pc = 0x00000083ffda670c  lr = 0x00000083ffda6edc
	 sp = 0xffff00004026b710  fp = 0xffff00004026b740

(null)() at 0x83ffda4560
	 pc = 0x00000083ffda6edc  lr = 0x00000083ffda4560
	 sp = 0xffff00004026b750  fp = 0xffff00004026b780

(null)() at efi_set_time+0x90
	 pc = 0x00000083ffda4560  lr = 0xffff00000011fb00
	 sp = 0xffff00004026b790  fp = 0xffff00004026b7d0

efi_set_time() at efirtc_settime+0xc0
	 pc = 0xffff00000011fb00  lr = 0xffff0000001205e4
	 sp = 0xffff00004026b7e0  fp = 0xffff00004026b830

efirtc_settime() at settime_task_func+0xc0
	 pc = 0xffff0000001205e4  lr = 0xffff0000003befc8
	 sp = 0xffff00004026b840  fp = 0xffff00004026b860

settime_task_func() at taskqueue_run_locked+0x104
	 pc = 0xffff0000003befc8  lr = 0xffff0000003c80d4
	 sp = 0xffff00004026b870  fp = 0xffff00004026b8e0

taskqueue_run_locked() at taskqueue_thread_loop+0x9c
	 pc = 0xffff0000003c80d4  lr = 0xffff0000003c8f38
	 sp = 0xffff00004026b8f0  fp = 0xffff00004026b910

taskqueue_thread_loop() at fork_exit+0x7c
	 pc = 0xffff0000003c8f38  lr = 0xffff000000335944
	 sp = 0xffff00004026b920  fp = 0xffff00004026b950

fork_exit() at fork_trampoline+0x10
	 pc = 0xffff000000335944  lr = 0xffff00000066f13c
	 sp = 0xffff00004026b960  fp = 0x0000000000000000

Any idea what is wrong?

Best regards
Michael