FreeBSD 12.0-CURRENT (GENERIC) #118 r334286M: Mon Jun  4 07:37:32 EDT 2018
root@rpi3:~ # Kernel page fault with the following non-sleepable locks held:
shared rm in_ifaddr_lock (in_ifaddr_lock) r = 0 (0xffff000000cef1f8) locked @ /usr/home/db/svn/system/head/sys/netinet/in.c:677
stack backtrace:
#0 0xffff0000003de434 at witness_debugger+0x64
#1 0xffff0000003df738 at witness_warn+0x3f4
#2 0xffff000000682d10 at data_abort+0x104
#3 0xffff000000682b08 at do_el1h_sync+0x11c
#4 0xffff00000066a074 at handle_el1h_sync+0x74
#5 0xffff00000049b020 at in_addprefix+0x54
#6 0xffff00000049a764 at in_control+0x888
#7 0xffff000000469bdc at ifioctl+0x7a8
#8 0xffff0000003e39c4 at kern_ioctl+0x358
#9 0xffff0000003e361c at sys_ioctl+0x158
#10 0xffff000000683328 at do_el0_sync+0x498
#11 0xffff00000066a1f4 at handle_el0_sync+0x74
  x0:                1
  x1:                0
  x2: ffff0000006fde7b
  x3:              2a5
  x4:                0
  x5: fffffd000171bc2e
  x6: 27b8f056a3eb27b8
  x7:    8f056a3eb27b8
  x8: fffffd000171bc00
  x9:                0
 x10:               18
 x11:                0
 x12: ffff000000c29b50
 x13: ffff000000c8e738
 x14:                0
 x15:               1c
 x16:         ffffffff
 x17: ffff000000b01b80
 x18: ffff0000536726b0
 x19: fffffd000171b800
 x20:                1
 x21:                a
 x22:               ff
 x23: fffffd000171b828
 x24: fffffd000171b8a8
 x25: fffffd00014d1000
 x26: fffffd000171b890
 x27:          1000193
 x28: fffffd000171b880
 x29: ffff000053672710
  sp: ffff0000536726b0
  lr: ffff00000049b024
 elr: ffff00000049b040
spsr:         80000345
 far:               70
 esr:         96000007
panic: data abort in critical section or under mutex
cpuid = 2
time = 1528152876
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
	 pc = 0xffff000000667fb4  lr = 0xffff0000000db510
	 sp = 0xffff0000536720a0  fp = 0xffff0000536722b0

db_trace_self_wrapper() at vpanic+0x1a8
	 pc = 0xffff0000000db510  lr = 0xffff00000037a35c
	 sp = 0xffff0000536722c0  fp = 0xffff000053672370

vpanic() at panic+0x44
	 pc = 0xffff00000037a35c  lr = 0xffff00000037a40c
	 sp = 0xffff000053672380  fp = 0xffff000053672400

panic() at data_abort+0x280
	 pc = 0xffff00000037a40c  lr = 0xffff000000682e8c
	 sp = 0xffff000053672410  fp = 0xffff0000536724c0

data_abort() at do_el1h_sync+0x11c
	 pc = 0xffff000000682e8c  lr = 0xffff000000682b08
	 sp = 0xffff0000536724d0  fp = 0xffff000053672500

do_el1h_sync() at handle_el1h_sync+0x74
	 pc = 0xffff000000682b08  lr = 0xffff00000066a074
	 sp = 0xffff000053672510  fp = 0xffff000053672620

bort() at do_el1h_sync+0x11c
	 pc = 0xffff000000682e8c  lr = 0xffff000000682b08
	 sp = 0xffff0000536724d0  fp = 0xffff000053672500

do_el1h_sync() at handle_el1h_sync+0x74
	 pc = 0xffff000000682b08  lr = 0xffff00000066a074
	 sp = 0xffff000053672510  fp = 0xffff000053672620

handle_el1h_sync() at in_addprefix+0x54
	 pc = 0xffff00000066a074  lr = 0xffff00000049b020
	 sp = 0xffff000053672630  fp = 0xffff000053672710

in_addprefix() at in_control+0x888
	 pc = 0xffff00000049b020  lr = 0xffff00000049a764
	 sp = 0xffff000053672720  fp = 0xffff0000536727a0

in_control() at ifioctl+0x7a8
	 pc = 0xffff00000049a764  lr = 0xffff000000469bdc
	 sp = 0xffff0000536727b0  fp = 0xffff000053672860

ifioctl() at kern_ioctl+0x358
	 pc = 0xffff000000469bdc  lr = 0xffff0000003e39c4
	 sp = 0xffff000053672870  fp = 0xffff0000536728c0

kern_ioctl() at sys_ioctl+0x158
	 pc = 0xffff0000003e39c4  lr = 0xffff0000003e361c
	 sp = 0xffff0000536728d0  fp = 0xffff0000536729a0

sys_ioctl() at do_el0_sync+0x498
	 pc = 0xffff0000003e361c  lr = 0xffff000000683328
	 sp = 0xffff0000536729b0  fp = 0xffff000053672a70

do_el0_sync() at handle_el0_sync+0x74
	 pc = 0xffff000000683328  lr = 0xffff00000066a1f4
	 sp = 0xffff000053672a80  fp = 0xffff000053672b90

handle_el0_sync() at 0x21684
	 pc = 0xffff00000066a1f4  lr = 0x0000000000021684
	 sp = 0xffff000053672ba0  fp = 0x0000ffffffffe260

KDB: enter: panic
[ thread pid 1112 tid 100122 ]
Stopped at      in_addprefix+0x74:      ldrb    w10, [x9, #112]
db>