dfh: DF2225: arming once-window (flag=1, init NOT run)
dfh: DF2225: once=1; spawning delayed completer

Fatal user address access from kernel mode from sysctl at ffffffff809e55f8

Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic id = 1
fault virtual address	= 0x8
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff809e55f8
kernel: type 12 trap, code=0
Stopped at      _prop_rb_tree_find+0x18:	movq    0x8(%r15),%rbx