Fatal user address access from kernel mode from sysctl at ffffffff82606e66
Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
Stopped at      dfv_acam_sysctl+0x116:   movq    (%rax),%rcx
(trace: verbatim atapi_action XPT_RESET_DEV -> softc->atadev[0]->dev with atadev[0]=NULL, atapi-cam.c:432)