DF5102: enter
DF5102: product=0 biosver=0 (NULL == kenv entry absent)
DF5102: precondition met, calling kfreeenv as apple_fw.c:112-113 does -- expect panic
panic: trying to free NULL pointer
cpuid = 0
Trace beginning at frame 0xfffff8011846d788
_kfree() at _kfree+0x558 0xffffffff806583d8
_kfree() at _kfree+0x558 0xffffffff806583d8
df5102_load() at df5102_load+0x6e 0xffffffff8260106e
module_register_init() at module_register_init+0x49 0xffffffff806232e9
linker_load_file.part.3() at linker_load_file.part.3+0x1b9 0xffffffff80624619
linker_load_module() at linker_load_module+0x116 0xffffffff80625e16
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>
[guest wedged in DDB; ssh dead; vm.sh status => down]