>>> SIGSEGV: kernel-equivalent NULL-pointer WRITE at 0x0
DF-4546 lifted-copy harness: lm_detach -> sensordev_deinstall of never-installed ksensordev (lm78.c:445-458 + sys/sys/queue.h:646)

=== CONTROL normal chip (numsensors=19) ===
  OK (clean, as expected)

=== BUG W83791SD zero-sensor attach (numsensors=0) ===
  NULL-WRITE FAULT REPRODUCED

REPRODUCED: zero-sensor attach + detach writes through NULL and corrupts sensordev_list.tqh_last