=== DF-0724 trigger PoC (fixed netbt.ko with atomic_cmpset_short CAS) ===
=== guest: DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026 ===
=== netbt.ko: fixed module with atomic_cmpset_short on rd_state CLOSED transition ===

--- run 1 ---
socket(RFCOMM) = 3 OK
bind OK
connect FAIL errno=65 (No route to host)
=> no HCI unit / BT adapter; L2CAP link cannot be established; RFCOMM session unreachable
done
RUN1_EXIT=0
--- run 2 ---
socket(RFCOMM) = 3 OK
bind OK
connect FAIL errno=65 (No route to host)
=> no HCI unit / BT adapter; L2CAP link cannot be established; RFCOMM session unreachable
done
RUN2_EXIT=0
--- run 3 ---
socket(RFCOMM) = 3 OK
bind OK
connect FAIL errno=65 (No route to host)
=> no HCI unit / BT adapter; L2CAP link cannot be established; RFCOMM session unreachable
done
RUN3_EXIT=0

=== CONCLUSION: race path unreachable (no BT adapter / HCI unit) ===
=== connect() fails EHOSTUNREACH both before and after fix ===
=== fix validated: applies + compiles (rc=0, -Werror) + loads + no regression ===