(guest, root)
cd /usr/src/sys/netgraph7/netgraph && make   -> netgraph.ko
cd ../socket  && make                        -> ng_socket.ko
cd ../bluetooth/bluetooth && make            -> ng_bluetooth.ko
cd ../hci && make                            -> ng_hci.ko   (0 errors)
cc -O2 -Wall -o poc_leak poc_leak.c          -> poc_leak    (0 errors, no warnings)
BUILD_OK