do not accept "kernel messages" from userspace
grant CAP_IPC_OWNER-like access to the owner of the bus
test: cast addr to uintptr_t
test: benchmark - use sizeof(struct timeval)

Simon Peeters 12:41 PM:
I am happy to let you all know that the error is not in the kdbus
code, but in the test code which has 16 hardcoded as the size of struct
timeval.
limit the amount of request for a reply a connection can issue