Corpus for keyctl$join:

Coverage	Program
606	add_key$keyring-keyctl$restrict_keyring-keyctl$join
428	perf_event_open-keyctl$join
394	keyctl$join-keyctl$join
386	perf_event_open-keyctl$join
364	keyctl$join
212	perf_event_open-keyctl$join
172	munmap-keyctl$join
164	newfstatat-setresuid-keyctl$join-keyctl$join