Corpus for keyctl$join:

Coverage	Program
382	perf_event_open-keyctl$join
362	add_key$keyring-keyctl$restrict_keyring-keyctl$join
354	perf_event_open-keyctl$join
338	newfstatat-setresuid-keyctl$join-keyctl$join
199	perf_event_open-keyctl$join-keyctl$join
194	perf_event_open-keyctl$join
188	keyctl$join-keyctl$join
164	munmap-keyctl$join