Corpus for keyctl$join:

Coverage	Program
418	perf_event_open-keyctl$join
376	pkey_mprotect-keyctl$join
265	ioctl$AUTOFS_DEV_IOCTL_PROTOSUBVER-keyctl$join
130	mount$9p_fd-pkey_mprotect-keyctl$join
122	pkey_mprotect-keyctl$join