Corpus for keyctl$join:

Coverage	Program
436	perf_event_open-setresuid-keyctl$join-keyctl$read-ioctl$AUTOFS_DEV_IOCTL_PROTOVER-sendmsg$inet6-bind$inet6
435	perf_event_open-syz_genetlink_get_family_id$nl80211-keyctl$join
395	pkey_mprotect-keyctl$join
387	perf_event_open-keyctl$join-openat$full
129	mount$9p_fd-pkey_mprotect-keyctl$join
122	pkey_mprotect-keyctl$join