Corpus for add_key:

Coverage	Program
6576	mkdirat$cgroup_root-uname-perf_event_open-add_key$keyring-add_key$keyring-add_key-clone3
1532	add_key-clone3
1301	socket$nl_xfrm-getsockopt$sock_cred-setuid-add_key$keyring-add_key$keyring-add_key
1283	mkdirat$cgroup_root-perf_event_open-add_key$keyring-request_key-keyctl$restrict_keyring-add_key$keyring-add_key-perf_event_open-poll
1138	perf_event_open-add_key$keyring-add_key
1060	sendmsg$nl_xfrm-add_key$keyring-add_key$keyring-add_key
830	perf_event_open-add_key$keyring-add_key$keyring-add_key
615	add_key$keyring-add_key$keyring-add_key-keyctl$read
474	add_key
472	perf_event_open-add_key
468	perf_event_open-add_key$keyring-keyctl$KEYCTL_RESTRICT_KEYRING-add_key
443	add_key
439	perf_event_open-add_key
362	add_key$keyring-add_key
361	add_key
342	add_key
322	add_key-keyctl$setperm-add_key
315	request_key-add_key
302	add_key$user-add_key$keyring-add_key
300	add_key
213	add_key
128	add_key
40	add_key
10	add_key