Corpus for add_key:

Coverage	Program
1339	perf_event_open-add_key$keyring-add_key$keyring-sendmsg$nl_xfrm-add_key
1260	add_key$user-add_key$keyring-add_key$keyring-add_key
1129	perf_event_open-add_key$keyring-add_key
1102	request_key-add_key
1017	ioctl$AUTOFS_DEV_IOCTL_CATATONIC-perf_event_open-io_setup-add_key$keyring-add_key$keyring-add_key$keyring-add_key$keyring-add_key-request_key-add_key$keyring-add_key$keyring-add_key-creat
950	add_key$keyring-add_key$keyring-add_key
814	add_key$keyring-add_key
786	add_key$keyring-add_key
782	add_key$keyring-add_key
666	perf_event_open-add_key$keyring-add_key
661	add_key$keyring-add_key
605	add_key
576	perf_event_open-sched_setaffinity-add_key$keyring-add_key$keyring-add_key
535	add_key$keyring-add_key
506	msgget$private-msgrcv-perf_event_open-msgget-getsockopt$sock_cred-add_key-keyctl$chown-fstat-msgctl$IPC_SET-msgctl$IPC_RMID
459	add_key
417	add_key
396	add_key
373	add_key$keyring-add_key
341	mmap-add_key
337	creat-add_key$keyring-add_key
301	add_key
296	add_key$keyring-keyctl$chown-add_key
265	add_key$keyring-add_key
243	add_key
102	add_key