Corpus for keyctl$restrict_keyring:

Coverage	Program
630	add_key$keyring-keyctl$restrict_keyring-keyctl$chown
373	perf_event_open-add_key$keyring-add_key$keyring-keyctl$restrict_keyring
331	sendmmsg$inet6-perf_event_open-add_key$keyring-keyctl$restrict_keyring-syz_genetlink_get_family_id$netlbl_calipso
300	add_key$keyring-keyctl$restrict_keyring
276	keyctl$restrict_keyring
174	add_key$fscrypt_v1-keyctl$restrict_keyring
171	add_key$fscrypt_v1-keyctl$restrict_keyring
21	keyctl$restrict_keyring