Corpus for keyctl$restrict_keyring:

Coverage	Program
514	add_key$keyring-keyctl$restrict_keyring
352	perf_event_open-add_key$keyring-add_key$keyring-keyctl$restrict_keyring
337	add_key$keyring-keyctl$restrict_keyring
318	sendmmsg$inet6-perf_event_open-add_key$keyring-keyctl$restrict_keyring-syz_genetlink_get_family_id$netlbl_calipso
308	tkill-ptrace-wait4-add_key$keyring-keyctl$restrict_keyring
290	add_key$keyring-keyctl$restrict_keyring