Corpus for keyctl$update:
Coverage Program
1101 openat$sr-mmap-keyctl$update
319 add_key$fscrypt_v1-keyctl$update
133 keyctl$update-keyctl$get_keyring_id-keyctl$read-close_range-getsockopt$sock_cred-syz_usb_connect$cdc_ecm-timer_create-getsockopt$IP6T_SO_GET_REVISION_MATCH-timer_delete-timer_gettime-perf_event_open-timer_create-clone3
73 keyctl$update-request_key-add_key$keyring-keyctl$unlink