Corpus for keyctl$update:

Coverage	Program
1007	request_key-add_key$keyring-keyctl$update-add_key$keyring-add_key$keyring-perf_event_open-clone3-openat-dup2-openat-sendfile-add_key$keyring-keyctl$setperm-keyctl$get_security-getuid-keyctl$chown-request_key-setsockopt$SO_TIMESTAMPING-request_key-keyctl$search
665	add_key$keyring-add_key$fscrypt_v1-keyctl$update
357	perf_event_open-add_key$fscrypt_v1-keyctl$update
355	add_key$fscrypt_v1-perf_event_open-keyctl$update
263	add_key$keyring-keyctl$update
251	keyctl$update-request_key-perf_event_open-request_key-add_key$keyring-keyctl$unlink-keyctl$KEYCTL_RESTRICT_KEYRING
201	keyctl$update
149	keyctl$update
36	keyctl$update