Corpus for keyctl$unlink:

Coverage	Program
2791	fchown-perf_event_open-memfd_create-mmap-ioctl$NS_GET_OWNER_UID-add_key$fscrypt_v1-stat-keyctl$chown-add_key$keyring-keyctl$unlink-recvmsg$unix-stat-getgid-fork
595	perf_event_open-add_key$keyring-add_key$keyring-keyctl$unlink
316	perf_event_open-add_key$keyring-keyctl$unlink
306	add_key$keyring-keyctl$unlink
301	syz_open_procfs$namespace-ioctl$NS_GET_PARENT-perf_event_open-add_key$keyring-keyctl$unlink-add_key$keyring-ioctl$AUTOFS_DEV_IOCTL_OPENMOUNT-ioctl$NS_GET_USERNS-add_key$keyring-keyctl$chown-add_key-keyctl$KEYCTL_MOVE-openat$sr-add_key$keyring
289	perf_event_open-add_key$keyring-add_key$keyring-keyctl$unlink-ioctl$FS_IOC_GETFSMAP
225	add_key$keyring-add_key$fscrypt_v1-keyctl$unlink
45	keyctl$unlink