Corpus for mknod$loop:

Coverage	Program
2704	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-mknod$loop-truncate
2222	mknod$loop-creat
2071	mknod$loop-chown
1875	perf_event_open-mknod$loop-ioctl$PERF_EVENT_IOC_SET_FILTER-perf_event_open