Corpus for mknodat$null:

Coverage	Program
2343	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-mknodat$null
2220	mknodat$null-fork-ptrace$setregs
1670	perf_event_open-syz_mount_image$ext4-mount-openat$dir-mknodat$null
529	syz_open_procfs-mknodat$null
234	perf_event_open-mknodat$null