Corpus for openat$pidfd:

Coverage	Program
1593	io_uring_register$IORING_UNREGISTER_EVENTFD-prctl$PR_GET_IO_FLUSHER-perf_event_open-perf_event_open$cgroup-ioctl$PERF_EVENT_IOC_PAUSE_OUTPUT-prctl$PR_GET_IO_FLUSHER-mknod$loop-syz_open_procfs-syz_io_uring_setup-io_uring_register$IORING_REGISTER_EVENTFD-socket$nl_generic-creat-openat$pidfd-ioctl$AUTOFS_DEV_IOCTL_EXPIRE-ioctl$BLKTRACESETUP
837	openat$pidfd