Corpus for openat$null:

Coverage	Program
864	preadv2-openat-fallocate-lseek-openat-ioctl$FS_IOC_RESVSP-faccessat2-ioctl$KDGKBSENT-lgetxattr-perf_event_open-openat-openat$null-sendfile
660	ioctl$AUTOFS_DEV_IOCTL_REQUESTER-socket$inet6_tcp-ioctl$BTRFS_IOC_INO_LOOKUP_USER-ioctl$sock_inet_SIOCDELRT-ioctl$BTRFS_IOC_START_SYNC-openat$null
650	openat$null-ioctl$sock_inet6_tcp_SIOCINQ-ioctl$AUTOFS_DEV_IOCTL_REQUESTER-mkdirat$binderfs
637	io_uring_setup-openat$null-ioctl$AUTOFS_DEV_IOCTL_REQUESTER-mkdirat$binderfs
632	openat$random-openat$null
529	openat$null