Corpus for fcntl$dupfd:

Coverage	Program
2527	perf_event_open-socket$inet6_udp-connect$inet6-sendmsg$inet-connect$inet6-fcntl$dupfd-sendmsg$inet6-ioctl$sock_ipv6_tunnel_SIOCADDPRL-ioctl$CDROMREADTOCENTRY-mmap$IORING_OFF_CQ_RING-socket$inet_udp-ioctl$AUTOFS_DEV_IOCTL_SETPIPEFD-fcntl$F_GET_RW_HINT
2297	ioctl$F2FS_IOC_WRITE_CHECKPOINT-writev-recvmsg$unix-perf_event_open-syz_mount_image$ext4-mount-write$P9_RREADLINK-openat$procfs-fallocate-ioctl$FITRIM-umount2-ioctl$sock_bt_hci-mq_open-unlinkat-io_uring_enter-socket$inet_udplite-fcntl$dupfd-openat2$dir-perf_event_open
1175	perf_event_open-socket$inet6_udp-connect$inet6-fcntl$dupfd-write
126	socket$nl_xfrm-perf_event_open-socket$netlink-fcntl$dupfd-sendmsg$nl_generic
114	perf_event_open-syz_mount_image$ext4-getsockopt$inet_mreq-pkey_mprotect-setsockopt$inet6_tcp_TCP_FASTOPEN_KEY-syz_mount_image$ext4-ioctl-mount$9p_unix-syz_mount_image$tmpfs-syz_open_dev$sg-socket$netlink-fcntl$dupfd-getdents64-ioctl$AUTOFS_DEV_IOCTL_READY-sendmsg$nl_generic-getdents64-recvmsg$unix-ioctl$AUTOFS_DEV_IOCTL_EXPIRE-ioctl$VFAT_IOCTL_READDIR_SHORT-mount