Corpus for fchmod:

Coverage	Program
719	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-fchmod
277	syz_open_dev$tty1-fchmod
238	syz_init_net_socket$bt_hci-fchmod
228	perf_event_open-openat$procfs-fchmod-openat
223	close_range-socket-fchmod
171	openat$selinux_attr-fchmod
58	sysfs$2-sendmsg$IPVS_CMD_GET_DAEMON-ioctl$sock_SIOCGIFINDEX-setsockopt$inet6_IPV6_PKTINFO-fchmod-ioctl$sock_SIOCGIFINDEX-socket$netlink-openat-sendmsg$nl_generic-socket$inet6_icmp_raw-socket$inet6_icmp_raw-ioctl$sock_SIOCGIFINDEX-socket$inet6_icmp_raw-perf_event_open-ioctl$sock_SIOCGIFINDEX