Corpus for fchmod:

Coverage	Program
668	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-fchmod
377	openat$ttyS3-fchmod
310	perf_event_open-syz_open_dev$tty1-fchmod
277	syz_open_dev$tty1-fchmod
260	openat$ptmx-fchmod
259	perf_event_open-pipe2-fchmod
243	perf_event_open-perf_event_open-socket$inet6_tcp-bind$inet6-io_uring_enter-perf_event_open-socket$nl_xfrm-fchmod
240	socket$packet-fchmod
225	openat$procfs-fchmod
211	close_range-pipe-fchmod
198	openat$procfs-stat-setreuid-fchmod
184	perf_event_open-fchmod
84	syz_open_procfs$namespace-fchmod