Corpus for fchmodat:

Coverage	Program
5761	openat-close-openat-write-close-perf_event_open-openat-close-fchmodat-execveat
3223	syz_mount_image$tmpfs-lsetxattr$system_posix_acl-mknodat$loop-openat$dir-fchmodat-openat-openat$tcp_mem-fsetxattr$trusted_overlay_nlink-dup-perf_event_open-perf_event_open
3024	openat-close-syz_io_uring_setup-openat-write-close-openat-write$binfmt_elf32-close-fchmodat-execveat
1417	openat-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-fchmodat
231	perf_event_open-fchmodat