Corpus for fchdir:

Coverage	Program
162	openat$bsg-fchdir
158	close_range-openat$bsg-fchdir-setxattr$security_selinux-mmap$IORING_OFF_SQES
126	syz_init_net_socket$802154_dgram-perf_event_open-lseek-syz_open_dev$tty20-ioctl$VT_DISALLOCATE-ioctl$TIOCL_SCROLLCONSOLE-socketpair$unix-write$binfmt_elf64-socket$inet6_udplite-prlimit64-socket$inet6_icmp_raw-ioctl$sock_SIOCGIFINDEX-syz_open_procfs-fchdir-prlimit64
77	perf_event_open-fchdir
66	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-openat$bsg-fchdir