Corpus for fchmodat:

Coverage	Program
3323	syz_mount_image$tmpfs-symlinkat-newfstatat-setresuid-openat$dir-mkdirat-fchmodat
2573	perf_event_open-openat-fchmodat
2124	perf_event_open-openat-close-socket$packet-socket$inet6_icmp_raw-ioctl$sock_SIOCGIFINDEX-sendto$packet-fchmodat
1637	syz_open_procfs-fchmodat
1374	syz_mount_image$tmpfs-mknodat$loop-perf_event_open-fchmodat
1075	perf_event_open-openat-fchmodat
236	prctl$PR_SET_SYSCALL_USER_DISPATCH_ON-fchmodat