Corpus for fchmod:

Coverage	Program
4794	close_range-perf_event_open-ioctl$TIOCGPGRP-syz_open_dev$tty1-ioctl$TIOCSTI-ioctl$AUTOFS_DEV_IOCTL_CATATONIC-ioctl$AUTOFS_DEV_IOCTL_VERSION-ioctl$TIOCGWINSZ-ioctl$PIO_SCRNMAP-fcntl$setown-fcntl$getownex-ioctl$VT_WAITACTIVE-fcntl$dupfd-fchmod-timer_gettime-openat$nvram-clone3
1832	perf_event_open-socket$nl_xfrm-sendmsg$nl_xfrm-getsockopt$sock_cred-setsockopt$inet6_tcp_int-openat$sr-io_submit-socket$netlink-fchmod
1274	perf_event_open-socket$nl_xfrm-sendmsg$nl_xfrm-getsockopt$sock_cred-ioctl$sock_SIOCGPGRP-setsockopt$inet6_tcp_int-bind$inet6-io_setup-signalfd-openat-openat$sr-io_setup-io_submit-io_cancel-getsockopt$sock_cred-ioctl$PERF_EVENT_IOC_SET_OUTPUT-socket$netlink-openat$procfs-fchmod-sendmsg$nl_generic
660	openat-mmap-fchmod
277	openat$sndseq-fchmod
270	perf_event_open-perf_event_open-memfd_create-fchmod-readlinkat
227	openat$procfs-fchmod
223	close_range-socket$netlink-fchmod
171	syz_open_procfs-fchmod
169	openat$tcp_congestion-fchmod
78	openat$vcsa-fchmod
46	perf_event_open-fchmod