Corpus for openat$null:

Coverage	Program
3136	socket$netlink-perf_event_open-sendmsg$nl_generic-openat$sr-ioctl$SG_IO-openat$sr-ioctl$SG_IO-dup3-syz_genetlink_get_family_id$nl80211-openat$vcsa-sendmsg$IPVS_CMD_DEL_DEST-openat$null-ioctl$BTRFS_IOC_BALANCE_PROGRESS-ioctl$BTRFS_IOC_SCRUB_PROGRESS
2067	perf_event_open-syz_init_net_socket$bt_l2cap-perf_event_open-sendmmsg$inet6-bind$bt_l2cap-connect$bt_l2cap-openat$null-connect$bt_l2cap-mmap