Corpus for accept4$bt_l2cap:

Coverage	Program
858	perf_event_open-socket$netlink-setsockopt$netlink_NETLINK_BROADCAST_ERROR-mount$9p_fd-add_key$keyring-keyctl$setperm-keyctl$get_security-getuid-getsockopt$inet_IP_IPSEC_POLICY-socket$inet_tcp-ioctl$sock_inet_SIOCADDRT-sendmsg$nl_generic-accept4$bt_l2cap-getsockopt$inet_IP_XFRM_POLICY-syz_io_uring_submit-sendmsg$DEVLINK_CMD_PORT_SPLIT-mmap-add_key-ioctl$AUTOFS_IOC_EXPIRE_MULTI-keyctl$setperm
557	syz_open_dev$hiddev-syz_init_net_socket$bt_l2cap-accept4$bt_l2cap