// https://syzkaller.appspot.com/bug?id=b225e8b3efb5efd57dee73ca91173515090cada8
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/nl80211.h>
#include <linux/rfkill.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/usb/ch9.h>
#include <linux/veth.h>

#ifndef __NR_mmap
#define __NR_mmap 222
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
                         const void* data, int size)
{
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
                         int size)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  if (size > 0)
    memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
                            int* reply_len, bool dofail)
{
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

static int netlink_send(struct nlmsg* nlmsg, int sock)
{
  return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
                                   const char* family_name, bool dofail)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static void netlink_device_change(struct nlmsg* nlmsg, int sock,
                                  const char* name, bool up, const char* master,
                                  const void* mac, int macsize,
                                  const char* new_name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  hdr.ifi_index = if_nametoindex(name);
  netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
  if (new_name)
    netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
  if (master) {
    int ifindex = if_nametoindex(master);
    netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
  }
  if (macsize)
    netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
                            const void* addr, int addrsize)
{
  struct ifaddrmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
  hdr.ifa_scope = RT_SCOPE_UNIVERSE;
  hdr.ifa_index = if_nametoindex(dev);
  netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
  netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
  return netlink_send(nlmsg, sock);
}

static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in_addr in_addr;
  inet_pton(AF_INET, addr, &in_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
  if (err < 0) {
  }
}

static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, addr, &in6_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
  if (err < 0) {
  }
}

static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
                              const void* addr, int addrsize, const void* mac,
                              int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, NDA_DST, addr, addrsize);
  netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

static int tunfd = -1;

#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010

static void initialize_tun(void)
{
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 200;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    exit(1);
  }
  char sysctl[64];
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
  write_file(sysctl, "0");
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
  write_file(sysctl, "0");
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
  netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
  uint64_t macaddr = REMOTE_MAC;
  struct in_addr in_addr;
  inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
                    &macaddr, ETH_ALEN);
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
                    &macaddr, ETH_ALEN);
  macaddr = LOCAL_MAC;
  netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
                        NULL);
  close(sock);
}

#define WIFI_INITIAL_DEVICE_COUNT 2
#define WIFI_MAC_BASE                                                          \
  {                                                                            \
    0x08, 0x02, 0x11, 0x00, 0x00, 0x00                                         \
  }
#define WIFI_IBSS_BSSID                                                        \
  {                                                                            \
    0x50, 0x50, 0x50, 0x50, 0x50, 0x50                                         \
  }
#define WIFI_IBSS_SSID                                                         \
  {                                                                            \
    0x10, 0x10, 0x10, 0x10, 0x10, 0x10                                         \
  }
#define WIFI_DEFAULT_FREQUENCY 2412
#define WIFI_DEFAULT_SIGNAL 0
#define WIFI_DEFAULT_RX_RATE 1
#define HWSIM_CMD_REGISTER 1
#define HWSIM_CMD_FRAME 2
#define HWSIM_CMD_NEW_RADIO 4
#define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14
#define HWSIM_ATTR_PERM_ADDR 22

#define IF_OPER_UP 6
struct join_ibss_props {
  int wiphy_freq;
  bool wiphy_freq_fixed;
  uint8_t* mac;
  uint8_t* ssid;
  int ssid_len;
};

static int set_interface_state(const char* interface_name, int on)
{
  struct ifreq ifr;
  int sock = socket(AF_INET, SOCK_DGRAM, 0);
  if (sock < 0) {
    return -1;
  }
  memset(&ifr, 0, sizeof(ifr));
  strcpy(ifr.ifr_name, interface_name);
  int ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
  if (ret < 0) {
    close(sock);
    return -1;
  }
  if (on)
    ifr.ifr_flags |= IFF_UP;
  else
    ifr.ifr_flags &= ~IFF_UP;
  ret = ioctl(sock, SIOCSIFFLAGS, &ifr);
  close(sock);
  if (ret < 0) {
    return -1;
  }
  return 0;
}

static int nl80211_set_interface(struct nlmsg* nlmsg, int sock,
                                 int nl80211_family, uint32_t ifindex,
                                 uint32_t iftype)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = NL80211_CMD_SET_INTERFACE;
  netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
  netlink_attr(nlmsg, NL80211_ATTR_IFTYPE, &iftype, sizeof(iftype));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static int nl80211_join_ibss(struct nlmsg* nlmsg, int sock, int nl80211_family,
                             uint32_t ifindex, struct join_ibss_props* props)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = NL80211_CMD_JOIN_IBSS;
  netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
  netlink_attr(nlmsg, NL80211_ATTR_SSID, props->ssid, props->ssid_len);
  netlink_attr(nlmsg, NL80211_ATTR_WIPHY_FREQ, &(props->wiphy_freq),
               sizeof(props->wiphy_freq));
  if (props->mac)
    netlink_attr(nlmsg, NL80211_ATTR_MAC, props->mac, ETH_ALEN);
  if (props->wiphy_freq_fixed)
    netlink_attr(nlmsg, NL80211_ATTR_FREQ_FIXED, NULL, 0);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static int get_ifla_operstate(struct nlmsg* nlmsg, int ifindex)
{
  struct ifinfomsg info;
  memset(&info, 0, sizeof(info));
  info.ifi_family = AF_UNSPEC;
  info.ifi_index = ifindex;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1) {
    return -1;
  }
  netlink_init(nlmsg, RTM_GETLINK, 0, &info, sizeof(info));
  int n;
  int err = netlink_send_ext(nlmsg, sock, RTM_NEWLINK, &n, true);
  close(sock);
  if (err) {
    return -1;
  }
  struct rtattr* attr = IFLA_RTA(NLMSG_DATA(nlmsg->buf));
  for (; RTA_OK(attr, n); attr = RTA_NEXT(attr, n)) {
    if (attr->rta_type == IFLA_OPERSTATE)
      return *((int32_t*)RTA_DATA(attr));
  }
  return -1;
}

static int await_ifla_operstate(struct nlmsg* nlmsg, char* interface,
                                int operstate)
{
  int ifindex = if_nametoindex(interface);
  while (true) {
    usleep(1000);
    int ret = get_ifla_operstate(nlmsg, ifindex);
    if (ret < 0)
      return ret;
    if (ret == operstate)
      return 0;
  }
  return 0;
}

static int nl80211_setup_ibss_interface(struct nlmsg* nlmsg, int sock,
                                        int nl80211_family_id, char* interface,
                                        struct join_ibss_props* ibss_props)
{
  int ifindex = if_nametoindex(interface);
  if (ifindex == 0) {
    return -1;
  }
  int ret = nl80211_set_interface(nlmsg, sock, nl80211_family_id, ifindex,
                                  NL80211_IFTYPE_ADHOC);
  if (ret < 0) {
    return -1;
  }
  ret = set_interface_state(interface, 1);
  if (ret < 0) {
    return -1;
  }
  ret = nl80211_join_ibss(nlmsg, sock, nl80211_family_id, ifindex, ibss_props);
  if (ret < 0) {
    return -1;
  }
  return 0;
}

static int hwsim80211_create_device(struct nlmsg* nlmsg, int sock,
                                    int hwsim_family,
                                    uint8_t mac_addr[ETH_ALEN])
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = HWSIM_CMD_NEW_RADIO;
  netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, HWSIM_ATTR_SUPPORT_P2P_DEVICE, NULL, 0);
  netlink_attr(nlmsg, HWSIM_ATTR_PERM_ADDR, mac_addr, ETH_ALEN);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static void initialize_wifi_devices(void)
{
  int rfkill = open("/dev/rfkill", O_RDWR);
  if (rfkill == -1) {
    if (errno != ENOENT && errno != EACCES)
      exit(1);
  } else {
    struct rfkill_event event = {0};
    event.type = RFKILL_TYPE_ALL;
    event.op = RFKILL_OP_CHANGE_ALL;
    if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event)))
      exit(1);
    close(rfkill);
  }
  uint8_t mac_addr[6] = WIFI_MAC_BASE;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock < 0) {
    return;
  }
  int hwsim_family_id =
      netlink_query_family_id(&nlmsg, sock, "MAC80211_HWSIM", true);
  int nl80211_family_id =
      netlink_query_family_id(&nlmsg, sock, "nl80211", true);
  uint8_t ssid[] = WIFI_IBSS_SSID;
  uint8_t bssid[] = WIFI_IBSS_BSSID;
  struct join_ibss_props ibss_props = {.wiphy_freq = WIFI_DEFAULT_FREQUENCY,
                                       .wiphy_freq_fixed = true,
                                       .mac = bssid,
                                       .ssid = ssid,
                                       .ssid_len = sizeof(ssid)};
  for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
    mac_addr[5] = device_id;
    int ret = hwsim80211_create_device(&nlmsg, sock, hwsim_family_id, mac_addr);
    if (ret < 0)
      exit(1);
    char interface[6] = "wlan0";
    interface[4] += device_id;
    if (nl80211_setup_ibss_interface(&nlmsg, sock, nl80211_family_id, interface,
                                     &ibss_props) < 0)
      exit(1);
  }
  for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
    char interface[6] = "wlan0";
    interface[4] += device_id;
    int ret = await_ifla_operstate(&nlmsg, interface, IF_OPER_UP);
    if (ret < 0)
      exit(1);
  }
  close(sock);
}

#define MAX_FDS 30

#define USB_MAX_IFACE_NUM 4
#define USB_MAX_EP_NUM 32
#define USB_MAX_FDS 6

struct usb_endpoint_index {
  struct usb_endpoint_descriptor desc;
  int handle;
};

struct usb_iface_index {
  struct usb_interface_descriptor* iface;
  uint8_t bInterfaceNumber;
  uint8_t bAlternateSetting;
  uint8_t bInterfaceClass;
  struct usb_endpoint_index eps[USB_MAX_EP_NUM];
  int eps_num;
};

struct usb_device_index {
  struct usb_device_descriptor* dev;
  struct usb_config_descriptor* config;
  uint8_t bDeviceClass;
  uint8_t bMaxPower;
  int config_length;
  struct usb_iface_index ifaces[USB_MAX_IFACE_NUM];
  int ifaces_num;
  int iface_cur;
};

struct usb_info {
  int fd;
  struct usb_device_index index;
};

static struct usb_info usb_devices[USB_MAX_FDS];

static struct usb_device_index* lookup_usb_index(int fd)
{
  for (int i = 0; i < USB_MAX_FDS; i++) {
    if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd)
      return &usb_devices[i].index;
  }
  return NULL;
}

static int usb_devices_num;

static bool parse_usb_descriptor(const char* buffer, size_t length,
                                 struct usb_device_index* index)
{
  if (length < sizeof(*index->dev) + sizeof(*index->config))
    return false;
  memset(index, 0, sizeof(*index));
  index->dev = (struct usb_device_descriptor*)buffer;
  index->config = (struct usb_config_descriptor*)(buffer + sizeof(*index->dev));
  index->bDeviceClass = index->dev->bDeviceClass;
  index->bMaxPower = index->config->bMaxPower;
  index->config_length = length - sizeof(*index->dev);
  index->iface_cur = -1;
  size_t offset = 0;
  while (true) {
    if (offset + 1 >= length)
      break;
    uint8_t desc_length = buffer[offset];
    uint8_t desc_type = buffer[offset + 1];
    if (desc_length <= 2)
      break;
    if (offset + desc_length > length)
      break;
    if (desc_type == USB_DT_INTERFACE &&
        index->ifaces_num < USB_MAX_IFACE_NUM) {
      struct usb_interface_descriptor* iface =
          (struct usb_interface_descriptor*)(buffer + offset);
      index->ifaces[index->ifaces_num].iface = iface;
      index->ifaces[index->ifaces_num].bInterfaceNumber =
          iface->bInterfaceNumber;
      index->ifaces[index->ifaces_num].bAlternateSetting =
          iface->bAlternateSetting;
      index->ifaces[index->ifaces_num].bInterfaceClass = iface->bInterfaceClass;
      index->ifaces_num++;
    }
    if (desc_type == USB_DT_ENDPOINT && index->ifaces_num > 0) {
      struct usb_iface_index* iface = &index->ifaces[index->ifaces_num - 1];
      if (iface->eps_num < USB_MAX_EP_NUM) {
        memcpy(&iface->eps[iface->eps_num].desc, buffer + offset,
               sizeof(iface->eps[iface->eps_num].desc));
        iface->eps_num++;
      }
    }
    offset += desc_length;
  }
  return true;
}

static struct usb_device_index* add_usb_index(int fd, const char* dev,
                                              size_t dev_len)
{
  int i = __atomic_fetch_add(&usb_devices_num, 1, __ATOMIC_RELAXED);
  if (i >= USB_MAX_FDS)
    return NULL;
  if (!parse_usb_descriptor(dev, dev_len, &usb_devices[i].index))
    return NULL;
  __atomic_store_n(&usb_devices[i].fd, fd, __ATOMIC_RELEASE);
  return &usb_devices[i].index;
}

struct vusb_connect_string_descriptor {
  uint32_t len;
  char* str;
} __attribute__((packed));

struct vusb_connect_descriptors {
  uint32_t qual_len;
  char* qual;
  uint32_t bos_len;
  char* bos;
  uint32_t strs_len;
  struct vusb_connect_string_descriptor strs[0];
} __attribute__((packed));

static const char default_string[] = {8, USB_DT_STRING, 's', 0, 'y', 0, 'z', 0};

static const char default_lang_id[] = {4, USB_DT_STRING, 0x09, 0x04};

static bool
lookup_connect_response_in(int fd, const struct vusb_connect_descriptors* descs,
                           const struct usb_ctrlrequest* ctrl,
                           struct usb_qualifier_descriptor* qual,
                           char** response_data, uint32_t* response_length)
{
  struct usb_device_index* index = lookup_usb_index(fd);
  uint8_t str_idx;
  if (!index)
    return false;
  switch (ctrl->bRequestType & USB_TYPE_MASK) {
  case USB_TYPE_STANDARD:
    switch (ctrl->bRequest) {
    case USB_REQ_GET_DESCRIPTOR:
      switch (ctrl->wValue >> 8) {
      case USB_DT_DEVICE:
        *response_data = (char*)index->dev;
        *response_length = sizeof(*index->dev);
        return true;
      case USB_DT_CONFIG:
        *response_data = (char*)index->config;
        *response_length = index->config_length;
        return true;
      case USB_DT_STRING:
        str_idx = (uint8_t)ctrl->wValue;
        if (descs && str_idx < descs->strs_len) {
          *response_data = descs->strs[str_idx].str;
          *response_length = descs->strs[str_idx].len;
          return true;
        }
        if (str_idx == 0) {
          *response_data = (char*)&default_lang_id[0];
          *response_length = default_lang_id[0];
          return true;
        }
        *response_data = (char*)&default_string[0];
        *response_length = default_string[0];
        return true;
      case USB_DT_BOS:
        *response_data = descs->bos;
        *response_length = descs->bos_len;
        return true;
      case USB_DT_DEVICE_QUALIFIER:
        if (!descs->qual) {
          qual->bLength = sizeof(*qual);
          qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER;
          qual->bcdUSB = index->dev->bcdUSB;
          qual->bDeviceClass = index->dev->bDeviceClass;
          qual->bDeviceSubClass = index->dev->bDeviceSubClass;
          qual->bDeviceProtocol = index->dev->bDeviceProtocol;
          qual->bMaxPacketSize0 = index->dev->bMaxPacketSize0;
          qual->bNumConfigurations = index->dev->bNumConfigurations;
          qual->bRESERVED = 0;
          *response_data = (char*)qual;
          *response_length = sizeof(*qual);
          return true;
        }
        *response_data = descs->qual;
        *response_length = descs->qual_len;
        return true;
      default:
        break;
      }
      break;
    default:
      break;
    }
    break;
  default:
    break;
  }
  return false;
}

typedef bool (*lookup_connect_out_response_t)(
    int fd, const struct vusb_connect_descriptors* descs,
    const struct usb_ctrlrequest* ctrl, bool* done);

static bool lookup_connect_response_out_generic(
    int fd, const struct vusb_connect_descriptors* descs,
    const struct usb_ctrlrequest* ctrl, bool* done)
{
  switch (ctrl->bRequestType & USB_TYPE_MASK) {
  case USB_TYPE_STANDARD:
    switch (ctrl->bRequest) {
    case USB_REQ_SET_CONFIGURATION:
      *done = true;
      return true;
    default:
      break;
    }
    break;
  }
  return false;
}

#define UDC_NAME_LENGTH_MAX 128

struct usb_raw_init {
  __u8 driver_name[UDC_NAME_LENGTH_MAX];
  __u8 device_name[UDC_NAME_LENGTH_MAX];
  __u8 speed;
};

enum usb_raw_event_type {
  USB_RAW_EVENT_INVALID = 0,
  USB_RAW_EVENT_CONNECT = 1,
  USB_RAW_EVENT_CONTROL = 2,
};

struct usb_raw_event {
  __u32 type;
  __u32 length;
  __u8 data[0];
};

struct usb_raw_ep_io {
  __u16 ep;
  __u16 flags;
  __u32 length;
  __u8 data[0];
};

#define USB_RAW_EPS_NUM_MAX 30
#define USB_RAW_EP_NAME_MAX 16
#define USB_RAW_EP_ADDR_ANY 0xff

struct usb_raw_ep_caps {
  __u32 type_control : 1;
  __u32 type_iso : 1;
  __u32 type_bulk : 1;
  __u32 type_int : 1;
  __u32 dir_in : 1;
  __u32 dir_out : 1;
};

struct usb_raw_ep_limits {
  __u16 maxpacket_limit;
  __u16 max_streams;
  __u32 reserved;
};

struct usb_raw_ep_info {
  __u8 name[USB_RAW_EP_NAME_MAX];
  __u32 addr;
  struct usb_raw_ep_caps caps;
  struct usb_raw_ep_limits limits;
};

struct usb_raw_eps_info {
  struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX];
};

#define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init)
#define USB_RAW_IOCTL_RUN _IO('U', 1)
#define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event)
#define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor)
#define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32)
#define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_CONFIGURE _IO('U', 9)
#define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32)
#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)

static int usb_raw_open()
{
  return open("/dev/raw-gadget", O_RDWR);
}

static int usb_raw_init(int fd, uint32_t speed, const char* driver,
                        const char* device)
{
  struct usb_raw_init arg;
  strncpy((char*)&arg.driver_name[0], driver, sizeof(arg.driver_name));
  strncpy((char*)&arg.device_name[0], device, sizeof(arg.device_name));
  arg.speed = speed;
  return ioctl(fd, USB_RAW_IOCTL_INIT, &arg);
}

static int usb_raw_run(int fd)
{
  return ioctl(fd, USB_RAW_IOCTL_RUN, 0);
}

static int usb_raw_configure(int fd)
{
  return ioctl(fd, USB_RAW_IOCTL_CONFIGURE, 0);
}

static int usb_raw_vbus_draw(int fd, uint32_t power)
{
  return ioctl(fd, USB_RAW_IOCTL_VBUS_DRAW, power);
}

static int usb_raw_ep0_write(int fd, struct usb_raw_ep_io* io)
{
  return ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io);
}

static int usb_raw_ep0_read(int fd, struct usb_raw_ep_io* io)
{
  return ioctl(fd, USB_RAW_IOCTL_EP0_READ, io);
}

static int usb_raw_event_fetch(int fd, struct usb_raw_event* event)
{
  return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event);
}

static int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor* desc)
{
  return ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc);
}

static int usb_raw_ep_disable(int fd, int ep)
{
  return ioctl(fd, USB_RAW_IOCTL_EP_DISABLE, ep);
}

static int usb_raw_ep0_stall(int fd)
{
  return ioctl(fd, USB_RAW_IOCTL_EP0_STALL, 0);
}

#define USB_MAX_PACKET_SIZE 4096

struct usb_raw_control_event {
  struct usb_raw_event inner;
  struct usb_ctrlrequest ctrl;
  char data[USB_MAX_PACKET_SIZE];
};

struct usb_raw_ep_io_data {
  struct usb_raw_ep_io inner;
  char data[USB_MAX_PACKET_SIZE];
};

static void set_interface(int fd, int n)
{
  struct usb_device_index* index = lookup_usb_index(fd);
  if (!index)
    return;
  if (index->iface_cur >= 0 && index->iface_cur < index->ifaces_num) {
    for (int ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++) {
      int rv = usb_raw_ep_disable(
          fd, index->ifaces[index->iface_cur].eps[ep].handle);
      if (rv < 0) {
      } else {
      }
    }
  }
  if (n >= 0 && n < index->ifaces_num) {
    for (int ep = 0; ep < index->ifaces[n].eps_num; ep++) {
      int rv = usb_raw_ep_enable(fd, &index->ifaces[n].eps[ep].desc);
      if (rv < 0) {
      } else {
        index->ifaces[n].eps[ep].handle = rv;
      }
    }
    index->iface_cur = n;
  }
}

static int configure_device(int fd)
{
  struct usb_device_index* index = lookup_usb_index(fd);
  if (!index)
    return -1;
  int rv = usb_raw_vbus_draw(fd, index->bMaxPower);
  if (rv < 0) {
    return rv;
  }
  rv = usb_raw_configure(fd);
  if (rv < 0) {
    return rv;
  }
  set_interface(fd, 0);
  return 0;
}

static volatile long
syz_usb_connect_impl(uint64_t speed, uint64_t dev_len, const char* dev,
                     const struct vusb_connect_descriptors* descs,
                     lookup_connect_out_response_t lookup_connect_response_out)
{
  if (!dev) {
    return -1;
  }
  int fd = usb_raw_open();
  if (fd < 0) {
    return fd;
  }
  if (fd >= MAX_FDS) {
    close(fd);
    return -1;
  }
  struct usb_device_index* index = add_usb_index(fd, dev, dev_len);
  if (!index) {
    return -1;
  }
  char device[32];
  sprintf(&device[0], "dummy_udc.%llu", procid);
  int rv = usb_raw_init(fd, speed, "dummy_udc", &device[0]);
  if (rv < 0) {
    return rv;
  }
  rv = usb_raw_run(fd);
  if (rv < 0) {
    return rv;
  }
  bool done = false;
  while (!done) {
    struct usb_raw_control_event event;
    event.inner.type = 0;
    event.inner.length = sizeof(event.ctrl);
    rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
    if (rv < 0) {
      return rv;
    }
    if (event.inner.type != USB_RAW_EVENT_CONTROL)
      continue;
    char* response_data = NULL;
    uint32_t response_length = 0;
    struct usb_qualifier_descriptor qual;
    if (event.ctrl.bRequestType & USB_DIR_IN) {
      if (!lookup_connect_response_in(fd, descs, &event.ctrl, &qual,
                                      &response_data, &response_length)) {
        usb_raw_ep0_stall(fd);
        continue;
      }
    } else {
      if (!lookup_connect_response_out(fd, descs, &event.ctrl, &done)) {
        usb_raw_ep0_stall(fd);
        continue;
      }
      response_data = NULL;
      response_length = event.ctrl.wLength;
    }
    if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        event.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
      rv = configure_device(fd);
      if (rv < 0) {
        return rv;
      }
    }
    struct usb_raw_ep_io_data response;
    response.inner.ep = 0;
    response.inner.flags = 0;
    if (response_length > sizeof(response.data))
      response_length = 0;
    if (event.ctrl.wLength < response_length)
      response_length = event.ctrl.wLength;
    response.inner.length = response_length;
    if (response_data)
      memcpy(&response.data[0], response_data, response_length);
    else
      memset(&response.data[0], 0, response_length);
    if (event.ctrl.bRequestType & USB_DIR_IN) {
      rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response);
    } else {
      rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response);
    }
    if (rv < 0) {
      return rv;
    }
  }
  sleep_ms(200);
  return fd;
}

static volatile long syz_usb_connect(volatile long a0, volatile long a1,
                                     volatile long a2, volatile long a3)
{
  uint64_t speed = a0;
  uint64_t dev_len = a1;
  const char* dev = (const char*)a2;
  const struct vusb_connect_descriptors* descs =
      (const struct vusb_connect_descriptors*)a3;
  return syz_usb_connect_impl(speed, dev_len, dev, descs,
                              &lookup_connect_response_out_generic);
}

#define BTPROTO_HCI 1
#define ACL_LINK 1
#define SCAN_PAGE 2

typedef struct {
  uint8_t b[6];
} __attribute__((packed)) bdaddr_t;

#define HCI_COMMAND_PKT 1
#define HCI_EVENT_PKT 4
#define HCI_VENDOR_PKT 0xff

struct hci_command_hdr {
  uint16_t opcode;
  uint8_t plen;
} __attribute__((packed));

struct hci_event_hdr {
  uint8_t evt;
  uint8_t plen;
} __attribute__((packed));

#define HCI_EV_CONN_COMPLETE 0x03
struct hci_ev_conn_complete {
  uint8_t status;
  uint16_t handle;
  bdaddr_t bdaddr;
  uint8_t link_type;
  uint8_t encr_mode;
} __attribute__((packed));

#define HCI_EV_CONN_REQUEST 0x04
struct hci_ev_conn_request {
  bdaddr_t bdaddr;
  uint8_t dev_class[3];
  uint8_t link_type;
} __attribute__((packed));

#define HCI_EV_REMOTE_FEATURES 0x0b
struct hci_ev_remote_features {
  uint8_t status;
  uint16_t handle;
  uint8_t features[8];
} __attribute__((packed));

#define HCI_EV_CMD_COMPLETE 0x0e
struct hci_ev_cmd_complete {
  uint8_t ncmd;
  uint16_t opcode;
} __attribute__((packed));

#define HCI_OP_WRITE_SCAN_ENABLE 0x0c1a

#define HCI_OP_READ_BUFFER_SIZE 0x1005
struct hci_rp_read_buffer_size {
  uint8_t status;
  uint16_t acl_mtu;
  uint8_t sco_mtu;
  uint16_t acl_max_pkt;
  uint16_t sco_max_pkt;
} __attribute__((packed));

#define HCI_OP_READ_BD_ADDR 0x1009
struct hci_rp_read_bd_addr {
  uint8_t status;
  bdaddr_t bdaddr;
} __attribute__((packed));

#define HCI_EV_LE_META 0x3e
struct hci_ev_le_meta {
  uint8_t subevent;
} __attribute__((packed));

#define HCI_EV_LE_CONN_COMPLETE 0x01
struct hci_ev_le_conn_complete {
  uint8_t status;
  uint16_t handle;
  uint8_t role;
  uint8_t bdaddr_type;
  bdaddr_t bdaddr;
  uint16_t interval;
  uint16_t latency;
  uint16_t supervision_timeout;
  uint8_t clk_accurancy;
} __attribute__((packed));

struct hci_dev_req {
  uint16_t dev_id;
  uint32_t dev_opt;
};

struct vhci_vendor_pkt_request {
  uint8_t type;
  uint8_t opcode;
} __attribute__((packed));

struct vhci_pkt {
  uint8_t type;
  union {
    struct {
      uint8_t opcode;
      uint16_t id;
    } __attribute__((packed)) vendor_pkt;
    struct hci_command_hdr command_hdr;
  };
} __attribute__((packed));

#define HCIDEVUP _IOW('H', 201, int)
#define HCISETSCAN _IOW('H', 221, int)

static int vhci_fd = -1;

static void rfkill_unblock_all()
{
  int fd = open("/dev/rfkill", O_WRONLY);
  if (fd < 0)
    exit(1);
  struct rfkill_event event = {0};
  event.idx = 0;
  event.type = RFKILL_TYPE_ALL;
  event.op = RFKILL_OP_CHANGE_ALL;
  event.soft = 0;
  event.hard = 0;
  if (write(fd, &event, sizeof(event)) < 0)
    exit(1);
  close(fd);
}

static void hci_send_event_packet(int fd, uint8_t evt, void* data,
                                  size_t data_len)
{
  struct iovec iv[3];
  struct hci_event_hdr hdr;
  hdr.evt = evt;
  hdr.plen = data_len;
  uint8_t type = HCI_EVENT_PKT;
  iv[0].iov_base = &type;
  iv[0].iov_len = sizeof(type);
  iv[1].iov_base = &hdr;
  iv[1].iov_len = sizeof(hdr);
  iv[2].iov_base = data;
  iv[2].iov_len = data_len;
  if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
    exit(1);
}

static void hci_send_event_cmd_complete(int fd, uint16_t opcode, void* data,
                                        size_t data_len)
{
  struct iovec iv[4];
  struct hci_event_hdr hdr;
  hdr.evt = HCI_EV_CMD_COMPLETE;
  hdr.plen = sizeof(struct hci_ev_cmd_complete) + data_len;
  struct hci_ev_cmd_complete evt_hdr;
  evt_hdr.ncmd = 1;
  evt_hdr.opcode = opcode;
  uint8_t type = HCI_EVENT_PKT;
  iv[0].iov_base = &type;
  iv[0].iov_len = sizeof(type);
  iv[1].iov_base = &hdr;
  iv[1].iov_len = sizeof(hdr);
  iv[2].iov_base = &evt_hdr;
  iv[2].iov_len = sizeof(evt_hdr);
  iv[3].iov_base = data;
  iv[3].iov_len = data_len;
  if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
    exit(1);
}

static bool process_command_pkt(int fd, char* buf, ssize_t buf_size)
{
  struct hci_command_hdr* hdr = (struct hci_command_hdr*)buf;
  if (buf_size < (ssize_t)sizeof(struct hci_command_hdr) ||
      hdr->plen != buf_size - sizeof(struct hci_command_hdr))
    exit(1);
  switch (hdr->opcode) {
  case HCI_OP_WRITE_SCAN_ENABLE: {
    uint8_t status = 0;
    hci_send_event_cmd_complete(fd, hdr->opcode, &status, sizeof(status));
    return true;
  }
  case HCI_OP_READ_BD_ADDR: {
    struct hci_rp_read_bd_addr rp = {0};
    rp.status = 0;
    memset(&rp.bdaddr, 0xaa, 6);
    hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
    return false;
  }
  case HCI_OP_READ_BUFFER_SIZE: {
    struct hci_rp_read_buffer_size rp = {0};
    rp.status = 0;
    rp.acl_mtu = 1021;
    rp.sco_mtu = 96;
    rp.acl_max_pkt = 4;
    rp.sco_max_pkt = 6;
    hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
    return false;
  }
  }
  char dummy[0xf9] = {0};
  hci_send_event_cmd_complete(fd, hdr->opcode, dummy, sizeof(dummy));
  return false;
}

static void* event_thread(void* arg)
{
  while (1) {
    char buf[1024] = {0};
    ssize_t buf_size = read(vhci_fd, buf, sizeof(buf));
    if (buf_size < 0)
      exit(1);
    if (buf_size > 0 && buf[0] == HCI_COMMAND_PKT) {
      if (process_command_pkt(vhci_fd, buf + 1, buf_size - 1))
        break;
    }
  }
  return NULL;
}
#define HCI_HANDLE_1 200
#define HCI_HANDLE_2 201

#define HCI_PRIMARY 0
#define HCI_OP_RESET 0x0c03

static void initialize_vhci()
{
  int hci_sock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
  if (hci_sock < 0)
    exit(1);
  vhci_fd = open("/dev/vhci", O_RDWR);
  if (vhci_fd == -1)
    exit(1);
  const int kVhciFd = 202;
  if (dup2(vhci_fd, kVhciFd) < 0)
    exit(1);
  close(vhci_fd);
  vhci_fd = kVhciFd;
  struct vhci_vendor_pkt_request vendor_pkt_req = {HCI_VENDOR_PKT, HCI_PRIMARY};
  if (write(vhci_fd, &vendor_pkt_req, sizeof(vendor_pkt_req)) !=
      sizeof(vendor_pkt_req))
    exit(1);
  struct vhci_pkt vhci_pkt;
  if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
    exit(1);
  if (vhci_pkt.type == HCI_COMMAND_PKT &&
      vhci_pkt.command_hdr.opcode == HCI_OP_RESET) {
    char response[1] = {0};
    hci_send_event_cmd_complete(vhci_fd, HCI_OP_RESET, response,
                                sizeof(response));
    if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
      exit(1);
  }
  if (vhci_pkt.type != HCI_VENDOR_PKT)
    exit(1);
  int dev_id = vhci_pkt.vendor_pkt.id;
  pthread_t th;
  if (pthread_create(&th, NULL, event_thread, NULL))
    exit(1);
  int ret = ioctl(hci_sock, HCIDEVUP, dev_id);
  if (ret) {
    if (errno == ERFKILL) {
      rfkill_unblock_all();
      ret = ioctl(hci_sock, HCIDEVUP, dev_id);
    }
    if (ret && errno != EALREADY)
      exit(1);
  }
  struct hci_dev_req dr = {0};
  dr.dev_id = dev_id;
  dr.dev_opt = SCAN_PAGE;
  if (ioctl(hci_sock, HCISETSCAN, &dr))
    exit(1);
  struct hci_ev_conn_request request;
  memset(&request, 0, sizeof(request));
  memset(&request.bdaddr, 0xaa, 6);
  *(uint8_t*)&request.bdaddr.b[5] = 0x10;
  request.link_type = ACL_LINK;
  hci_send_event_packet(vhci_fd, HCI_EV_CONN_REQUEST, &request,
                        sizeof(request));
  struct hci_ev_conn_complete complete;
  memset(&complete, 0, sizeof(complete));
  complete.status = 0;
  complete.handle = HCI_HANDLE_1;
  memset(&complete.bdaddr, 0xaa, 6);
  *(uint8_t*)&complete.bdaddr.b[5] = 0x10;
  complete.link_type = ACL_LINK;
  complete.encr_mode = 0;
  hci_send_event_packet(vhci_fd, HCI_EV_CONN_COMPLETE, &complete,
                        sizeof(complete));
  struct hci_ev_remote_features features;
  memset(&features, 0, sizeof(features));
  features.status = 0;
  features.handle = HCI_HANDLE_1;
  hci_send_event_packet(vhci_fd, HCI_EV_REMOTE_FEATURES, &features,
                        sizeof(features));
  struct {
    struct hci_ev_le_meta le_meta;
    struct hci_ev_le_conn_complete le_conn;
  } le_conn;
  memset(&le_conn, 0, sizeof(le_conn));
  le_conn.le_meta.subevent = HCI_EV_LE_CONN_COMPLETE;
  memset(&le_conn.le_conn.bdaddr, 0xaa, 6);
  *(uint8_t*)&le_conn.le_conn.bdaddr.b[5] = 0x11;
  le_conn.le_conn.role = 1;
  le_conn.le_conn.handle = HCI_HANDLE_2;
  hci_send_event_packet(vhci_fd, HCI_EV_LE_META, &le_conn, sizeof(le_conn));
  pthread_join(th, NULL);
  close(hci_sock);
}

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  initialize_vhci();
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  initialize_tun();
  initialize_wifi_devices();
  setup_binderfs();
  loop();
  exit(1);
}

static void close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static void setup_sysctl()
{
  char mypid[32];
  snprintf(mypid, sizeof(mypid), "%d", getpid());
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", mypid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data))
      printf("write to %s failed: %s\n", files[i].name, strerror(errno));
  }
}

void loop(void)
{
  NONFAILING(memcpy(
      (void*)0x20001040,
      "\x12\x01\x00\x00\x00\xfd\xc2\x08\x40\x20\x01\x18\xc8\x6e\x01\x02\x03\x01"
      "\x09\x02\xcd\x0b\x03\xfd\x00\x00\x00\x09\x04\x37\x80\x0a\x50\xa9\x17\x20"
      "\x09\x05\x02\x00\xff\x03\x7f\xfc\xb7\x09\x05\x06\x62\x00\x04\x80\x04\x70"
      "\x07\x25\x01\x83\x07\x03\x00\xef\x0c\xe7\xa4\x17\x40\x42\xf2\xad\xf5\x54"
      "\x2c\xeb\x32\x5a\xfd\x69\x78\x98\x74\x62\x34\x01\xe8\x41\xfb\xdd\xf0\x0f"
      "\x00\x35\x9a\xd2\xf6\xe1\x20\x4a\x37\x42\xa9\x56\xb5\x03\x98\x9b\x15\xb5"
      "\x4b\x96\x7d\xb6\x3a\xbe\xda\x46\x6d\xf3\x40\xc2\xa9\xe4\xcd\x15\xba\x74"
      "\xfc\x9c\x59\xcd\x45\xe3\x99\x8b\x80\x75\x81\x76\xde\x64\x7f\x0e\x7a\x88"
      "\x75\xf1\x7a\x9f\x87\xe7\x73\x2e\x0b\xb6\x01\x5b\x52\x1c\x42\x51\x94\x1c"
      "\xba\x69\x80\x70\xc4\x4d\x0c\xcd\xac\x1d\x12\x33\x0b\xf2\x64\x88\x32\xf5"
      "\x6e\xf3\x29\xf4\x9e\xb2\x5c\x37\x1d\x21\xa5\x5c\x33\x02\xd5\xe0\x2c\x0a"
      "\xe9\x73\x26\x43\xe4\x33\x17\x39\x9c\x49\xac\x5d\xa6\xdf\x77\x64\x24\x5c"
      "\x11\x3f\x5b\x5f\x73\x11\x0c\xba\x5d\x42\x2c\x99\x2f\xb4\x88\xa7\x53\x49"
      "\xc1\x0f\xd8\xa7\x3a\x70\x90\xd0\x16\xb6\x79\x4f\x86\x35\x94\x1a\x1e\xac"
      "\x2e\x9f\x5b\x66\xd5\xd8\xb0\x4d\x0d\xee\x85\x4c\x7a\xe9\xc6\x4a\x16\x67"
      "\x65\x39\x7d\x42\x1d\x42\x85\x5f\xb0\x17\xef\x53\x3c\x68\xd3\x14\xda\xcd"
      "\x4a\x2c\x35\x7f\x06\x2f\x1e\x77\x28\x8c\xdf\x2b\x09\x05\x00\x00\x00\x02"
      "\x04\xff\x40\x07\x25\x01\x41\x08\x01\x00\x09\x05\x02\x00\x00\x02\x02\x02"
      "\x7f\xa2\x04\x93\xd7\x06\xad\x6d\x94\x8f\xb2\x87\x2f\x47\xa1\xaf\x8c\x0a"
      "\xb4\x2b\x53\x61\xa7\xe2\xcd\x8a\x96\x25\x2a\xd4\xfb\xd9\x3a\x90\xba\xe0"
      "\x45\xdc\xd3\xc9\xd2\x7a\x67\x4f\x2b\x85\x83\xfa\x2b\xb8\x54\x05\x88\xa0"
      "\x7d\xe3\x5e\x39\xe1\xdc\x9e\xfa\xb9\xd2\x8e\x84\xea\xd6\xe6\x89\xa6\x33"
      "\x0e\xb1\xfa\xd7\xaa\xbf\x9b\x5b\xa2\xb8\xdb\xae\x6c\x94\xb0\xfa\xbd\x9f"
      "\x69\x6f\xc7\x31\x34\xb6\xc6\x12\x99\x86\x6e\x79\x8e\xd1\x8b\x99\xad\x0e"
      "\x06\xd5\xb4\xaf\x5f\x57\x53\x45\x52\x3b\xd7\x9d\x27\x75\xba\x01\x9a\xde"
      "\x26\xf5\x70\x0b\xfd\x5f\x2d\x2a\x23\xc4\x61\xc2\x80\xe7\xa3\xdf\xba\x19"
      "\xb6\xef\x06\xc7\xe9\x85\x40\x56\x33\x8d\x2d\x11\x50\xdf\x42\x83\xab\x1d"
      "\x06\xc5\x21\x1a\xb8\x88\x4f\xd6\xe0\xd3\x17\x36\xae\x7c\x55\x07\x16\xfc"
      "\x6f\xda\x5e\x63\x2c\xa3\x84\x4b\x37\x8a\x96\xd8\x3e\xe6\x0e\xa9\xab\xcf"
      "\x3e\x21\x3f\xeb\x68\x82\x06\x79\xaa\xb6\x77\x60\xdd\x84\xcb\x95\x2d\x30"
      "\x76\x78\xf6\xa2\x2b\xab\x2c\xd9\x8a\xe7\x15\x69\x08\x37\xbc\x98\xd3\xe2"
      "\x08\x64\x7f\x4c\x18\x85\x2d\x79\x1d\x64\xe4\x5c\x6a\x4f\xe4\x5d\x8f\xc4"
      "\xe5\x56\x24\x4b\x68\xcf\x24\x36\x7f\xa2\x07\x81\xa7\xa5\x16\xa0\x77\xc2"
      "\xc4\xe3\x68\x09\xe0\xdf\x62\x95\xad\x17\xeb\xb8\xf0\xcf\xfc\x62\x20\xa7"
      "\x8d\x92\x14\x28\x88\x00\x9d\xc3\x48\x5e\x0e\x3c\x78\xfc\xdb\x22\xcc\xe2"
      "\xca\x08\x15\x39\x46\x0c\xa6\xce\x31\x6e\x61\xab\xba\x8c\x38\x19\xf9\x14"
      "\x84\x78\x59\x55\x34\x77\xad\xd4\xf2\xde\x16\xa9\x33\x8a\x01\x23\x6c\x6e"
      "\xd3\x46\x18\x69\xa1\x86\x52\x66\x2e\xe2\x15\x26\xd9\x21\x1f\x78\xea\x4f"
      "\x09\x05\x03\x0c\x08\x00\x20\x06\x7f\x09\x05\x03\x00\xff\x03\x04\xf8\x09"
      "\x97\x07\xa6\xd1\x24\x21\xa2\xc7\x80\xb5\x3d\x90\xe0\xa8\xb0\x37\xe1\x6b"
      "\x48\xf1\x48\x4c\x37\xc9\xfd\x8f\x3b\xa1\xff\x80\xea\xaf\xd4\x2f\xd2\x78"
      "\x40\x45\xf8\x47\xef\x75\x10\x3f\xbf\xfe\xb0\x1b\x7f\x5d\x39\x92\x63\x19"
      "\xbd\xd6\x5b\xd9\x51\xa5\x2d\x26\x2e\x01\x61\x71\x54\xb6\x6f\x74\xdd\xd3"
      "\xf5\x5f\x3d\x15\xe6\x70\x9e\xb0\x6b\xe5\xf7\x65\x86\x1a\x56\xe7\xb6\xe2"
      "\xa5\xd5\x48\x2b\xeb\x5e\x6e\x6b\xf6\x73\xca\x29\x06\xb1\x78\xba\x3a\x08"
      "\x87\x26\xd3\xed\x67\x2f\xa5\xe7\x14\x9b\xee\xbe\x97\x41\x5a\x2c\x0f\xc0"
      "\xc7\x26\x68\x46\xcd\xac\xf5\x08\x88\xdc\x92\xec\x4f\x1b\x69\xc7\x7c\x92"
      "\x9e\x29\xf6\x91\x96\xfb\xac\x3f\x0b\x43\x38\x0b\x13\x79\xc2\x71\x50\x65"
      "\x36\x3f\xd6\x23\x7d\x20\x97\xff\xe8\x4c\x63\xa9\xaf\x5c\xad\xb2\xda\x02"
      "\x2c\xde\x49\x1c\xb2\xe9\xb0\x53\x2f\xc3\x90\x03\xad\x5f\xc2\x6d\x65\x79"
      "\xe5\xd8\xf7\x37\xe4\x09\xeb\x73\xbc\x31\x46\x55\x87\x48\xdc\x69\x09\x05"
      "\x08\x01\x00\x02\x02\x00\x00\x07\x25\x01\xc1\x0f\xf7\xff\x09\x05\x0b\x00"
      "\x00\x00\x03\x05\x01\x09\x05\x0f\x10\x00\x04\x02\x00\x78\x09\x05\x02\x00"
      "\x10\x00\xf8\x3f\xc0\xac\x0b\xd5\xb5\x02\xe5\x58\x9c\x1f\x68\xc9\xe5\xc3"
      "\x16\xc7\x1a\xb3\xab\x9c\xb5\x74\xf6\xa5\x73\x56\xb2\xa5\xc7\xd5\xc4\xe3"
      "\xb1\x70\x47\x4a\x4c\xe5\x29\xe1\xb6\xeb\x46\xde\x5d\xcc\x67\x58\xc0\x3a"
      "\x36\x16\x4f\xd4\x52\x95\x89\xbe\xcf\x5f\x63\x87\x83\xa7\xde\x2b\x21\x26"
      "\xe7\xc5\x60\xd1\x33\x12\x3c\x61\x7a\x2f\x56\xd7\x88\x1a\x70\x89\x61\x28"
      "\x5b\xb5\x74\xc9\x44\x88\xa5\x62\x57\x6a\x24\xa5\xd6\x6c\x98\xe2\x50\x51"
      "\xb1\xc3\x11\x04\xe4\x76\x95\xc7\xc7\x4f\xfc\x44\xc6\xdb\x23\x44\xe8\x56"
      "\xbf\x56\x07\x97\xf3\xf7\x14\x83\x27\x6f\xf5\x3a\xc4\x64\x08\xb7\x99\xf2"
      "\xb0\x34\x90\xce\x1b\x86\xa2\x7b\x2a\xe4\xbd\xac\x07\xa2\x7d\x79\x7a\x3f"
      "\x4d\x64\xee\x53\x38\xec\x11\x3d\xea\x5a\xd6\x9c\xfd\x90\xb5\xfa\x0e\x61"
      "\x60\xc3\xd3\x2e\xbd\x19\x2b\xc1\x97\xc4\xb5\xc8\x22\xef\xee\x54\xd5\xd4"
      "\x00\x8e\xc8\x34\x67\xcb\x9d\x92\x39\x15\xab\x32\xbe\xa6\x86\x87\x23\xa5"
      "\xa0\x04\x39\x19\x81\xf9\x28\x77\xaa\x5d\x23\x17\x77\x21\x3d\x0f\xd2\x17"
      "\x4f\x95\x4d\xf9\xf6\x63\x17\x4c\xcf\x3d\x2d\x26\xc0\xbb\x39\xef\x31\x31"
      "\x0f\x72\xa2\xfe\x49\x15\x72\x55\x47\x32\x93\xbd\xb9\x83\xfe\x72\x7e\xd8"
      "\x07\xe0\x89\x54\x57\x5d\xa7\xfb\xf9\x14\xe2\x2c\xad\x4d\xcc\xf6\xa7\x7c"
      "\x49\x59\xb3\xa1\x2d\xe7\x74\x70\xb8\xd2\x4c\x54\x68\xd8\x0b\x39\x70\xe4"
      "\x0d\x95\x43\x37\x1d\x2f\xe7\x21\x01\x2a\xaf\x32\x60\xd5\x73\x7c\x22\xf5"
      "\xa2\x84\x03\xeb\x6a\x8a\xeb\x9c\xa0\x7d\xbb\x63\xa4\x7b\x7c\x1c\x3d\x0d"
      "\xa5\x25\xf0\x53\x0a\xae\xb9\x57\xfa\xf4\x89\x43\xd0\x79\x91\xfd\x3b\xc7"
      "\x30\x73\x6a\xbb\x88\x31\x8b\x43\x1d\xc0\xbc\x3e\x07\x81\xb7\x4b\x44\x0b"
      "\xa1\x69\xbc\x68\xad\xb3\x19\x4d\x9c\x2f\xac\x8d\x0e\xbf\x1a\xca\xf5\x50"
      "\x3c\x3d\x3c\x9c\x71\x33\xfc\x38\xe9\xeb\xca\x83\xa8\x22\x15\x79\x0b\xb1"
      "\x67\xfb\x28\x2f\x7b\x3c\xa1\xac\x43\x23\xb4\x2f\xd6\x09\x04\x00\x01\x09"
      "\xdf\xee\x3d\x00\x09\x05\x04\x10\x20\x00\x3f\xbd\x44\x07\x25\x01\x01\x05"
      "\x24\x00\x25\x30\x74\x71\x77\x33\x80\x29\xd5\xb2\x3d\x45\xad\x2b\x6b\xa5"
      "\x7f\xdf\xea\x67\xbb\x34\x89\x71\x48\xc2\x09\x9e\x70\x30\x4b\x45\x39\x83"
      "\x02\xe7\xb4\x09\x05\x04\x08\x00\x02\x02\xd3\x40\x64\x05\xf0\x80\x24\xf4"
      "\xdb\xeb\xb7\x56\x68\xc9\x1f\x0b\xf8\xe4\x66\xc5\xc4\x7b\xe7\x63\x9e\x74"
      "\x38\x9f\x6d\x01\x64\x09\x38\x59\x7d\x61\x75\xd9\x2d\x0d\xef\xd5\x17\x21"
      "\x76\xd3\x0b\xa6\x90\x3f\xb8\xc7\x1f\x04\x53\xed\x6c\xf8\x48\x2e\x9e\x39"
      "\xa1\xd3\x8d\x6a\xa6\xe5\x20\xbd\x6d\xfd\x2a\xa2\xd8\x09\xc1\x7c\xa2\xe3"
      "\xc9\x69\x21\xef\xc4\x35\x4c\xdd\x1e\x7d\x52\x79\xf7\x1a\x69\x5d\xc2\x58"
      "\xf9\x5d\x09\x1c\xee\x24\xcb\xd7\x85\x8a\x58\xd7\xf2\x16\x76\x88\xac\x59"
      "\x91\x2e\x91\xe7\x2d\xa0\x00\x53\xc8\xd7\xef\x8f\xd7\xf7\x6f\xec\x5c\xea"
      "\xb9\x41\x7d\x41\x2a\xba\x9b\x8b\xd0\xdb\xb9\xfd\x2d\x02\x14\x62\xf1\x74"
      "\xe4\x12\xfa\xd5\x71\x82\x47\x59\x46\xa8\xb8\xc5\x0c\x91\xa3\x40\x28\xf0"
      "\x8d\x8b\xba\x94\x62\xc6\xc4\xbb\x2c\x14\xdd\x47\xce\x6a\xfb\x59\xb0\xbc"
      "\xe2\xae\x2b\xa6\xaa\x57\xf6\x50\x79\xe6\x6f\x1c\x75\x10\x28\x26\x8b\x36"
      "\x75\x11\x73\x6b\x44\x96\x66\x17\xa4\xa0\x30\xdd\x24\x78\xc5\x1e\x96\x09"
      "\x2c\x38\x64\xb3\x10\xd7\x15\x3c\xfc\x5f\x2e\x3c\x97\x75\xfe\x21\xeb\xc1"
      "\x57\xd0\x9d\xcf\xc2\x1a\xf1\xb6\x35\x92\x02\xce\xfe\x7a\x20\xe1\x76\x34"
      "\x59\x86\x29\xd9\x27\xd0\xe6\x3f\x17\x5d\x52\xb0\x3b\x5e\xe3\x0c\x1c\xc6"
      "\xc9\x0a\xc8\x69\x21\x6a\x39\xad\xf8\x58\x38\xa0\xe6\x9c\xe6\xb6\x77\x75"
      "\xe2\xed\x5d\x8f\xb6\x24\x5c\x6e\xee\x0f\x3a\x9c\x22\xe4\x18\x1d\x50\x54"
      "\xff\x44\xe0\xe5\xae\x93\x74\x0b\xc0\xb9\x4c\xb1\x07\xa9\x73\x11\xb7\x9b"
      "\xff\xea\x1d\x3d\xec\x54\x1f\x2b\x09\x05\x0e\x00\x00\x04\x07\x05\x04\xc0"
      "\x0a\xe9\xd4\x2d\xdd\xa6\xfb\x16\x14\x1a\x5f\x1d\x2b\x4b\x60\xbc\x92\xd0"
      "\x59\xa6\xda\x1b\x02\x10\x55\x18\x52\x66\xf4\x96\x8e\xc6\xea\x48\x18\xde"
      "\x9a\xd3\xc8\x23\x53\x50\xa0\x2e\x10\x55\x46\xf7\x0e\x5a\x6e\x11\xdd\xef"
      "\xcb\xcd\x3e\x17\x43\x0b\x3c\x51\x20\x08\xc8\x5b\x40\xa6\xe9\x78\xeb\x03"
      "\x3b\xa1\xd0\x98\xfd\xb6\x40\x37\x5a\xbf\xc2\x11\x11\xb1\x3d\x4b\x42\xf3"
      "\x13\xb3\x03\x6a\xd1\x90\xb2\x7e\x99\xb3\xe9\x6e\xe8\xb3\x91\xc6\x78\x8f"
      "\x2b\x10\x14\xe2\x5b\x17\xad\xa5\xce\x41\x11\x65\x87\x35\x79\x63\x4d\x5d"
      "\x35\x05\xf2\x56\x97\x3b\xd3\x85\x60\x51\x3a\x18\x77\xe3\xde\x9b\x5b\xf9"
      "\x64\xd2\xdc\x59\xe0\xba\x10\xd1\x4d\xcd\xf7\xa1\x0c\xa7\xfa\xbc\xf1\x55"
      "\xa2\x00\xdb\xa7\x03\x63\xec\x07\x2e\x84\x3e\x52\xda\x6a\x2d\x42\x4c\x69"
      "\x88\x84\xe6\x20\x1f\xe9\x9e\x2b\x71\x60\xdd\xc8\x05\x88\x65\x14\x5d\x24"
      "\xf5\xc0\x3f\x57\x22\x1d\xf6\xbd\xf2\x5a\xce\xf9\xe9\x2f\x75\xc0\x44\xe4"
      "\xeb\xe7\xc7\xef\x6a\x41\x31\xc8\x40\xd6\x82\x35\x51\x5b\x2e\x4a\xfa\xc6"
      "\xb2\x23\x3f\x5b\x2b\xbf\x2a\x9f\xa9\x87\xf4\x5a\xbc\xb7\x67\x55\xa0\xea"
      "\x10\x98\xbd\x31\xc4\x70\x10\x46\xdf\xce\xf1\x19\x94\xd4\x1d\x23\xed\x27"
      "\x1b\x49\x9f\x43\x45\xb3\x54\x00\xf0\xb8\xb5\x06\xa2\xb2\x8e\xc6\xa4\x04"
      "\xbe\xda\x19\x17\x94\xf5\x4a\xbe\x00\xb0\xb6\xaf\x7e\x64\xbb\xb9\x51\x1a"
      "\x9d\x4a\x6b\x0a\x8b\xd3\xae\x40\x54\x18\x76\x6c\x18\xc1\x12\x1d\x39\x8f"
      "\xab\x0e\xe3\xc1\xdc\x78\xe0\xba\x71\xb7\x2e\x96\xd2\x7d\x31\xcc\x89\xfe"
      "\x39\xfd\x09\x09\x0e\x49\x4e\x99\x08\x80\x9e\x9a\x35\xfb\x34\x90\xf4\x2d"
      "\x25\x6c\x1b\x82\x59\x53\xb1\x16\x71\xfc\x15\x83\x3b\x5d\xa2\x26\xe6\x86"
      "\x64\xa2\x71\xf4\x4e\x87\x06\x1e\xf7\x2b\x75\xa2\x54\x09\x05\x00\x0c\x08"
      "\x00\xc0\x04\x83\x1d\x22\x6b\x20\x3d\x69\x7b\x90\xa7\x5f\x62\x62\xca\xa0"
      "\x88\xc3\x4c\x79\xa2\xed\x38\xf7\xf7\x35\x25\x9b\x8b\x9f\x9c\x5b\x21\x30"
      "\x58\x28\x2e\x4e\xda\x2b\x52\x41\x25\x21\x97\x16\x9f\x68\x8e\x27\x7f\x13"
      "\x08\x9c\x90\x2b\x23\x03\x45\x1a\x9f\xa6\xa0\x15\xd5\x5c\x9d\x4b\x40\x1a"
      "\xc4\x50\xb5\x33\x73\xab\x7b\x78\xfc\x12\x5b\x11\x56\x20\xfc\xd7\x48\x1a"
      "\x46\x1e\x7a\xfc\x59\xfe\xa7\xf7\xce\xe7\x54\x28\x64\x30\x23\xf1\x5d\x75"
      "\xba\xcb\xb7\x62\x33\xdb\x02\xeb\xf5\x4d\x5d\xc7\x12\xa7\x54\xb4\x09\x05"
      "\x04\x08\x40\x00\x20\x01\x07\xc7\x1e\x62\x29\x27\x83\xf4\x0f\xb5\x33\x61"
      "\xf3\x27\x79\x3a\xc4\x4d\xb6\xb1\x4c\xb3\xe8\x1d\xf5\xe0\xd2\xb4\x4e\xe3"
      "\x1a\x54\x45\x36\x3a\x36\xb2\xf4\x74\xe3\xb1\x4b\xda\xfb\x06\xd4\xe2\x03"
      "\xd5\xdf\x69\xa1\x80\x29\x7d\xc6\xb2\xfe\x6a\xa1\x8a\x38\xef\x22\x4d\x7d"
      "\xcb\x6f\xed\xd7\x83\xc4\x81\x03\x8c\x1a\x4f\x85\x53\xd3\xcf\x2f\xf4\x1f"
      "\xd2\x6f\x76\x45\x25\xb8\x35\x69\x1b\xba\xb3\x53\xbf\x2c\x71\x99\x73\xf8"
      "\xc0\xa4\x8f\xca\x59\x40\xa9\xdc\xa0\x6a\x8f\x49\xcf\x0b\x0d\xea\x36\x25"
      "\xb6\x14\x01\x7a\x77\xd1\xaf\x3a\xdc\xf5\x77\xb4\x14\x44\x8a\xe8\x15\x58"
      "\xe8\x1a\x7b\x4d\xa3\x79\xc1\x63\xcb\xd0\x7f\x6c\x9f\xba\xe2\x76\xc0\x14"
      "\x04\xfd\xe2\x33\x7b\xfa\xf5\x4c\x6e\x37\x26\x66\x4d\xd3\xe5\x7b\x1a\x83"
      "\x3a\x80\x33\xfb\xb2\x4c\x5a\xf0\x63\x48\x7f\x92\xb0\x88\xa9\xbc\x01\xd5"
      "\xec\x1a\x6a\x0e\xa2\xac\xfe\x8f\x68\x24\xb2\xc0\xb3\xb0\x68\x31\x07\x70"
      "\x5c\x82\xb4\x85\xa4\x5e\x45\xc2\x6c\xf3\x02\xee\xbb\xa0\x7f\xba\xb3\x0e"
      "\x87\x58\x85\xea\x1f\xe2\xc1\x2a\x07\xca\xcc\x4c\xf8\xd3\x35\x04\x4f\xdc"
      "\x03\x98\xfd\x6d\xf2\x9a\xeb\x92\xda\x6d\xfe\xa1\x5c\x4e\x68\x2d\x94\x2e"
      "\x73\xe4\xab\x0b\x47\x7e\xac\xe7\x27\x33\xaa\xbf\x34\x98\x1d\xac\x79\x93"
      "\xd7\x0f\xb8\xc0\x3d\x1f\x61\x28\x72\x0e\x57\x3e\xcc\x0f\xf5\x37\x8e\xd4"
      "\xe1\x49\x19\x74\x09\x05\x0c\x0c\x08\x00\xdc\x16\x98\x09\x05\x05\x10\x20"
      "\x00\x7f\x09\x40\x09\x0c\x9c\x43\x74\xcd\x46\x8c\x88\x09\x05\x01\x00\x20"
      "\x00\x06\x95\x1f\x09\x05\x03\x0c\x00\x02\x05\x20\x00\x07\x25\x01\x80\x01"
      "\xbc\xff\x49\x24\x00\xcd\x74\xb9\xe6\x3b\xe4\x07\xfe\x2c\x81\xb6\xba\x56"
      "\x19\x8c\xef\xd9\x37\xd5\xe7\x9e\x35\xb0\x67\x85\xff\x7c\xb8\x06\x37\xea"
      "\x8e\x37\xee\xbd\xaa\x6d\x8d\x01\xbb\xb2\x0f\xdf\x9b\xe9\x62\x40\xf7\xb3"
      "\xa5\x82\xc1\xb3\x92\x1b\x3e\xe4\x48\x59\x5e\xfe\x46\x01\x46\x2e\x8a\x57"
      "\x91\x86\xa7\x09\x04\xbc\x04\x03\xaf\x9a\x77\x00\x0a\x24\x01\x4f\x82\xff"
      "\x02\x01\x02\x09\x05\x80\x10\x20\x00\x20\x09\xe9\x1b\x0b\x07\x45\xa1\xbb"
      "\x9d\x9f\x04\xb7\x04\xaa\x17\x4c\xdd\x7c\x7c\x77\x0d\xd2\xf7\x07\x08\x85"
      "\x21\x54\x08\xcb\x0b\x1a\xae\x4c\xbe\x6d\x39\x4c\x6d\xc5\x63\xf5\x72\x38"
      "\xe8\x17\xc0\x1b\x70\x2a\xb6\xbd\x07\xcd\xbc\xea\x0c\x93\x14\x68\x98\x0e"
      "\x85\xd9\x6e\x5a\x3c\xe8\x72\xde\x9a\xa9\x27\x5c\xf8\x78\x0f\xdd\xf4\x6b"
      "\x45\xf5\x05\x9c\x4a\x92\x89\x97\xb2\x63\x65\x82\x91\x52\x18\x5c\x9e\x68"
      "\xb4\xa7\x67\x37\xeb\x5d\xaa\xfa\xb8\x6f\x1b\xa0\x98\xd7\x4d\x27\x1e\xcb"
      "\xb4\x37\x4a\x29\xb6\xe5\x5a\xbe\x50\xbf\x4e\x44\xb0\xda\x1b\x03\xce\x7f"
      "\x3a\x14\x73\xc8\xb1\xa4\x1c\x03\x2a\x64\xea\x35\x50\x0e\xd9\x5e\x10\x5d"
      "\x3c\x34\x71\x1a\x2b\x82\x09\x3a\xfc\xec\x01\xe9\x37\xe9\x28\x51\x05\x29"
      "\x00\x3e\x89\x65\x6e\x11\xb4\x87\x04\xcd\x4e\x99\x5f\xa3\x11\xdd\x57\xed"
      "\x1d\x60\x28\xa2\xf4\x11\xbf\xf9\xb1\xae\x60\x92\xc8\xed\x09\x5b\x5a\xdb"
      "\x32\xf8\x02\xdc\xd7\xa2\x5a\xc9\x42\x58\x5c\xe6\x93\x26\x8a\x5b\xfa\xb8"
      "\x20\x82\x02\x67\x55\x7a\x61\xa6\x09\x05\x02\x00\x60\x00\x00\x08\x06\x09"
      "\x05\x0d\x03\x10\x00\x00\x02\x01\x07\x25\x01\x02\x40\x00\x80\x3a\xc1\xe4"
      "\xab\xdb\xf9\x0f\x39\xcc\x58\x74\x37\x24\x44\xb0\x29\x5d\xb8\x62\x60\x9f"
      "\xc7\xfd",
      3062));
  NONFAILING(syz_usb_connect(/*speed=*/0, /*dev_len=*/0xbdf, /*dev=*/0x20001040,
                             /*conn_descs=*/0));
  close_fds();
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  setup_sysctl();
  install_segv_handler();
  do_sandbox_none();
  return 0;
}