// https://syzkaller.appspot.com/bug?id=0e35393fd821f0570b2a1663a01ac7bdcd15046a
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.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/mount.h>
#include <sys/prctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/usb/ch9.h>
#include <linux/veth.h>

unsigned long long procid;

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

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

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[1024];
};

static struct nlmsg nlmsg;

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;
  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)
{
  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;
  unsigned n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                      (struct sockaddr*)&addr, sizeof(addr));
  if (n != hdr->nlmsg_len)
    exit(1);
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (hdr->nlmsg_type == NLMSG_DONE) {
    *reply_len = 0;
    return 0;
  }
  if (n < sizeof(struct nlmsghdr))
    exit(1);
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))
    exit(1);
  if (hdr->nlmsg_type != NLMSG_ERROR)
    exit(1);
  return -((struct nlmsgerr*)(hdr + 1))->error;
}

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

static int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset,
                            unsigned int total_len)
{
  struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset);
  if (offset == total_len || offset + hdr->nlmsg_len > total_len)
    return -1;
  return hdr->nlmsg_len;
}

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);
  (void)err;
}

const int kInitNetNsFd = 239;

#define DEVLINK_FAMILY_NAME "devlink"

#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_CMD_RELOAD 37
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7
#define DEVLINK_ATTR_NETNS_FD 138

static int netlink_devlink_id_get(struct nlmsg* nlmsg, int sock)
{
  struct genlmsghdr genlhdr;
  struct nlattr* attr;
  int err, n;
  uint16_t id = 0;
  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, DEVLINK_FAMILY_NAME,
               strlen(DEVLINK_FAMILY_NAME) + 1);
  err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n);
  if (err) {
    return -1;
  }
  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) {
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); /* recv ack */
  return id;
}

static void netlink_devlink_netns_move(const char* bus_name,
                                       const char* dev_name, int netns_fd)
{
  struct genlmsghdr genlhdr;
  int sock;
  int id, err;
  sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1)
    exit(1);
  id = netlink_devlink_id_get(&nlmsg, sock);
  if (id == -1)
    goto error;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = DEVLINK_CMD_RELOAD;
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
  netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
  netlink_attr(&nlmsg, DEVLINK_ATTR_NETNS_FD, &netns_fd, sizeof(netns_fd));
  err = netlink_send(&nlmsg, sock);
  if (err) {
  }
error:
  close(sock);
}

static struct nlmsg nlmsg2;

static void initialize_devlink_ports(const char* bus_name, const char* dev_name,
                                     const char* netdev_prefix)
{
  struct genlmsghdr genlhdr;
  int len, total_len, id, err, offset;
  uint16_t netdev_index;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1)
    exit(1);
  int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (rtsock == -1)
    exit(1);
  id = netlink_devlink_id_get(&nlmsg, sock);
  if (id == -1)
    goto error;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = DEVLINK_CMD_PORT_GET;
  netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
  netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
  err = netlink_send_ext(&nlmsg, sock, id, &total_len);
  if (err) {
    goto error;
  }
  offset = 0;
  netdev_index = 0;
  while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) {
    struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN +
                                           NLMSG_ALIGN(sizeof(genlhdr)));
    for (; (char*)attr < nlmsg.buf + offset + len;
         attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
      if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) {
        char* port_name;
        char netdev_name[IFNAMSIZ];
        port_name = (char*)(attr + 1);
        snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix,
                 netdev_index);
        netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0,
                              netdev_name);
        break;
      }
    }
    offset += len;
    netdev_index++;
  }
error:
  close(rtsock);
  close(sock);
}

static void initialize_devlink_pci(void)
{
  int netns = open("/proc/self/ns/net", O_RDONLY);
  if (netns == -1)
    exit(1);
  int ret = setns(kInitNetNsFd, 0);
  if (ret == -1)
    exit(1);
  netlink_devlink_netns_move("pci", "0000:00:10.0", netns);
  ret = setns(netns, 0);
  if (ret == -1)
    exit(1);
  close(netns);
  initialize_devlink_ports("pci", "0000:00:10.0", "netpci");
}

#define MAX_FDS 30

#define USB_MAX_IFACE_NUM 4
#define USB_MAX_EP_NUM 32

struct usb_iface_index {
  struct usb_interface_descriptor* iface;
  uint8_t bInterfaceNumber;
  uint8_t bAlternateSetting;
  uint8_t bInterfaceClass;
  struct usb_endpoint_descriptor 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;
};

static bool parse_usb_descriptor(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], buffer + offset,
               sizeof(iface->eps[iface->eps_num]));
        iface->eps_num++;
      }
    }
    offset += desc_length;
  }
  return true;
}

struct usb_raw_init {
  __u64 speed;
  const __u8* driver_name;
  const __u8* device_name;
};

enum usb_raw_event_type {
  USB_RAW_EVENT_INVALID,
  USB_RAW_EVENT_CONNECT,
  USB_RAW_EVENT_CONTROL,
};

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_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)

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;
  arg.speed = speed;
  arg.driver_name = (const __u8*)driver;
  arg.device_name = (const __u8*)device;
  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_event_fetch(int fd, struct usb_raw_event* event)
{
  return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event);
}

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_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_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);
}

#define MAX_USB_FDS 6

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

static struct usb_info usb_devices[MAX_USB_FDS];
static int usb_devices_num;

static struct usb_device_index* add_usb_index(int fd, char* dev, size_t dev_len)
{
  int i = __atomic_fetch_add(&usb_devices_num, 1, __ATOMIC_RELAXED);
  if (i >= MAX_USB_FDS)
    return NULL;
  int rv = 0;
  rv = parse_usb_descriptor(dev, dev_len, &usb_devices[i].index);
  if (!rv)
    return NULL;
  __atomic_store_n(&usb_devices[i].fd, fd, __ATOMIC_RELEASE);
  return &usb_devices[i].index;
}

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

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

#define USB_MAX_PACKET_SIZE 1024

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];
};

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(int fd,
                                    struct vusb_connect_descriptors* descs,
                                    struct usb_ctrlrequest* ctrl,
                                    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) {
          struct usb_qualifier_descriptor* qual =
              (struct usb_qualifier_descriptor*)response_data;
          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_length = sizeof(*qual);
          return true;
        }
        *response_data = descs->qual;
        *response_length = descs->qual_len;
        return true;
      default:
        exit(1);
        return false;
      }
      break;
    default:
      exit(1);
      return false;
    }
    break;
  default:
    exit(1);
    return false;
  }
  return false;
}

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;
  char* dev = (char*)a2;
  struct vusb_connect_descriptors* descs = (struct vusb_connect_descriptors*)a3;
  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;
    bool response_found = false;
    char* response_data = NULL;
    uint32_t response_length = 0;
    if (event.ctrl.bRequestType & USB_DIR_IN) {
      response_found = lookup_connect_response(
          fd, descs, &event.ctrl, &response_data, &response_length);
      if (!response_found) {
        return -1;
      }
    } else {
      if ((event.ctrl.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD ||
          event.ctrl.bRequest != USB_REQ_SET_CONFIGURATION) {
        exit(1);
        return -1;
      }
      done = true;
    }
    if (done) {
      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 void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

void execute_one(void)
{
  *(uint8_t*)0x20001880 = 0x12;
  *(uint8_t*)0x20001881 = 1;
  *(uint16_t*)0x20001882 = 0xa45e;
  *(uint8_t*)0x20001884 = 0xb5;
  *(uint8_t*)0x20001885 = 0x4e;
  *(uint8_t*)0x20001886 = 0xbb;
  *(uint8_t*)0x20001887 = 0x10;
  *(uint16_t*)0x20001888 = 0x8ca;
  *(uint16_t*)0x2000188a = 0x22;
  *(uint16_t*)0x2000188c = 0x4bd6;
  *(uint8_t*)0x2000188e = 1;
  *(uint8_t*)0x2000188f = 2;
  *(uint8_t*)0x20001890 = 3;
  *(uint8_t*)0x20001891 = 1;
  *(uint8_t*)0x20001892 = 9;
  *(uint8_t*)0x20001893 = 2;
  *(uint16_t*)0x20001894 = 0x13b;
  *(uint8_t*)0x20001896 = 2;
  *(uint8_t*)0x20001897 = 0x20;
  *(uint8_t*)0x20001898 = 0x60;
  *(uint8_t*)0x20001899 = 0x80;
  *(uint8_t*)0x2000189a = 0;
  *(uint8_t*)0x2000189b = 9;
  *(uint8_t*)0x2000189c = 4;
  *(uint8_t*)0x2000189d = 0x4a;
  *(uint8_t*)0x2000189e = 0;
  *(uint8_t*)0x2000189f = 2;
  *(uint8_t*)0x200018a0 = 0x57;
  *(uint8_t*)0x200018a1 = 0x2d;
  *(uint8_t*)0x200018a2 = 0x23;
  *(uint8_t*)0x200018a3 = 6;
  *(uint8_t*)0x200018a4 = 5;
  *(uint8_t*)0x200018a5 = 0x24;
  *(uint8_t*)0x200018a6 = 6;
  *(uint8_t*)0x200018a7 = 0;
  *(uint8_t*)0x200018a8 = 1;
  *(uint8_t*)0x200018a9 = 5;
  *(uint8_t*)0x200018aa = 0x24;
  *(uint8_t*)0x200018ab = 0;
  *(uint16_t*)0x200018ac = 0x1ff;
  *(uint8_t*)0x200018ae = 0xd;
  *(uint8_t*)0x200018af = 0x24;
  *(uint8_t*)0x200018b0 = 0xf;
  *(uint8_t*)0x200018b1 = 1;
  *(uint32_t*)0x200018b2 = 0x433e;
  *(uint16_t*)0x200018b6 = 6;
  *(uint16_t*)0x200018b8 = 8;
  *(uint8_t*)0x200018ba = 0;
  *(uint8_t*)0x200018bb = 6;
  *(uint8_t*)0x200018bc = 0x24;
  *(uint8_t*)0x200018bd = 0x1a;
  *(uint16_t*)0x200018be = 3;
  *(uint8_t*)0x200018c0 = 0xfb;
  *(uint8_t*)0x200018c1 = 5;
  *(uint8_t*)0x200018c2 = 0x24;
  *(uint8_t*)0x200018c3 = 1;
  *(uint8_t*)0x200018c4 = 2;
  *(uint8_t*)0x200018c5 = 0xf7;
  *(uint8_t*)0x200018c6 = 0x10;
  *(uint8_t*)0x200018c7 = 0x24;
  *(uint8_t*)0x200018c8 = 7;
  *(uint8_t*)0x200018c9 = 4;
  *(uint16_t*)0x200018ca = 0x7f;
  *(uint16_t*)0x200018cc = 5;
  *(uint16_t*)0x200018ce = 0xff;
  *(uint16_t*)0x200018d0 = 6;
  *(uint16_t*)0x200018d2 = 9;
  *(uint16_t*)0x200018d4 = 0x81;
  *(uint8_t*)0x200018d6 = 5;
  *(uint8_t*)0x200018d7 = 0x24;
  *(uint8_t*)0x200018d8 = 0x15;
  *(uint16_t*)0x200018d9 = 9;
  *(uint8_t*)0x200018db = 7;
  *(uint8_t*)0x200018dc = 0x24;
  *(uint8_t*)0x200018dd = 0x14;
  *(uint16_t*)0x200018de = 0x7fff;
  *(uint16_t*)0x200018e0 = 0xfffe;
  *(uint8_t*)0x200018e2 = 0xc;
  *(uint8_t*)0x200018e3 = 0x24;
  *(uint8_t*)0x200018e4 = 0x1b;
  *(uint16_t*)0x200018e5 = 5;
  *(uint16_t*)0x200018e7 = 0xf22e;
  *(uint8_t*)0x200018e9 = 8;
  *(uint8_t*)0x200018ea = 3;
  *(uint16_t*)0x200018eb = 9;
  *(uint8_t*)0x200018ed = 1;
  *(uint8_t*)0x200018ee = 4;
  *(uint8_t*)0x200018ef = 0x24;
  *(uint8_t*)0x200018f0 = 0x13;
  *(uint8_t*)0x200018f1 = 9;
  *(uint8_t*)0x200018f2 = 9;
  *(uint8_t*)0x200018f3 = 5;
  *(uint8_t*)0x200018f4 = 0xe;
  *(uint8_t*)0x200018f5 = 3;
  *(uint16_t*)0x200018f6 = 0x362;
  *(uint8_t*)0x200018f8 = -1;
  *(uint8_t*)0x200018f9 = 0x7f;
  *(uint8_t*)0x200018fa = 1;
  *(uint8_t*)0x200018fb = 7;
  *(uint8_t*)0x200018fc = 0x25;
  *(uint8_t*)0x200018fd = 1;
  *(uint8_t*)0x200018fe = 0;
  *(uint8_t*)0x200018ff = 0;
  *(uint16_t*)0x20001900 = 7;
  *(uint8_t*)0x20001902 = 2;
  *(uint8_t*)0x20001903 = 0x11;
  *(uint8_t*)0x20001904 = 9;
  *(uint8_t*)0x20001905 = 5;
  *(uint8_t*)0x20001906 = 6;
  *(uint8_t*)0x20001907 = 1;
  *(uint16_t*)0x20001908 = 0x395;
  *(uint8_t*)0x2000190a = 8;
  *(uint8_t*)0x2000190b = 1;
  *(uint8_t*)0x2000190c = 0x3f;
  *(uint8_t*)0x2000190d = 7;
  *(uint8_t*)0x2000190e = 0x25;
  *(uint8_t*)0x2000190f = 1;
  *(uint8_t*)0x20001910 = 0;
  *(uint8_t*)0x20001911 = 1;
  *(uint16_t*)0x20001912 = 7;
  *(uint8_t*)0x20001914 = 2;
  *(uint8_t*)0x20001915 = 0x22;
  *(uint8_t*)0x20001916 = 9;
  *(uint8_t*)0x20001917 = 4;
  *(uint8_t*)0x20001918 = 0x45;
  *(uint8_t*)0x20001919 = 2;
  *(uint8_t*)0x2000191a = 3;
  *(uint8_t*)0x2000191b = 0x67;
  *(uint8_t*)0x2000191c = 0xaf;
  *(uint8_t*)0x2000191d = 0x5a;
  *(uint8_t*)0x2000191e = 3;
  *(uint8_t*)0x2000191f = 5;
  *(uint8_t*)0x20001920 = 0x24;
  *(uint8_t*)0x20001921 = 6;
  *(uint8_t*)0x20001922 = 0;
  *(uint8_t*)0x20001923 = 0;
  *(uint8_t*)0x20001924 = 5;
  *(uint8_t*)0x20001925 = 0x24;
  *(uint8_t*)0x20001926 = 0;
  *(uint16_t*)0x20001927 = 9;
  *(uint8_t*)0x20001929 = 0xd;
  *(uint8_t*)0x2000192a = 0x24;
  *(uint8_t*)0x2000192b = 0xf;
  *(uint8_t*)0x2000192c = 1;
  *(uint32_t*)0x2000192d = 0x8001;
  *(uint16_t*)0x20001931 = 2;
  *(uint16_t*)0x20001933 = 9;
  *(uint8_t*)0x20001935 = 3;
  *(uint8_t*)0x20001936 = 0xc;
  *(uint8_t*)0x20001937 = 0x24;
  *(uint8_t*)0x20001938 = 0x1b;
  *(uint16_t*)0x20001939 = 0x3ff;
  *(uint16_t*)0x2000193b = 6;
  *(uint8_t*)0x2000193d = 0xe4;
  *(uint8_t*)0x2000193e = 0x56;
  *(uint16_t*)0x2000193f = 0x1f;
  *(uint8_t*)0x20001941 = 0xd8;
  *(uint8_t*)0x20001942 = 5;
  *(uint8_t*)0x20001943 = 0x24;
  *(uint8_t*)0x20001944 = 1;
  *(uint8_t*)0x20001945 = 1;
  *(uint8_t*)0x20001946 = 1;
  *(uint8_t*)0x20001947 = 6;
  *(uint8_t*)0x20001948 = 0x24;
  *(uint8_t*)0x20001949 = 0x1a;
  *(uint16_t*)0x2000194a = 0xf800;
  *(uint8_t*)0x2000194c = 5;
  *(uint8_t*)0x2000194d = 8;
  *(uint8_t*)0x2000194e = 0x24;
  *(uint8_t*)0x2000194f = 0x1c;
  *(uint16_t*)0x20001950 = 8;
  *(uint8_t*)0x20001952 = 8;
  *(uint16_t*)0x20001953 = 0x180;
  *(uint8_t*)0x20001955 = 0x46;
  *(uint8_t*)0x20001956 = 4;
  memcpy((void*)0x20001957,
         "\xa8\x7c\x44\x56\x64\x7d\x7d\x46\x2c\x25\x3f\xef\x17\x03\xb6\x19\x4f"
         "\x6b\x33\x36\x53\x51\x74\x57\x4f\x73\xcc\x70\x0b\x21\x5a\x8f\xcd\x51"
         "\x99\xe8\x33\xd3\x74\x90\x10\x2b\x2f\x7d\xf5\xb1\x42\xde\x9c\x1a\x38"
         "\xf4\x48\x9b\xfe\x4c\x77\x04\x1e\xcd\x0d\x65\xb6\x62\x5f\xda\x91\x4a",
         68);
  *(uint8_t*)0x2000199b = 9;
  *(uint8_t*)0x2000199c = 5;
  *(uint8_t*)0x2000199d = 0x8b;
  *(uint8_t*)0x2000199e = 2;
  *(uint16_t*)0x2000199f = 0x12c;
  *(uint8_t*)0x200019a1 = 7;
  *(uint8_t*)0x200019a2 = 0x1a;
  *(uint8_t*)0x200019a3 = 2;
  *(uint8_t*)0x200019a4 = 9;
  *(uint8_t*)0x200019a5 = 5;
  *(uint8_t*)0x200019a6 = 0;
  *(uint8_t*)0x200019a7 = 0xc;
  *(uint16_t*)0x200019a8 = 0x9a;
  *(uint8_t*)0x200019aa = 0x4f;
  *(uint8_t*)0x200019ab = 6;
  *(uint8_t*)0x200019ac = 0xe9;
  *(uint8_t*)0x200019ad = 7;
  *(uint8_t*)0x200019ae = 0x25;
  *(uint8_t*)0x200019af = 1;
  *(uint8_t*)0x200019b0 = 0x80;
  *(uint8_t*)0x200019b1 = 0xa8;
  *(uint16_t*)0x200019b2 = 0x40;
  *(uint8_t*)0x200019b4 = 2;
  *(uint8_t*)0x200019b5 = 0xc;
  *(uint8_t*)0x200019b6 = 9;
  *(uint8_t*)0x200019b7 = 5;
  *(uint8_t*)0x200019b8 = 7;
  *(uint8_t*)0x200019b9 = 0xc;
  *(uint16_t*)0x200019ba = 0xf;
  *(uint8_t*)0x200019bc = 1;
  *(uint8_t*)0x200019bd = 2;
  *(uint8_t*)0x200019be = -1;
  *(uint8_t*)0x200019bf = 7;
  *(uint8_t*)0x200019c0 = 0x25;
  *(uint8_t*)0x200019c1 = 1;
  *(uint8_t*)0x200019c2 = 4;
  *(uint8_t*)0x200019c3 = 0x20;
  *(uint16_t*)0x200019c4 = 0;
  *(uint8_t*)0x200019c6 = 7;
  *(uint8_t*)0x200019c7 = 0x25;
  *(uint8_t*)0x200019c8 = 1;
  *(uint8_t*)0x200019c9 = 0xc2;
  *(uint8_t*)0x200019ca = 0x3f;
  *(uint16_t*)0x200019cb = 0x100;
  *(uint32_t*)0x20001f80 = 0;
  *(uint64_t*)0x20001f84 = 0;
  *(uint32_t*)0x20001f8c = 0;
  *(uint64_t*)0x20001f90 = 0;
  *(uint32_t*)0x20001f98 = 6;
  *(uint32_t*)0x20001f9c = 0;
  *(uint64_t*)0x20001fa0 = 0;
  *(uint32_t*)0x20001fa8 = 0;
  *(uint64_t*)0x20001fac = 0;
  *(uint32_t*)0x20001fb4 = 0;
  *(uint64_t*)0x20001fb8 = 0;
  *(uint32_t*)0x20001fc0 = 0;
  *(uint64_t*)0x20001fc4 = 0;
  *(uint32_t*)0x20001fcc = 0;
  *(uint64_t*)0x20001fd0 = 0;
  *(uint32_t*)0x20001fd8 = 0;
  *(uint64_t*)0x20001fdc = 0;
  syz_usb_connect(5, 0x14d, 0x20001880, 0x20001f80);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  loop();
  return 0;
}