// https://syzkaller.appspot.com/bug?id=4a7701a1b774b709692d2dc902c3a02408f1c203
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/usb/ch9.h>

static unsigned long long procid;

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

#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;
}

struct vusb_descriptor {
  uint8_t req_type;
  uint8_t desc_type;
  uint32_t len;
  char data[0];
} __attribute__((packed));

struct vusb_descriptors {
  uint32_t len;
  struct vusb_descriptor* generic;
  struct vusb_descriptor* descs[0];
} __attribute__((packed));

struct vusb_response {
  uint8_t type;
  uint8_t req;
  uint32_t len;
  char data[0];
} __attribute__((packed));

struct vusb_responses {
  uint32_t len;
  struct vusb_response* generic;
  struct vusb_response* resps[0];
} __attribute__((packed));

static bool lookup_control_response(const struct vusb_descriptors* descs,
                                    const struct vusb_responses* resps,
                                    struct usb_ctrlrequest* ctrl,
                                    char** response_data,
                                    uint32_t* response_length)
{
  int descs_num = 0;
  int resps_num = 0;
  if (descs)
    descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) /
                sizeof(descs->descs[0]);
  if (resps)
    resps_num = (resps->len - offsetof(struct vusb_responses, resps)) /
                sizeof(resps->resps[0]);
  uint8_t req = ctrl->bRequest;
  uint8_t req_type = ctrl->bRequestType & USB_TYPE_MASK;
  uint8_t desc_type = ctrl->wValue >> 8;
  if (req == USB_REQ_GET_DESCRIPTOR) {
    int i;
    for (i = 0; i < descs_num; i++) {
      struct vusb_descriptor* desc = descs->descs[i];
      if (!desc)
        continue;
      if (desc->req_type == req_type && desc->desc_type == desc_type) {
        *response_length = desc->len;
        if (*response_length != 0)
          *response_data = &desc->data[0];
        else
          *response_data = NULL;
        return true;
      }
    }
    if (descs && descs->generic) {
      *response_data = &descs->generic->data[0];
      *response_length = descs->generic->len;
      return true;
    }
  } else {
    int i;
    for (i = 0; i < resps_num; i++) {
      struct vusb_response* resp = resps->resps[i];
      if (!resp)
        continue;
      if (resp->type == req_type && resp->req == req) {
        *response_length = resp->len;
        if (*response_length != 0)
          *response_data = &resp->data[0];
        else
          *response_data = NULL;
        return true;
      }
    }
    if (resps && resps->generic) {
      *response_data = &resps->generic->data[0];
      *response_length = resps->generic->len;
      return true;
    }
  }
  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_ep_write(int fd, struct usb_raw_ep_io* io)
{
  return ioctl(fd, USB_RAW_IOCTL_EP_WRITE, io);
}

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);
}

static int lookup_interface(int fd, uint8_t bInterfaceNumber,
                            uint8_t bAlternateSetting)
{
  struct usb_device_index* index = lookup_usb_index(fd);
  if (!index)
    return -1;
  for (int i = 0; i < index->ifaces_num; i++) {
    if (index->ifaces[i].bInterfaceNumber == bInterfaceNumber &&
        index->ifaces[i].bAlternateSetting == bAlternateSetting)
      return i;
  }
  return -1;
}

static int lookup_endpoint(int fd, uint8_t bEndpointAddress)
{
  struct usb_device_index* index = lookup_usb_index(fd);
  if (!index)
    return -1;
  if (index->iface_cur < 0)
    return -1;
  for (int ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++)
    if (index->ifaces[index->iface_cur].eps[ep].desc.bEndpointAddress ==
        bEndpointAddress)
      return index->ifaces[index->iface_cur].eps[ep].handle;
  return -1;
}

#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);
}

static volatile long syz_usb_control_io(volatile long a0, volatile long a1,
                                        volatile long a2)
{
  int fd = a0;
  const struct vusb_descriptors* descs = (const struct vusb_descriptors*)a1;
  const struct vusb_responses* resps = (const struct vusb_responses*)a2;
  struct usb_raw_control_event event;
  event.inner.type = 0;
  event.inner.length = USB_MAX_PACKET_SIZE;
  int rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event);
  if (rv < 0) {
    return rv;
  }
  if (event.inner.type != USB_RAW_EVENT_CONTROL) {
    return -1;
  }
  char* response_data = NULL;
  uint32_t response_length = 0;
  if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) {
    if (!lookup_control_response(descs, resps, &event.ctrl, &response_data,
                                 &response_length)) {
      usb_raw_ep0_stall(fd);
      return -1;
    }
  } else {
    if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD ||
        event.ctrl.bRequest == USB_REQ_SET_INTERFACE) {
      int iface_num = event.ctrl.wIndex;
      int alt_set = event.ctrl.wValue;
      int iface_index = lookup_interface(fd, iface_num, alt_set);
      if (iface_index < 0) {
      } else {
        set_interface(fd, iface_index);
      }
    }
    response_length = event.ctrl.wLength;
  }
  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;
  if ((event.ctrl.bRequestType & USB_DIR_IN) && !event.ctrl.wLength) {
    response_length = USB_MAX_PACKET_SIZE;
  }
  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) && event.ctrl.wLength) {
    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 0;
}

static volatile long syz_usb_ep_write(volatile long a0, volatile long a1,
                                      volatile long a2, volatile long a3)
{
  int fd = a0;
  uint8_t ep = a1;
  uint32_t len = a2;
  char* data = (char*)a3;
  int ep_handle = lookup_endpoint(fd, ep);
  if (ep_handle < 0) {
    return -1;
  }
  struct usb_raw_ep_io_data io_data;
  io_data.inner.ep = ep_handle;
  io_data.inner.flags = 0;
  if (len > sizeof(io_data.data))
    len = sizeof(io_data.data);
  io_data.inner.length = len;
  memcpy(&io_data.data[0], data, len);
  int rv = usb_raw_ep_write(fd, (struct usb_raw_ep_io*)&io_data);
  if (rv < 0) {
    return rv;
  }
  sleep_ms(200);
  return 0;
}

static volatile long syz_usb_disconnect(volatile long a0)
{
  int fd = a0;
  int rv = close(fd);
  sleep_ms(200);
  return rv;
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_usb_connect$hid arguments: [
  //    speed: usb_device_speed = 0x0 (8 bytes)
  //    dev_len: len = 0x36 (8 bytes)
  //    dev: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {12 01 00 00 00 00 00 40 26 09 33 33 40 00 00 00
  //          00 01 09 02 24 00 01 00 00 00 00 09 04 00 00 01 03 01 00 00 09 21
  //          00 00 00 01 22 01 00 09 05 81 03 08} (length 0x32)
  //        }
  //      }
  //    }
  //    conn_descs: nil
  //  ]
  //  returns fd_usb_hid
  memcpy((void*)0x200000000000,
         "\x12\x01\x00\x00\x00\x00\x00\x40\x26\x09\x33\x33\x40\x00\x00\x00\x00"
         "\x01\x09\x02\x24\x00\x01\x00\x00\x00\x00\x09\x04\x00\x00\x01\x03\x01"
         "\x00\x00\x09\x21\x00\x00\x00\x01\x22\x01\x00\x09\x05\x81\x03\x08",
         50);
  res = -1;
  res = syz_usb_connect(/*speed=*/0, /*dev_len=*/0x36, /*dev=*/0x200000000000,
                        /*conn_descs=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$KDFONTOP_SET arguments: [
  //    fd: fd_tty (resource)
  //    cmd: const = 0x4b72 (4 bytes)
  //    arg: ptr[in, console_font_op[KD_FONT_OP_SET, in]] {
  //      console_font_op[KD_FONT_OP_SET, in] {
  //        op: const = 0x4 (4 bytes)
  //        flags: int32 = 0x0 (4 bytes)
  //        width: int32 = 0x5 (4 bytes)
  //        height: int32 = 0x0 (4 bytes)
  //        charcount: int32 = 0x100 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        data: ptr[in, buffer] {
  //          buffer: {38 7e d7 62 6d 85 05 09 a2 d6 c1 aa 38 f1 5c d0 0f 85 c2
  //          63 cb 22 6d b6 71 26 1f ff 7c e9 c5 55 f1 8d af ae 35 30 db 6d d4
  //          93 f2 a3 cc 88 69 1b 9a e2 1b 3e 3b 45 23 ae 25 c1 e2 7d 8f 62 b4
  //          80 c4 16 0b 1f 90 ac 9c 41 fa e6 ab 12 ac 4c 11 3f ef 58 86 84 ef
  //          49 4c 89 09 28 83 b9 02 a4 1c d7 53 87 ef 6f 7b c7 d4 60 d5 e6 65
  //          f3 98 ff 95 59 6d c9 4e c9 70 03 c7 e6 f3 c8 2f bd 8d e6 e1 1a a4
  //          03 3d 61 c5 1c af 7a 65 a2 b6 13 bd a3 3f 3e ae ae 63 5d 7c d8 17
  //          61 e7 4c 38 a7 69 58 00 a1 55 16 eb 33 70 56 e0 23 35 f9 a7 d1 0a
  //          a2 ea f7 be b7 e1 ae d6 e8 50 ec b3 42 11 43 c5 c4 de d0 f0 6a ff
  //          c5 24 dc f3 20 82 72 61 9b 6a 95 2d b5 bc 96 14 1b 26 87 a3 b6 f7
  //          aa df 50 bc 54 99 74 b6 40 1a 19 cd b1 30 28 2b 95 55 92 ef a9 42
  //          42 06 5a 4c 8d 69 5a 2c dd 9a da 35 0d ef d5 8c 77 5b 92 d3 48 30
  //          77 74 d3 a2 56 c7 52 0b 28 5d 8d a0 db f5 e2 0d 60 44 13 ed 2d df
  //          9b cb f8 81 ca f8 11 85 28 06 17 5d 63 89 2a 15 23 4f bc d7 a8 8a
  //          2a 0a ea 45 d1 91 48 f0 e7 da da 7d 6d 0d 77 88 b8 eb fd ea a0 28
  //          4a be 90 b8 8d ff f4 12 bf f4 0c 31 c6 41 5c 54 ae 33 35 e5 4a 49
  //          d3 15 85 1f ef fe 30 d9 99 c3 6d ef 4d f7 df 74 76 95 ef bd 64 9f
  //          42 f3 10 85 91 22 c0 d2 c1 e5 58 dc 65 86 95 8a 28 37 62 38 6e cf
  //          36 92 74 e4 30 03 a0 fd ff 59 ea 51 5e b4 45 21 90 1e f0 d0 0b aa
  //          91 c1 0a 8e 44 a7 6a ac 34 68 a1 5b d3 d4 5a d3 89 97 74 67 f3 06
  //          f9 bc de 07 1b 30 76 97 95 ee d2 f1 58 04 14 d1 68 f5 57 cd 90 04
  //          0c 4b d2 a3 d6 bc 50 92 54 8f ea ef 72 04 a1 2c ec e5 91 81 fc b5
  //          ba d8 c2 4b d9 f8 f7 8d 17 ab 82 83 13 25 50 1e 80 d8 00 f4 dd 9f
  //          45 65 7f 82 24 fc 78 eb 11 68 fe 05 27 fa c3 34 66 aa df 48 f1 69
  //          94 d2 9a 47 77 85 66 e0 f3 94 5b 2b f3 6b 6e ec c7 fa 18 91 4b eb
  //          66 ac 9e 51 9b d3 33 b3 0d 3c e2 f5 0d dd ee a3 44 7a eb be 3b ed
  //          78 1e 39 d5 a0 fb 0c dc 60 e1 96 f2 26 13 05 fe b5 96 b6 89 86 af
  //          3e ee 7b 19 9f ef b5 f7 9f fb 2d 10 50 e4 69 82 af 1c 14 a8 8d d9
  //          00 04 00 00 2f 56 a8 40 47 55 c7 3e 74 bb 90 e6 4b ab 90 7d 14 df
  //          8a a9 df 6f 40 a8 0a ce 2b b8 a2 aa d3 b0 c6 69 15 92 7d b4 23 31
  //          81 94 3d 88 c0 c7 6d 59 69 e2 04 3d b5 bd 77 fd 60 ba 0f 01 31 39
  //          92 9c cf ec 96 04 00 00 00 85 a4 d2 33 32 ba 1f 08 75 e3 14 6a fe
  //          f5 b2 0c c3 06 d3 ec ee 65 94 4f e9 82 9e 0a d0 c3 f6 bb 2f d8 1b
  //          c3 11 52 53 8d b5 0f 47 dc 38 ba 90 8a 0d 80 86 87 e4 78 a6 09 fe
  //          0d aa 02 d4 e9 c6 18 b9 92 66 e7 f2 e9 85 97 e2 81 3e 1d ba 9c 3c
  //          16 e9 fa b3 bd a6 ed 33 cb 1c 75 51 3e 22 64 b6 9d 47 2d d0 e1 33
  //          86 88 ba 78 2b 41 bd e1 41 f9 9c 48 94 de d9 8e ff 9a a5 3d 22 eb
  //          77 c9 d9 31 69 c0 4a b2 49 0b f2 81 06 f7 70 e0 7e b7 a9 e8 7d de
  //          71 82 9f 91 8b 98 c4 cb fc b1 1a 90 13 92 64 a9 ee 80 81 97 31 67
  //          f4 93 76 02 78 df 0c c3 4b e9 e8 f8 6f 94 8d 9a 62 e6 3a d6 ca 9d
  //          21 95 ff 9c 63 20 c8 5b dd c4 29 15 07 00 00 00 00 00 00 00 21 95
  //          a3 d6 4e 04 c9 ec d1 c3 13 c0 8e 29 b8 14 bd 8f ed 1a b6 d2 84 6c
  //          73 34 59 62 89 5d 28 9a c7 71 52 ca c2 e0 e3 2b 75 ce 81 47 31 c5
  //          42 09 1f 21 8d d1 e6 8a 15 d3 4c a7 a8 19 c8 5e 80 05 55 db 64 a7
  //          17 eb 23 a8 11 35 6d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x400)
  //        }
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000080 = 4;
  *(uint32_t*)0x200000000084 = 0;
  *(uint32_t*)0x200000000088 = 5;
  *(uint32_t*)0x20000000008c = 0;
  *(uint32_t*)0x200000000090 = 0x100;
  *(uint64_t*)0x200000000098 = 0x2000000000c0;
  memcpy(
      (void*)0x2000000000c0,
      "\x38\x7e\xd7\x62\x6d\x85\x05\x09\xa2\xd6\xc1\xaa\x38\xf1\x5c\xd0\x0f\x85"
      "\xc2\x63\xcb\x22\x6d\xb6\x71\x26\x1f\xff\x7c\xe9\xc5\x55\xf1\x8d\xaf\xae"
      "\x35\x30\xdb\x6d\xd4\x93\xf2\xa3\xcc\x88\x69\x1b\x9a\xe2\x1b\x3e\x3b\x45"
      "\x23\xae\x25\xc1\xe2\x7d\x8f\x62\xb4\x80\xc4\x16\x0b\x1f\x90\xac\x9c\x41"
      "\xfa\xe6\xab\x12\xac\x4c\x11\x3f\xef\x58\x86\x84\xef\x49\x4c\x89\x09\x28"
      "\x83\xb9\x02\xa4\x1c\xd7\x53\x87\xef\x6f\x7b\xc7\xd4\x60\xd5\xe6\x65\xf3"
      "\x98\xff\x95\x59\x6d\xc9\x4e\xc9\x70\x03\xc7\xe6\xf3\xc8\x2f\xbd\x8d\xe6"
      "\xe1\x1a\xa4\x03\x3d\x61\xc5\x1c\xaf\x7a\x65\xa2\xb6\x13\xbd\xa3\x3f\x3e"
      "\xae\xae\x63\x5d\x7c\xd8\x17\x61\xe7\x4c\x38\xa7\x69\x58\x00\xa1\x55\x16"
      "\xeb\x33\x70\x56\xe0\x23\x35\xf9\xa7\xd1\x0a\xa2\xea\xf7\xbe\xb7\xe1\xae"
      "\xd6\xe8\x50\xec\xb3\x42\x11\x43\xc5\xc4\xde\xd0\xf0\x6a\xff\xc5\x24\xdc"
      "\xf3\x20\x82\x72\x61\x9b\x6a\x95\x2d\xb5\xbc\x96\x14\x1b\x26\x87\xa3\xb6"
      "\xf7\xaa\xdf\x50\xbc\x54\x99\x74\xb6\x40\x1a\x19\xcd\xb1\x30\x28\x2b\x95"
      "\x55\x92\xef\xa9\x42\x42\x06\x5a\x4c\x8d\x69\x5a\x2c\xdd\x9a\xda\x35\x0d"
      "\xef\xd5\x8c\x77\x5b\x92\xd3\x48\x30\x77\x74\xd3\xa2\x56\xc7\x52\x0b\x28"
      "\x5d\x8d\xa0\xdb\xf5\xe2\x0d\x60\x44\x13\xed\x2d\xdf\x9b\xcb\xf8\x81\xca"
      "\xf8\x11\x85\x28\x06\x17\x5d\x63\x89\x2a\x15\x23\x4f\xbc\xd7\xa8\x8a\x2a"
      "\x0a\xea\x45\xd1\x91\x48\xf0\xe7\xda\xda\x7d\x6d\x0d\x77\x88\xb8\xeb\xfd"
      "\xea\xa0\x28\x4a\xbe\x90\xb8\x8d\xff\xf4\x12\xbf\xf4\x0c\x31\xc6\x41\x5c"
      "\x54\xae\x33\x35\xe5\x4a\x49\xd3\x15\x85\x1f\xef\xfe\x30\xd9\x99\xc3\x6d"
      "\xef\x4d\xf7\xdf\x74\x76\x95\xef\xbd\x64\x9f\x42\xf3\x10\x85\x91\x22\xc0"
      "\xd2\xc1\xe5\x58\xdc\x65\x86\x95\x8a\x28\x37\x62\x38\x6e\xcf\x36\x92\x74"
      "\xe4\x30\x03\xa0\xfd\xff\x59\xea\x51\x5e\xb4\x45\x21\x90\x1e\xf0\xd0\x0b"
      "\xaa\x91\xc1\x0a\x8e\x44\xa7\x6a\xac\x34\x68\xa1\x5b\xd3\xd4\x5a\xd3\x89"
      "\x97\x74\x67\xf3\x06\xf9\xbc\xde\x07\x1b\x30\x76\x97\x95\xee\xd2\xf1\x58"
      "\x04\x14\xd1\x68\xf5\x57\xcd\x90\x04\x0c\x4b\xd2\xa3\xd6\xbc\x50\x92\x54"
      "\x8f\xea\xef\x72\x04\xa1\x2c\xec\xe5\x91\x81\xfc\xb5\xba\xd8\xc2\x4b\xd9"
      "\xf8\xf7\x8d\x17\xab\x82\x83\x13\x25\x50\x1e\x80\xd8\x00\xf4\xdd\x9f\x45"
      "\x65\x7f\x82\x24\xfc\x78\xeb\x11\x68\xfe\x05\x27\xfa\xc3\x34\x66\xaa\xdf"
      "\x48\xf1\x69\x94\xd2\x9a\x47\x77\x85\x66\xe0\xf3\x94\x5b\x2b\xf3\x6b\x6e"
      "\xec\xc7\xfa\x18\x91\x4b\xeb\x66\xac\x9e\x51\x9b\xd3\x33\xb3\x0d\x3c\xe2"
      "\xf5\x0d\xdd\xee\xa3\x44\x7a\xeb\xbe\x3b\xed\x78\x1e\x39\xd5\xa0\xfb\x0c"
      "\xdc\x60\xe1\x96\xf2\x26\x13\x05\xfe\xb5\x96\xb6\x89\x86\xaf\x3e\xee\x7b"
      "\x19\x9f\xef\xb5\xf7\x9f\xfb\x2d\x10\x50\xe4\x69\x82\xaf\x1c\x14\xa8\x8d"
      "\xd9\x00\x04\x00\x00\x2f\x56\xa8\x40\x47\x55\xc7\x3e\x74\xbb\x90\xe6\x4b"
      "\xab\x90\x7d\x14\xdf\x8a\xa9\xdf\x6f\x40\xa8\x0a\xce\x2b\xb8\xa2\xaa\xd3"
      "\xb0\xc6\x69\x15\x92\x7d\xb4\x23\x31\x81\x94\x3d\x88\xc0\xc7\x6d\x59\x69"
      "\xe2\x04\x3d\xb5\xbd\x77\xfd\x60\xba\x0f\x01\x31\x39\x92\x9c\xcf\xec\x96"
      "\x04\x00\x00\x00\x85\xa4\xd2\x33\x32\xba\x1f\x08\x75\xe3\x14\x6a\xfe\xf5"
      "\xb2\x0c\xc3\x06\xd3\xec\xee\x65\x94\x4f\xe9\x82\x9e\x0a\xd0\xc3\xf6\xbb"
      "\x2f\xd8\x1b\xc3\x11\x52\x53\x8d\xb5\x0f\x47\xdc\x38\xba\x90\x8a\x0d\x80"
      "\x86\x87\xe4\x78\xa6\x09\xfe\x0d\xaa\x02\xd4\xe9\xc6\x18\xb9\x92\x66\xe7"
      "\xf2\xe9\x85\x97\xe2\x81\x3e\x1d\xba\x9c\x3c\x16\xe9\xfa\xb3\xbd\xa6\xed"
      "\x33\xcb\x1c\x75\x51\x3e\x22\x64\xb6\x9d\x47\x2d\xd0\xe1\x33\x86\x88\xba"
      "\x78\x2b\x41\xbd\xe1\x41\xf9\x9c\x48\x94\xde\xd9\x8e\xff\x9a\xa5\x3d\x22"
      "\xeb\x77\xc9\xd9\x31\x69\xc0\x4a\xb2\x49\x0b\xf2\x81\x06\xf7\x70\xe0\x7e"
      "\xb7\xa9\xe8\x7d\xde\x71\x82\x9f\x91\x8b\x98\xc4\xcb\xfc\xb1\x1a\x90\x13"
      "\x92\x64\xa9\xee\x80\x81\x97\x31\x67\xf4\x93\x76\x02\x78\xdf\x0c\xc3\x4b"
      "\xe9\xe8\xf8\x6f\x94\x8d\x9a\x62\xe6\x3a\xd6\xca\x9d\x21\x95\xff\x9c\x63"
      "\x20\xc8\x5b\xdd\xc4\x29\x15\x07\x00\x00\x00\x00\x00\x00\x00\x21\x95\xa3"
      "\xd6\x4e\x04\xc9\xec\xd1\xc3\x13\xc0\x8e\x29\xb8\x14\xbd\x8f\xed\x1a\xb6"
      "\xd2\x84\x6c\x73\x34\x59\x62\x89\x5d\x28\x9a\xc7\x71\x52\xca\xc2\xe0\xe3"
      "\x2b\x75\xce\x81\x47\x31\xc5\x42\x09\x1f\x21\x8d\xd1\xe6\x8a\x15\xd3\x4c"
      "\xa7\xa8\x19\xc8\x5e\x80\x05\x55\xdb\x64\xa7\x17\xeb\x23\xa8\x11\x35\x6d"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
      1024);
  syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x4b72,
          /*arg=*/0x200000000080ul);
  //  syz_usb_disconnect arguments: [
  //    fd: fd_usb (resource)
  //  ]
  syz_usb_disconnect(/*fd=*/r[0]);
  //  syz_usb_connect$hid arguments: [
  //    speed: usb_device_speed = 0x3 (8 bytes)
  //    dev_len: len = 0x36 (8 bytes)
  //    dev: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {12 01 10 01 00 00 00 40 58 04 03 50} (length
  //          0xc)
  //        }
  //      }
  //    }
  //    conn_descs: nil
  //  ]
  //  returns fd_usb_hid
  memcpy((void*)0x200000000000,
         "\x12\x01\x10\x01\x00\x00\x00\x40\x58\x04\x03\x50", 12);
  res = -1;
  res = syz_usb_connect(/*speed=USB_SPEED_HIGH*/ 3, /*dev_len=*/0x36,
                        /*dev=*/0x200000000000, /*conn_descs=*/0);
  if (res != -1)
    r[1] = res;
  //  syz_usb_control_io$hid arguments: [
  //    fd: fd_usb_hid (resource)
  //    descs: nil
  //    resps: nil
  //  ]
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  //  syz_usb_control_io$hid arguments: [
  //    fd: fd_usb_hid (resource)
  //    descs: nil
  //    resps: nil
  //  ]
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  //  syz_usb_control_io arguments: [
  //    fd: fd_usb (resource)
  //    descs: nil
  //    resps: nil
  //  ]
  syz_usb_control_io(/*fd=*/r[0], /*descs=*/0, /*resps=*/0);
  //  syz_usb_ep_write arguments: [
  //    fd: fd_usb (resource)
  //    ep: int8 = 0x81 (1 bytes)
  //    len: len = 0xffffffffffffff6d (8 bytes)
  //    data: ptr[in, buffer] {
  //      buffer: {01 9a 18 37 0c fb 66 1b a0 8c 22 8c e6 ca 19 b6 a9 9a 07 1c
  //      a3 4c 72 c8 91 f8 a2 60 fa 00 00 00 80 97 7d ae 8d 64 a3 0e 92 cd 51
  //      11 7c 4a 71 e2 65 18 e8 04 c0 00 58 e6 c7 c0 c3 63 02 72 51 66 8b b6
  //      50 d9 00 00 00 00 00} (length 0x49)
  //    }
  //  ]
  memcpy((void*)0x200000000100,
         "\x01\x9a\x18\x37\x0c\xfb\x66\x1b\xa0\x8c\x22\x8c\xe6\xca\x19\xb6\xa9"
         "\x9a\x07\x1c\xa3\x4c\x72\xc8\x91\xf8\xa2\x60\xfa\x00\x00\x00\x80\x97"
         "\x7d\xae\x8d\x64\xa3\x0e\x92\xcd\x51\x11\x7c\x4a\x71\xe2\x65\x18\xe8"
         "\x04\xc0\x00\x58\xe6\xc7\xc0\xc3\x63\x02\x72\x51\x66\x8b\xb6\x50\xd9"
         "\x00\x00\x00\x00\x00",
         73);
  syz_usb_ep_write(/*fd=*/r[0], /*ep=*/0x81, /*len=*/0xffffffffffffff6d,
                   /*data=*/0x200000000100);
  return 0;
}