// https://syzkaller.appspot.com/bug?id=08464f20fabc41f9298b4684912a54eff25a0fec
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.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/usb/ch9.h>

static 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 void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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;
}

#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;
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int 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");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/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", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  memcpy((void*)0x20000000,
         "\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=*/0x20000000,
                        /*conn_descs=*/0);
  if (res != -1)
    r[0] = res;
  syz_usb_control_io(/*fd=*/r[0], /*descs=*/0, /*resps=*/0);
  *(uint32_t*)0x200000c0 = 0x2c;
  *(uint64_t*)0x200000c4 = 0x20000100;
  memcpy((void*)0x20000100, "\x00\x00\x02", 3);
  *(uint64_t*)0x200000cc = 0;
  *(uint64_t*)0x200000d4 = 0;
  *(uint64_t*)0x200000dc = 0;
  *(uint64_t*)0x200000e4 = 0;
  syz_usb_control_io(/*fd=*/r[0], /*descs=*/0x200000c0, /*resps=*/0);
  *(uint8_t*)0x20000600 = 0x12;
  *(uint8_t*)0x20000601 = 1;
  *(uint16_t*)0x20000602 = 0;
  *(uint8_t*)0x20000604 = 0x1d;
  *(uint8_t*)0x20000605 = 0x91;
  *(uint8_t*)0x20000606 = 0x67;
  *(uint8_t*)0x20000607 = 0x20;
  *(uint16_t*)0x20000608 = 0x174f;
  *(uint16_t*)0x2000060a = 0x6a31;
  *(uint16_t*)0x2000060c = 0x263f;
  *(uint8_t*)0x2000060e = 1;
  *(uint8_t*)0x2000060f = 2;
  *(uint8_t*)0x20000610 = 3;
  *(uint8_t*)0x20000611 = 1;
  *(uint8_t*)0x20000612 = 9;
  *(uint8_t*)0x20000613 = 2;
  *(uint16_t*)0x20000614 = 0x12;
  *(uint8_t*)0x20000616 = 1;
  *(uint8_t*)0x20000617 = 0;
  *(uint8_t*)0x20000618 = 0;
  *(uint8_t*)0x20000619 = 0;
  *(uint8_t*)0x2000061a = 0;
  *(uint8_t*)0x2000061b = 9;
  *(uint8_t*)0x2000061c = 4;
  *(uint8_t*)0x2000061d = 0;
  *(uint8_t*)0x2000061e = 0;
  *(uint8_t*)0x2000061f = 0;
  *(uint8_t*)0x20000620 = 0x83;
  *(uint8_t*)0x20000621 = 0x3c;
  *(uint8_t*)0x20000622 = 0x8f;
  *(uint8_t*)0x20000623 = 0;
  res = -1;
  res = syz_usb_connect(/*speed=*/0, /*dev_len=*/0x24, /*dev=*/0x20000600,
                        /*conn_descs=*/0);
  if (res != -1)
    r[1] = res;
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  syz_usb_connect(/*speed=USB_SPEED_FULL*/ 2, /*dev_len=*/0x2d, /*dev=*/0,
                  /*conn_descs=*/0);
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  syz_usb_control_io(/*fd=*/-1, /*descs=*/0, /*resps=*/0);
  syz_usb_control_io(/*fd=*/-1, /*descs=*/0, /*resps=*/0);
  *(uint8_t*)0x200003c0 = 0x12;
  *(uint8_t*)0x200003c1 = 1;
  *(uint16_t*)0x200003c2 = 0;
  *(uint8_t*)0x200003c4 = 0;
  *(uint8_t*)0x200003c5 = 0;
  *(uint8_t*)0x200003c6 = 0;
  *(uint8_t*)0x200003c7 = 0x9f;
  *(uint16_t*)0x200003c8 = 0x1d6b;
  *(uint16_t*)0x200003ca = 0x101;
  *(uint16_t*)0x200003cc = 0x40;
  *(uint8_t*)0x200003ce = 1;
  *(uint8_t*)0x200003cf = 2;
  *(uint8_t*)0x200003d0 = 3;
  *(uint8_t*)0x200003d1 = 1;
  *(uint8_t*)0x200003d2 = 9;
  *(uint8_t*)0x200003d3 = 2;
  *(uint16_t*)0x200003d4 = 0x5f;
  *(uint8_t*)0x200003d6 = 3;
  *(uint8_t*)0x200003d7 = 1;
  *(uint8_t*)0x200003d8 = 0xb;
  *(uint8_t*)0x200003d9 = 0;
  *(uint8_t*)0x200003da = 2;
  *(uint8_t*)0x200003db = 9;
  *(uint8_t*)0x200003dc = 4;
  *(uint8_t*)0x200003dd = 0;
  *(uint8_t*)0x200003de = 0;
  *(uint8_t*)0x200003df = 0;
  *(uint8_t*)0x200003e0 = 1;
  *(uint8_t*)0x200003e1 = 1;
  *(uint8_t*)0x200003e2 = 0;
  *(uint8_t*)0x200003e3 = 0;
  *(uint8_t*)0x200003e4 = 0xa;
  *(uint8_t*)0x200003e5 = 0x24;
  *(uint8_t*)0x200003e6 = 1;
  *(uint16_t*)0x200003e7 = 0xe0;
  *(uint8_t*)0x200003e9 = 6;
  *(uint8_t*)0x200003ea = 2;
  *(uint8_t*)0x200003eb = 1;
  *(uint8_t*)0x200003ec = 2;
  *(uint8_t*)0x200003ed = 9;
  *(uint8_t*)0x200003ee = 4;
  *(uint8_t*)0x200003ef = 1;
  *(uint8_t*)0x200003f0 = 0;
  *(uint8_t*)0x200003f1 = 0;
  *(uint8_t*)0x200003f2 = 1;
  *(uint8_t*)0x200003f3 = 2;
  *(uint8_t*)0x200003f4 = 0;
  *(uint8_t*)0x200003f5 = 0;
  *(uint8_t*)0x200003f6 = 9;
  *(uint8_t*)0x200003f7 = 4;
  *(uint8_t*)0x200003f8 = 1;
  *(uint8_t*)0x200003f9 = 1;
  *(uint8_t*)0x200003fa = 1;
  *(uint8_t*)0x200003fb = 1;
  *(uint8_t*)0x200003fc = 2;
  *(uint8_t*)0x200003fd = 0;
  *(uint8_t*)0x200003fe = 0;
  *(uint8_t*)0x200003ff = 9;
  *(uint8_t*)0x20000400 = 5;
  *(uint8_t*)0x20000401 = 1;
  *(uint8_t*)0x20000402 = 9;
  *(uint16_t*)0x20000403 = 8;
  *(uint8_t*)0x20000405 = 0;
  *(uint8_t*)0x20000406 = 0x68;
  *(uint8_t*)0x20000407 = 0x40;
  *(uint8_t*)0x20000408 = 7;
  *(uint8_t*)0x20000409 = 0x25;
  *(uint8_t*)0x2000040a = 1;
  *(uint8_t*)0x2000040b = 2;
  *(uint8_t*)0x2000040c = 1;
  *(uint16_t*)0x2000040d = 8;
  *(uint8_t*)0x2000040f = 9;
  *(uint8_t*)0x20000410 = 4;
  *(uint8_t*)0x20000411 = 2;
  *(uint8_t*)0x20000412 = 0;
  *(uint8_t*)0x20000413 = 0;
  *(uint8_t*)0x20000414 = 1;
  *(uint8_t*)0x20000415 = 2;
  *(uint8_t*)0x20000416 = 0;
  *(uint8_t*)0x20000417 = 0;
  *(uint8_t*)0x20000418 = 9;
  *(uint8_t*)0x20000419 = 4;
  *(uint8_t*)0x2000041a = 2;
  *(uint8_t*)0x2000041b = 1;
  *(uint8_t*)0x2000041c = 1;
  *(uint8_t*)0x2000041d = 1;
  *(uint8_t*)0x2000041e = 2;
  *(uint8_t*)0x2000041f = 0;
  *(uint8_t*)0x20000420 = 0;
  *(uint8_t*)0x20000421 = 9;
  *(uint8_t*)0x20000422 = 5;
  *(uint8_t*)0x20000423 = 0x82;
  *(uint8_t*)0x20000424 = 9;
  *(uint16_t*)0x20000425 = 0x400;
  *(uint8_t*)0x20000427 = 6;
  *(uint8_t*)0x20000428 = 6;
  *(uint8_t*)0x20000429 = 5;
  *(uint8_t*)0x2000042a = 7;
  *(uint8_t*)0x2000042b = 0x25;
  *(uint8_t*)0x2000042c = 1;
  *(uint8_t*)0x2000042d = 1;
  *(uint8_t*)0x2000042e = 3;
  *(uint16_t*)0x2000042f = 0x5c;
  *(uint32_t*)0x20000180 = 0;
  *(uint64_t*)0x20000184 = 0;
  *(uint32_t*)0x2000018c = 0x1f6;
  *(uint64_t*)0x20000190 = 0x200008c0;
  *(uint8_t*)0x200008c0 = 5;
  *(uint8_t*)0x200008c1 = 0xf;
  *(uint16_t*)0x200008c2 = 0x1f6;
  *(uint8_t*)0x200008c4 = 6;
  *(uint8_t*)0x200008c5 = 7;
  *(uint8_t*)0x200008c6 = 0x10;
  *(uint8_t*)0x200008c7 = 2;
  STORE_BY_BITMASK(uint32_t, , 0x200008c8, 6, 0, 8);
  STORE_BY_BITMASK(uint32_t, , 0x200008c9, 7, 0, 4);
  STORE_BY_BITMASK(uint32_t, , 0x200008c9, 0, 4, 4);
  STORE_BY_BITMASK(uint32_t, , 0x200008ca, 6, 0, 16);
  *(uint8_t*)0x200008cc = 0x14;
  *(uint8_t*)0x200008cd = 0x10;
  *(uint8_t*)0x200008ce = 4;
  *(uint8_t*)0x200008cf = 1;
  memcpy((void*)0x200008d0,
         "\x8f\xf5\xb9\x2c\x3e\x8b\x7e\x54\xa2\x69\x48\x8c\x0a\x31\x9a\xee",
         16);
  *(uint8_t*)0x200008e0 = 3;
  *(uint8_t*)0x200008e1 = 0x10;
  *(uint8_t*)0x200008e2 = 0xb;
  *(uint8_t*)0x200008e3 = 0xed;
  *(uint8_t*)0x200008e4 = 0x10;
  *(uint8_t*)0x200008e5 = 0xa;
  memcpy((void*)0x200008e6,
         "\x0e\x69\x91\x76\x75\x0f\xe3\x69\xf9\x7b\xd4\xdd\xd3\xae\xa0\xc8\xc6"
         "\x3f\x5c\xa3\xf3\xee\x06\xc8\x56\xba\x77\x89\x2b\xc9\xd6\xd2\x9d\xc2"
         "\xe8\x7a\x92\xcd\xf2\xaf\x31\xf9\xd0\xf0\xfd\x36\x3c\x82\xf4\xc0\xd3"
         "\x5c\xb3\xac\xab\x21\x3b\x84\xe2\x0a\xee\x4d\xa1\x3a\x2a\x62\xe3\x73"
         "\x91\x0b\x14\x2a\xc2\x6b\x55\x2a\x03\x86\x83\x90\xba\xab\x54\x50\x8e"
         "\x0f\x51\x7b\xeb\x8e\x4a\x58\x62\xf0\x57\xbc\xb2\x47\x7c\x35\x76\xb3"
         "\xba\xd6\x96\x9b\xc7\x9a\xe0\x0a\xbf\x0c\xc7\x8b\xeb\xb6\xeb\x4f\x03"
         "\xbb\x41\x83\xc7\x4f\x8b\x10\x48\x7f\xc9\x95\x81\xda\xf1\x82\x0d\x2f"
         "\x1c\x12\xa5\x2d\xde\xec\xab\x38\x0c\x26\x5f\xc7\x4d\x93\x1e\xe9\xe2"
         "\x8f\x23\x34\xcc\x53\xe0\x95\x90\x3f\x68\x92\x2a\x74\x1c\x70\x34\xb1"
         "\x9d\x8b\x88\xa0\x9c\x88\x24\xfe\x2c\xb7\x94\x15\x59\x2f\xa1\x77\x59"
         "\x51\x82\x83\xd9\xa5\xdd\x4b\xf3\x5e\x5d\x93\x21\x31\x49\x69\xeb\xfd"
         "\x94\xa9\xc9\xe2\x4f\x9b\xc8\xbf\xe3\x58\x58\x3c\xec\xc8\x6c\xa5\x6c"
         "\x9d\xb4\x16\x20\x22\xee\x1a\x3f\x01\x3c\x96\xa2\x50",
         234);
  *(uint8_t*)0x200009d0 = 0x14;
  *(uint8_t*)0x200009d1 = 0x10;
  *(uint8_t*)0x200009d2 = 0xa;
  *(uint8_t*)0x200009d3 = 5;
  STORE_BY_BITMASK(uint32_t, , 0x200009d4, 2, 0, 5);
  STORE_BY_BITMASK(uint32_t, , 0x200009d4, 3, 5, 27);
  *(uint16_t*)0x200009d8 = 0xf00;
  *(uint16_t*)0x200009da = 3;
  *(uint32_t*)0x200009dc = 0xff0000;
  *(uint32_t*)0x200009e0 = 0xc000;
  *(uint8_t*)0x200009e4 = 0xd2;
  *(uint8_t*)0x200009e5 = 0x10;
  *(uint8_t*)0x200009e6 = 0xa;
  memcpy(
      (void*)0x200009e7,
      "\xd0\x5a\x42\x80\xd5\xbe\xaf\xfe\xb5\x59\x27\x16\x5f\x3f\x47\xcc\xe1\x87"
      "\x81\xfb\x3b\xe5\x39\x36\xdb\x6a\x16\x5a\x89\xec\x16\xa0\x44\xe8\xa0\x74"
      "\xca\x0e\x6e\x5f\x17\xf2\xb0\x44\x9d\xca\x74\x02\x10\xb1\xa8\x96\x73\xe6"
      "\x86\x14\xe2\xc3\x08\x62\xf5\x80\x59\x07\x87\x5c\xe9\xd2\x21\x0d\xaf\xb2"
      "\x0e\x04\x83\x32\x87\xf2\xb8\x81\xfb\x4c\x55\x2b\x16\xd3\x22\x7b\xa2\xba"
      "\xd0\x19\x8b\xed\x4c\xb5\xfa\x31\x9b\x81\x4e\xb9\xf8\xda\x0e\x92\x27\xd0"
      "\xf2\x32\x30\xa4\x80\x84\x46\x8a\xfa\xa7\x41\x2a\xb7\xab\x5b\x45\x8b\x33"
      "\xff\xde\xec\xaf\xe6\x89\xe2\x1d\xf5\x12\x53\x26\xa1\xc0\x90\x28\xc2\xa0"
      "\xe1\x51\x6a\xad\x9c\x29\xce\x6b\xfb\x09\x51\x9e\xde\x7d\x4f\x70\xbe\x30"
      "\x6b\xe9\xf0\x6a\x22\x44\x38\x93\x78\xd2\xae\x1d\xc0\x21\xed\x0e\x01\x98"
      "\x25\xcd\x3e\xe7\xea\x01\x7c\x4b\x18\x36\xdf\x47\x98\x04\xff\x54\x67\x10"
      "\xb6\x85\xc6\xd6\x45\x93\x62\x7e\xc1",
      207);
  *(uint32_t*)0x20000198 = 1;
  *(uint32_t*)0x2000019c = 4;
  *(uint64_t*)0x200001a0 = 0x20000140;
  *(uint8_t*)0x20000140 = 4;
  *(uint8_t*)0x20000141 = 3;
  *(uint16_t*)0x20000142 = 0x441;
  syz_usb_connect(/*speed=USB_SPEED_HIGH*/ 3, /*dev_len=*/0x71,
                  /*dev=*/0x200003c0, /*conn_descs=*/0x20000180);
  *(uint32_t*)0x20000340 = 0x44;
  *(uint64_t*)0x20000344 = 0;
  *(uint64_t*)0x2000034c = 0;
  *(uint64_t*)0x20000354 = 0;
  *(uint64_t*)0x2000035c = 0;
  *(uint64_t*)0x20000364 = 0;
  *(uint64_t*)0x2000036c = 0;
  *(uint64_t*)0x20000374 = 0;
  *(uint64_t*)0x2000037c = 0;
  syz_usb_control_io(/*fd=*/-1, /*descs=*/0, /*resps=*/0x20000340);
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  syz_usb_control_io(/*fd=*/r[1], /*descs=*/0, /*resps=*/0);
  memcpy(
      (void*)0x200002c0,
      "\xb9\x42\x5b\x44\x65\x1d\xd2\x32\x41\x96\x35\x99\x00\x00\x00\x11\x00\x00"
      "\x00\x4a\x16\x94\x1f\xf5\xf4\xb4\xf1\xf0\xad\xd7\xfc\xf2\xb8\x77\xfc\xea"
      "\xff\xff\xff\xff\xff\xf1\xff\xdf\x4c\xd9\xf5\xd3\x96\x98\x90\x52\x2c\x77"
      "\x15\x7d\x88\x01\x00\x00\x00\x3a\x5b\xd5\x53\x1d\x45\x9d\xff\xff\x03\x00"
      "\x00\x00\x00\x00\x91\xff\x00\x00\x00\xe8\xf5\xb3\x37\x1d\xa3\x63\x5b\x8b"
      "\x4f\xa6\x37\x13\x58\x00\x00\x1f\x65\xe4\xb4\x36\xaa\x9e\x50\xbc\x0f\x19"
      "\xb7\xd3\x37\x2f\xf9\xeb\xce\xde\x1f\xb5\xe9\x42\x8f\x54\xd5\xd1\xf0\xcc"
      "\x75\x2c\xf2\x46\xa5\xd2\xda\x34\xa5\xaa\x97\xdc\x14\xa4\x69\xc3\xdd\x3e"
      "\x26\xb4\x1c\x35\x64\x84\xe4\x6f\xd6\x6e\x3f\x2c\x78\x07\xe8\x77\x3e\xed"
      "\x7b\x94\xfa\x09\x9a\xb8\x4f\xea\xde\xc2\xea\x95\xf6\x5b\xba\x45\x2e\xae"
      "\x5b\x09\x00\xf9\x8a\x97\x9a\x88\xc5\x17\xa2\xdc\x36\x0a\x00\x23\x77\x23"
      "\xe2\xf4\x67\xaf\x70\x6e\xa1\x72\x26\x29\x6b\x3a\x10\xa3\x51\xcb\x47\xab"
      "\xa2\xc6\xb8\x36\xc9\x06\x79\xb4\xdd\x85\x9d\xdc\x9e\x48\x00\x44\x8a\xab"
      "\x00\x00\x00\x00\x00\x00\x0d\x75\xf3\x4b\xb5\x0d\x8d\x70\x84",
      249);
  syz_usb_ep_write(/*fd=*/r[0], /*ep=*/0x81, /*len=*/0xffffff75,
                   /*data=*/0x200002c0);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}