// https://syzkaller.appspot.com/bug?id=75881f189a08c999545a7defe34b420447902944
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/vhci.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

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

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

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

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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);
}

static void __attribute__((noinline)) remove_dir(const char* dir)
{
  DIR* dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EACCES) {
      if (rmdir(dir))
        exit(1);
      return;
    }
    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);
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    if (unlink(filename))
      exit(1);
  }
  closedir(dp);
  if (rmdir(dir))
    exit(1);
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  pthread_mutex_t mu;
  pthread_cond_t cv;
  int state;
} event_t;

static void event_init(event_t* ev)
{
  if (pthread_mutex_init(&ev->mu, 0))
    exit(1);
  if (pthread_cond_init(&ev->cv, 0))
    exit(1);
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  if (ev->state)
    exit(1);
  ev->state = 1;
  pthread_mutex_unlock(&ev->mu);
  pthread_cond_broadcast(&ev->cv);
}

static void event_wait(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  while (!ev->state)
    pthread_cond_wait(&ev->cv, &ev->mu);
  pthread_mutex_unlock(&ev->mu);
}

static int event_isset(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  pthread_mutex_lock(&ev->mu);
  for (;;) {
    if (ev->state)
      break;
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
    now = current_time_ms();
    if (now - start > timeout)
      break;
  }
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

struct usb_endpoint_descriptor {
  uint8_t bLength;
  uint8_t bDescriptorType;
  uint8_t bEndpointAddress;
  uint8_t bmAttributes;
  uint16_t wMaxPacketSize;
  uint8_t bInterval;
  uint8_t bRefresh;
  uint8_t bSynchAddress;
} __attribute__((packed));

struct usb_device_descriptor {
  uint8_t bLength;
  uint8_t bDescriptorType;
  uint16_t bcdUSB;
  uint8_t bDeviceClass;
  uint8_t bDeviceSubClass;
  uint8_t bDeviceProtocol;
  uint8_t bMaxPacketSize0;
  uint16_t idVendor;
  uint16_t idProduct;
  uint16_t bcdDevice;
  uint8_t iManufacturer;
  uint8_t iProduct;
  uint8_t iSerialNumber;
  uint8_t bNumConfigurations;
} __attribute__((packed));

struct usb_config_descriptor {
  uint8_t bLength;
  uint8_t bDescriptorType;
  uint16_t wTotalLength;
  uint8_t bNumInterfaces;
  uint8_t bConfigurationValue;
  uint8_t iConfiguration;
  uint8_t bmAttributes;
  uint8_t bMaxPower;
} __attribute__((packed));

struct usb_interface_descriptor {
  uint8_t bLength;
  uint8_t bDescriptorType;
  uint8_t bInterfaceNumber;
  uint8_t bAlternateSetting;
  uint8_t bNumEndpoints;
  uint8_t bInterfaceClass;
  uint8_t bInterfaceSubClass;
  uint8_t bInterfaceProtocol;
  uint8_t iInterface;
} __attribute__((packed));

struct usb_ctrlrequest {
  uint8_t bRequestType;
  uint8_t bRequest;
  uint16_t wValue;
  uint16_t wIndex;
  uint16_t wLength;
} __attribute__((packed));

struct usb_qualifier_descriptor {
  uint8_t bLength;
  uint8_t bDescriptorType;
  uint16_t bcdUSB;
  uint8_t bDeviceClass;
  uint8_t bDeviceSubClass;
  uint8_t bDeviceProtocol;
  uint8_t bMaxPacketSize0;
  uint8_t bNumConfigurations;
  uint8_t bRESERVED;
} __attribute__((packed));

#define USB_TYPE_MASK (0x03 << 5)
#define USB_TYPE_STANDARD (0x00 << 5)
#define USB_TYPE_CLASS (0x01 << 5)
#define USB_TYPE_VENDOR (0x02 << 5)
#define USB_TYPE_RESERVED (0x03 << 5)

#define USB_DT_DEVICE 0x01
#define USB_DT_CONFIG 0x02
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_DEVICE_QUALIFIER 0x06
#define USB_DT_OTHER_SPEED_CONFIG 0x07
#define USB_DT_INTERFACE_POWER 0x08
#define USB_DT_OTG 0x09
#define USB_DT_DEBUG 0x0a
#define USB_DT_INTERFACE_ASSOCIATION 0x0b
#define USB_DT_SECURITY 0x0c
#define USB_DT_KEY 0x0d
#define USB_DT_ENCRYPTION_TYPE 0x0e
#define USB_DT_BOS 0x0f
#define USB_DT_DEVICE_CAPABILITY 0x10
#define USB_DT_WIRELESS_ENDPOINT_COMP 0x11
#define USB_DT_WIRE_ADAPTER 0x21
#define USB_DT_RPIPE 0x22
#define USB_DT_CS_RADIO_CONTROL 0x23
#define USB_DT_PIPE_USAGE 0x24
#define USB_DT_SS_ENDPOINT_COMP 0x30
#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31

#define USB_REQ_GET_STATUS 0x00
#define USB_REQ_CLEAR_FEATURE 0x01
#define USB_REQ_SET_FEATURE 0x03
#define USB_REQ_SET_ADDRESS 0x05
#define USB_REQ_GET_DESCRIPTOR 0x06
#define USB_REQ_SET_DESCRIPTOR 0x07
#define USB_REQ_GET_CONFIGURATION 0x08
#define USB_REQ_SET_CONFIGURATION 0x09
#define USB_REQ_GET_INTERFACE 0x0A
#define USB_REQ_SET_INTERFACE 0x0B
#define USB_REQ_SYNCH_FRAME 0x0C
#define USB_REQ_SET_SEL 0x30
#define USB_REQ_SET_ISOCH_DELAY 0x31

#define USB_REQ_SET_ENCRYPTION 0x0D
#define USB_REQ_GET_ENCRYPTION 0x0E
#define USB_REQ_RPIPE_ABORT 0x0E
#define USB_REQ_SET_HANDSHAKE 0x0F
#define USB_REQ_RPIPE_RESET 0x0F
#define USB_REQ_GET_HANDSHAKE 0x10
#define USB_REQ_SET_CONNECTION 0x11
#define USB_REQ_SET_SECURITY_DATA 0x12
#define USB_REQ_GET_SECURITY_DATA 0x13
#define USB_REQ_SET_WUSB_DATA 0x14
#define USB_REQ_LOOPBACK_DATA_WRITE 0x15
#define USB_REQ_LOOPBACK_DATA_READ 0x16
#define USB_REQ_SET_INTERFACE_DS 0x17

#define USB_REQ_GET_PARTNER_PDO 20
#define USB_REQ_GET_BATTERY_STATUS 21
#define USB_REQ_SET_PDO 22
#define USB_REQ_GET_VDM 23
#define USB_REQ_SEND_VDM 24

#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 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;
}

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;
}

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,
                           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:
        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;
}

static int vhci_open(void)
{
  char path[1024];
  snprintf(path, sizeof(path), "/dev/vhci%llu", procid);
  return open(path, O_RDWR);
}

static int vhci_setport(int fd, u_int port)
{
  struct vhci_ioc_set_port args;
  args.port = port;
  return ioctl(fd, VHCI_IOC_SET_PORT, &args);
}

static int vhci_usb_attach(int fd)
{
  return ioctl(fd, VHCI_IOC_USB_ATTACH, NULL);
}

static int vhci_usb_recv(int fd, void* buf, size_t size)
{
  uint8_t* ptr = (uint8_t*)buf;
  while (1) {
    ssize_t done = read(fd, ptr, size);
    if (done < 0)
      return -1;
    if ((size_t)done == size)
      return 0;
    size -= done;
    ptr += done;
  }
}

static int vhci_usb_send(int fd, void* buf, size_t size)
{
  uint8_t* ptr = (uint8_t*)buf;
  while (1) {
    ssize_t done = write(fd, ptr, size);
    if (done <= 0)
      return -1;
    if ((size_t)done == size)
      return 0;
    size -= done;
    ptr += done;
  }
}

static volatile long
syz_usb_connect_impl(int fd, 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)
{
  struct usb_device_index* index = add_usb_index(fd, dev, dev_len);
  if (!index) {
    return -1;
  }
  if (vhci_setport(fd, 1))
    exit(1);
  if (vhci_usb_attach(fd)) {
    return -1;
  }
  bool done = false;
  while (!done) {
    vhci_request_t req;
    if (vhci_usb_recv(fd, &req, sizeof(req))) {
      return -1;
    }
    if (req.type != VHCI_REQ_CTRL) {
      return -1;
    }
    char* response_data = NULL;
    uint32_t response_length = 0;
    char data[4096];
    if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
      if (!lookup_connect_response_in(
              fd, descs, (const struct usb_ctrlrequest*)&req.u.ctrl,
              &response_data, &response_length)) {
        return -1;
      }
    } else {
      if (!lookup_connect_response_out(
              fd, descs, (const struct usb_ctrlrequest*)&req.u.ctrl, &done)) {
        return -1;
      }
      response_data = NULL;
      response_length = UGETW(req.u.ctrl.wLength);
    }
    if ((req.u.ctrl.bmRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD &&
        req.u.ctrl.bRequest == USB_REQ_SET_CONFIGURATION) {
    }
    if (response_length > sizeof(data))
      response_length = 0;
    if ((uint32_t)UGETW(req.u.ctrl.wLength) < response_length)
      response_length = UGETW(req.u.ctrl.wLength);
    if (response_data)
      memcpy(data, response_data, response_length);
    else
      memset(data, 0, response_length);
    int rv = 0;
    if (req.u.ctrl.bmRequestType & UE_DIR_IN) {
      if (response_length > 0) {
        vhci_response_t res;
        res.size = response_length;
        rv = vhci_usb_send(fd, &res, sizeof(res));
        if (rv == 0)
          rv = vhci_usb_send(fd, data, response_length);
      }
    } else {
      rv = vhci_usb_recv(fd, data, response_length);
    }
    if (rv < 0) {
      return -1;
    }
  }
  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;
  if (!dev) {
    return -1;
  }
  int fd = vhci_open();
  if (fd < 0)
    exit(1);
  long res = syz_usb_connect_impl(fd, speed, dev_len, dev, descs,
                                  &lookup_connect_response_out_generic);
  close(fd);
  return res;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 3; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 50 + (call == 0 ? 3000 : 0) +
                                     (call == 1 ? 3000 : 0) +
                                     (call == 2 ? 3000 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS 0

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);
      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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

#ifndef SYS_mmap
#define SYS_mmap 197
#endif

void execute_call(int call)
{
  switch (call) {
  case 0:
    NONFAILING(*(uint8_t*)0x20000140 = 0x12);
    NONFAILING(*(uint8_t*)0x20000141 = 1);
    NONFAILING(*(uint16_t*)0x20000142 = 0);
    NONFAILING(*(uint8_t*)0x20000144 = 0xd6);
    NONFAILING(*(uint8_t*)0x20000145 = 0x82);
    NONFAILING(*(uint8_t*)0x20000146 = 9);
    NONFAILING(*(uint8_t*)0x20000147 = 0x40);
    NONFAILING(*(uint16_t*)0x20000148 = 0xa5c);
    NONFAILING(*(uint16_t*)0x2000014a = 0x2033);
    NONFAILING(*(uint16_t*)0x2000014c = 0xbaf3);
    NONFAILING(*(uint8_t*)0x2000014e = 0);
    NONFAILING(*(uint8_t*)0x2000014f = 0);
    NONFAILING(*(uint8_t*)0x20000150 = 0);
    NONFAILING(*(uint8_t*)0x20000151 = 1);
    NONFAILING(*(uint8_t*)0x20000152 = 9);
    NONFAILING(*(uint8_t*)0x20000153 = 2);
    NONFAILING(*(uint16_t*)0x20000154 = 0x12);
    NONFAILING(*(uint8_t*)0x20000156 = 1);
    NONFAILING(*(uint8_t*)0x20000157 = 0);
    NONFAILING(*(uint8_t*)0x20000158 = 0);
    NONFAILING(*(uint8_t*)0x20000159 = 0);
    NONFAILING(*(uint8_t*)0x2000015a = 0);
    NONFAILING(*(uint8_t*)0x2000015b = 9);
    NONFAILING(*(uint8_t*)0x2000015c = 4);
    NONFAILING(*(uint8_t*)0x2000015d = 0xde);
    NONFAILING(*(uint8_t*)0x2000015e = 0);
    NONFAILING(*(uint8_t*)0x2000015f = 0);
    NONFAILING(*(uint8_t*)0x20000160 = 0x79);
    NONFAILING(*(uint8_t*)0x20000161 = 0x21);
    NONFAILING(*(uint8_t*)0x20000162 = 0xc9);
    NONFAILING(*(uint8_t*)0x20000163 = 0);
    NONFAILING(syz_usb_connect(0, 0x24, 0x20000140, 0));
    break;
  case 1:
    NONFAILING(*(uint8_t*)0x20000000 = 0x12);
    NONFAILING(*(uint8_t*)0x20000001 = 1);
    NONFAILING(*(uint16_t*)0x20000002 = 0x250);
    NONFAILING(*(uint8_t*)0x20000004 = 0);
    NONFAILING(*(uint8_t*)0x20000005 = 0);
    NONFAILING(*(uint8_t*)0x20000006 = 0);
    NONFAILING(*(uint8_t*)0x20000007 = 0x58);
    NONFAILING(*(uint16_t*)0x20000008 = 0x1d6b);
    NONFAILING(*(uint16_t*)0x2000000a = 0x101);
    NONFAILING(*(uint16_t*)0x2000000c = 0x40);
    NONFAILING(*(uint8_t*)0x2000000e = 1);
    NONFAILING(*(uint8_t*)0x2000000f = 2);
    NONFAILING(*(uint8_t*)0x20000010 = 3);
    NONFAILING(*(uint8_t*)0x20000011 = 1);
    NONFAILING(*(uint8_t*)0x20000012 = 9);
    NONFAILING(*(uint8_t*)0x20000013 = 2);
    NONFAILING(*(uint16_t*)0x20000014 = 0x9c);
    NONFAILING(*(uint8_t*)0x20000016 = 3);
    NONFAILING(*(uint8_t*)0x20000017 = 1);
    NONFAILING(*(uint8_t*)0x20000018 = 2);
    NONFAILING(*(uint8_t*)0x20000019 = 0x30);
    NONFAILING(*(uint8_t*)0x2000001a = 0x20);
    NONFAILING(*(uint8_t*)0x2000001b = 9);
    NONFAILING(*(uint8_t*)0x2000001c = 4);
    NONFAILING(*(uint8_t*)0x2000001d = 0);
    NONFAILING(*(uint8_t*)0x2000001e = 0);
    NONFAILING(*(uint8_t*)0x2000001f = 0);
    NONFAILING(*(uint8_t*)0x20000020 = 1);
    NONFAILING(*(uint8_t*)0x20000021 = 1);
    NONFAILING(*(uint8_t*)0x20000022 = 0);
    NONFAILING(*(uint8_t*)0x20000023 = 0);
    NONFAILING(*(uint8_t*)0x20000024 = 0xa);
    NONFAILING(*(uint8_t*)0x20000025 = 0x24);
    NONFAILING(*(uint8_t*)0x20000026 = 1);
    NONFAILING(*(uint16_t*)0x20000027 = 0xa2);
    NONFAILING(*(uint8_t*)0x20000029 = 4);
    NONFAILING(*(uint8_t*)0x2000002a = 2);
    NONFAILING(*(uint8_t*)0x2000002b = 1);
    NONFAILING(*(uint8_t*)0x2000002c = 2);
    NONFAILING(*(uint8_t*)0x2000002d = 0xc);
    NONFAILING(*(uint8_t*)0x2000002e = 0x24);
    NONFAILING(*(uint8_t*)0x2000002f = 2);
    NONFAILING(*(uint8_t*)0x20000030 = 1);
    NONFAILING(*(uint16_t*)0x20000031 = 0x203);
    NONFAILING(*(uint8_t*)0x20000033 = 6);
    NONFAILING(*(uint8_t*)0x20000034 = 0);
    NONFAILING(*(uint16_t*)0x20000035 = 0x3e);
    NONFAILING(*(uint8_t*)0x20000037 = 0xeb);
    NONFAILING(*(uint8_t*)0x20000038 = 5);
    NONFAILING(*(uint8_t*)0x20000039 = 0xc);
    NONFAILING(*(uint8_t*)0x2000003a = 0x24);
    NONFAILING(*(uint8_t*)0x2000003b = 2);
    NONFAILING(*(uint8_t*)0x2000003c = 1);
    NONFAILING(*(uint16_t*)0x2000003d = 0x200);
    NONFAILING(*(uint8_t*)0x2000003f = 1);
    NONFAILING(*(uint8_t*)0x20000040 = 5);
    NONFAILING(*(uint16_t*)0x20000041 = 0xd0);
    NONFAILING(*(uint8_t*)0x20000043 = 3);
    NONFAILING(*(uint8_t*)0x20000044 = 0x3f);
    NONFAILING(*(uint8_t*)0x20000045 = 5);
    NONFAILING(*(uint8_t*)0x20000046 = 0x24);
    NONFAILING(*(uint8_t*)0x20000047 = 5);
    NONFAILING(*(uint8_t*)0x20000048 = 3);
    NONFAILING(*(uint8_t*)0x20000049 = -1);
    NONFAILING(*(uint8_t*)0x2000004a = 9);
    NONFAILING(*(uint8_t*)0x2000004b = 4);
    NONFAILING(*(uint8_t*)0x2000004c = 1);
    NONFAILING(*(uint8_t*)0x2000004d = 0);
    NONFAILING(*(uint8_t*)0x2000004e = 0);
    NONFAILING(*(uint8_t*)0x2000004f = 1);
    NONFAILING(*(uint8_t*)0x20000050 = 2);
    NONFAILING(*(uint8_t*)0x20000051 = 0);
    NONFAILING(*(uint8_t*)0x20000052 = 0);
    NONFAILING(*(uint8_t*)0x20000053 = 9);
    NONFAILING(*(uint8_t*)0x20000054 = 4);
    NONFAILING(*(uint8_t*)0x20000055 = 1);
    NONFAILING(*(uint8_t*)0x20000056 = 1);
    NONFAILING(*(uint8_t*)0x20000057 = 1);
    NONFAILING(*(uint8_t*)0x20000058 = 1);
    NONFAILING(*(uint8_t*)0x20000059 = 2);
    NONFAILING(*(uint8_t*)0x2000005a = 0);
    NONFAILING(*(uint8_t*)0x2000005b = 0);
    NONFAILING(*(uint8_t*)0x2000005c = 7);
    NONFAILING(*(uint8_t*)0x2000005d = 0x24);
    NONFAILING(*(uint8_t*)0x2000005e = 1);
    NONFAILING(*(uint8_t*)0x2000005f = 6);
    NONFAILING(*(uint8_t*)0x20000060 = 0x71);
    NONFAILING(*(uint16_t*)0x20000061 = 1);
    NONFAILING(*(uint8_t*)0x20000063 = 8);
    NONFAILING(*(uint8_t*)0x20000064 = 0x24);
    NONFAILING(*(uint8_t*)0x20000065 = 2);
    NONFAILING(*(uint8_t*)0x20000066 = 1);
    NONFAILING(*(uint8_t*)0x20000067 = 8);
    NONFAILING(*(uint8_t*)0x20000068 = 4);
    NONFAILING(*(uint8_t*)0x20000069 = 0x2d);
    NONFAILING(*(uint8_t*)0x2000006a = 0x20);
    NONFAILING(*(uint8_t*)0x2000006b = 9);
    NONFAILING(*(uint8_t*)0x2000006c = 0x24);
    NONFAILING(*(uint8_t*)0x2000006d = 2);
    NONFAILING(*(uint8_t*)0x2000006e = 2);
    NONFAILING(*(uint16_t*)0x2000006f = -1);
    NONFAILING(*(uint16_t*)0x20000071 = 5);
    NONFAILING(*(uint8_t*)0x20000073 = 0);
    NONFAILING(*(uint8_t*)0x20000074 = 8);
    NONFAILING(*(uint8_t*)0x20000075 = 0x24);
    NONFAILING(*(uint8_t*)0x20000076 = 2);
    NONFAILING(*(uint8_t*)0x20000077 = 1);
    NONFAILING(*(uint8_t*)0x20000078 = 0);
    NONFAILING(*(uint8_t*)0x20000079 = 3);
    NONFAILING(*(uint8_t*)0x2000007a = 2);
    NONFAILING(*(uint8_t*)0x2000007b = 0);
    NONFAILING(*(uint8_t*)0x2000007c = 9);
    NONFAILING(*(uint8_t*)0x2000007d = 5);
    NONFAILING(*(uint8_t*)0x2000007e = 1);
    NONFAILING(*(uint8_t*)0x2000007f = 9);
    NONFAILING(*(uint16_t*)0x20000080 = 0x200);
    NONFAILING(*(uint8_t*)0x20000082 = 4);
    NONFAILING(*(uint8_t*)0x20000083 = 0x80);
    NONFAILING(*(uint8_t*)0x20000084 = 0xc4);
    NONFAILING(*(uint8_t*)0x20000085 = 7);
    NONFAILING(*(uint8_t*)0x20000086 = 0x25);
    NONFAILING(*(uint8_t*)0x20000087 = 1);
    NONFAILING(*(uint8_t*)0x20000088 = 0);
    NONFAILING(*(uint8_t*)0x20000089 = 7);
    NONFAILING(*(uint16_t*)0x2000008a = 0x33);
    NONFAILING(*(uint8_t*)0x2000008c = 9);
    NONFAILING(*(uint8_t*)0x2000008d = 4);
    NONFAILING(*(uint8_t*)0x2000008e = 2);
    NONFAILING(*(uint8_t*)0x2000008f = 0);
    NONFAILING(*(uint8_t*)0x20000090 = 0);
    NONFAILING(*(uint8_t*)0x20000091 = 1);
    NONFAILING(*(uint8_t*)0x20000092 = 2);
    NONFAILING(*(uint8_t*)0x20000093 = 0);
    NONFAILING(*(uint8_t*)0x20000094 = 0);
    NONFAILING(*(uint8_t*)0x20000095 = 9);
    NONFAILING(*(uint8_t*)0x20000096 = 4);
    NONFAILING(*(uint8_t*)0x20000097 = 2);
    NONFAILING(*(uint8_t*)0x20000098 = 1);
    NONFAILING(*(uint8_t*)0x20000099 = 1);
    NONFAILING(*(uint8_t*)0x2000009a = 1);
    NONFAILING(*(uint8_t*)0x2000009b = 2);
    NONFAILING(*(uint8_t*)0x2000009c = 0);
    NONFAILING(*(uint8_t*)0x2000009d = 0);
    NONFAILING(*(uint8_t*)0x2000009e = 9);
    NONFAILING(*(uint8_t*)0x2000009f = 5);
    NONFAILING(*(uint8_t*)0x200000a0 = 0x82);
    NONFAILING(*(uint8_t*)0x200000a1 = 9);
    NONFAILING(*(uint16_t*)0x200000a2 = 0x40);
    NONFAILING(*(uint8_t*)0x200000a4 = 8);
    NONFAILING(*(uint8_t*)0x200000a5 = 0x80);
    NONFAILING(*(uint8_t*)0x200000a6 = 6);
    NONFAILING(*(uint8_t*)0x200000a7 = 7);
    NONFAILING(*(uint8_t*)0x200000a8 = 0x25);
    NONFAILING(*(uint8_t*)0x200000a9 = 1);
    NONFAILING(*(uint8_t*)0x200000aa = 1);
    NONFAILING(*(uint8_t*)0x200000ab = 6);
    NONFAILING(*(uint16_t*)0x200000ac = 0x1000);
    NONFAILING(syz_usb_connect(4, 0xae, 0x20000000, 0));
    break;
  case 2:
    NONFAILING(*(uint8_t*)0x20000300 = 0x12);
    NONFAILING(*(uint8_t*)0x20000301 = 1);
    NONFAILING(*(uint16_t*)0x20000302 = 0x110);
    NONFAILING(*(uint8_t*)0x20000304 = 2);
    NONFAILING(*(uint8_t*)0x20000305 = 0);
    NONFAILING(*(uint8_t*)0x20000306 = 0);
    NONFAILING(*(uint8_t*)0x20000307 = 8);
    NONFAILING(*(uint16_t*)0x20000308 = 0x525);
    NONFAILING(*(uint16_t*)0x2000030a = 0xa4a1);
    NONFAILING(*(uint16_t*)0x2000030c = 0x40);
    NONFAILING(*(uint8_t*)0x2000030e = 1);
    NONFAILING(*(uint8_t*)0x2000030f = 2);
    NONFAILING(*(uint8_t*)0x20000310 = 3);
    NONFAILING(*(uint8_t*)0x20000311 = 1);
    NONFAILING(*(uint8_t*)0x20000312 = 9);
    NONFAILING(*(uint8_t*)0x20000313 = 2);
    NONFAILING(*(uint16_t*)0x20000314 = 0x87);
    NONFAILING(*(uint8_t*)0x20000316 = 2);
    NONFAILING(*(uint8_t*)0x20000317 = 1);
    NONFAILING(*(uint8_t*)0x20000318 = 7);
    NONFAILING(*(uint8_t*)0x20000319 = 0x10);
    NONFAILING(*(uint8_t*)0x2000031a = -1);
    NONFAILING(*(uint8_t*)0x2000031b = 9);
    NONFAILING(*(uint8_t*)0x2000031c = 4);
    NONFAILING(*(uint8_t*)0x2000031d = 0);
    NONFAILING(*(uint8_t*)0x2000031e = 0);
    NONFAILING(*(uint8_t*)0x2000031f = 1);
    NONFAILING(*(uint8_t*)0x20000320 = 2);
    NONFAILING(*(uint8_t*)0x20000321 = 0xd);
    NONFAILING(*(uint8_t*)0x20000322 = 0);
    NONFAILING(*(uint8_t*)0x20000323 = 0);
    NONFAILING(*(uint8_t*)0x20000324 = 5);
    NONFAILING(*(uint8_t*)0x20000325 = 0x24);
    NONFAILING(*(uint8_t*)0x20000326 = 6);
    NONFAILING(*(uint8_t*)0x20000327 = 0);
    NONFAILING(*(uint8_t*)0x20000328 = 1);
    NONFAILING(*(uint8_t*)0x20000329 = 5);
    NONFAILING(*(uint8_t*)0x2000032a = 0x24);
    NONFAILING(*(uint8_t*)0x2000032b = 0);
    NONFAILING(*(uint16_t*)0x2000032c = 5);
    NONFAILING(*(uint8_t*)0x2000032e = 0xd);
    NONFAILING(*(uint8_t*)0x2000032f = 0x24);
    NONFAILING(*(uint8_t*)0x20000330 = 0xf);
    NONFAILING(*(uint8_t*)0x20000331 = 1);
    NONFAILING(*(uint32_t*)0x20000332 = 0xfffffffd);
    NONFAILING(*(uint16_t*)0x20000336 = 6);
    NONFAILING(*(uint16_t*)0x20000338 = 6);
    NONFAILING(*(uint8_t*)0x2000033a = 4);
    NONFAILING(*(uint8_t*)0x2000033b = 6);
    NONFAILING(*(uint8_t*)0x2000033c = 0x24);
    NONFAILING(*(uint8_t*)0x2000033d = 0x1a);
    NONFAILING(*(uint16_t*)0x2000033e = -1);
    NONFAILING(*(uint8_t*)0x20000340 = 0x1a);
    NONFAILING(*(uint8_t*)0x20000341 = 5);
    NONFAILING(*(uint8_t*)0x20000342 = 0x24);
    NONFAILING(*(uint8_t*)0x20000343 = 0x15);
    NONFAILING(*(uint16_t*)0x20000344 = 5);
    NONFAILING(*(uint8_t*)0x20000346 = 5);
    NONFAILING(*(uint8_t*)0x20000347 = 0x24);
    NONFAILING(*(uint8_t*)0x20000348 = 0x15);
    NONFAILING(*(uint16_t*)0x20000349 = 5);
    NONFAILING(*(uint8_t*)0x2000034b = 4);
    NONFAILING(*(uint8_t*)0x2000034c = 0x24);
    NONFAILING(*(uint8_t*)0x2000034d = 0x13);
    NONFAILING(*(uint8_t*)0x2000034e = 4);
    NONFAILING(*(uint8_t*)0x2000034f = 0xc);
    NONFAILING(*(uint8_t*)0x20000350 = 0x24);
    NONFAILING(*(uint8_t*)0x20000351 = 0x1b);
    NONFAILING(*(uint16_t*)0x20000352 = 5);
    NONFAILING(*(uint16_t*)0x20000354 = 0x200);
    NONFAILING(*(uint8_t*)0x20000356 = 0x59);
    NONFAILING(*(uint8_t*)0x20000357 = 4);
    NONFAILING(*(uint16_t*)0x20000358 = 0xff00);
    NONFAILING(*(uint8_t*)0x2000035a = -1);
    NONFAILING(*(uint8_t*)0x2000035b = 7);
    NONFAILING(*(uint8_t*)0x2000035c = 0x24);
    NONFAILING(*(uint8_t*)0x2000035d = 0xa);
    NONFAILING(*(uint8_t*)0x2000035e = 7);
    NONFAILING(*(uint8_t*)0x2000035f = 6);
    NONFAILING(*(uint8_t*)0x20000360 = 0);
    NONFAILING(*(uint8_t*)0x20000361 = 5);
    NONFAILING(*(uint8_t*)0x20000362 = 0xa);
    NONFAILING(*(uint8_t*)0x20000363 = 0x24);
    NONFAILING(*(uint8_t*)0x20000364 = 7);
    NONFAILING(*(uint8_t*)0x20000365 = 2);
    NONFAILING(*(uint16_t*)0x20000366 = 0);
    NONFAILING(*(uint16_t*)0x20000368 = 5);
    NONFAILING(*(uint16_t*)0x2000036a = 3);
    NONFAILING(*(uint8_t*)0x2000036c = 9);
    NONFAILING(*(uint8_t*)0x2000036d = 5);
    NONFAILING(*(uint8_t*)0x2000036e = 0x81);
    NONFAILING(*(uint8_t*)0x2000036f = 3);
    NONFAILING(*(uint16_t*)0x20000370 = 0x20);
    NONFAILING(*(uint8_t*)0x20000372 = 0);
    NONFAILING(*(uint8_t*)0x20000373 = 0xc3);
    NONFAILING(*(uint8_t*)0x20000374 = 0x1f);
    NONFAILING(*(uint8_t*)0x20000375 = 9);
    NONFAILING(*(uint8_t*)0x20000376 = 4);
    NONFAILING(*(uint8_t*)0x20000377 = 1);
    NONFAILING(*(uint8_t*)0x20000378 = 0);
    NONFAILING(*(uint8_t*)0x20000379 = 0);
    NONFAILING(*(uint8_t*)0x2000037a = 2);
    NONFAILING(*(uint8_t*)0x2000037b = 0xd);
    NONFAILING(*(uint8_t*)0x2000037c = 0);
    NONFAILING(*(uint8_t*)0x2000037d = 0);
    NONFAILING(*(uint8_t*)0x2000037e = 9);
    NONFAILING(*(uint8_t*)0x2000037f = 4);
    NONFAILING(*(uint8_t*)0x20000380 = 1);
    NONFAILING(*(uint8_t*)0x20000381 = 1);
    NONFAILING(*(uint8_t*)0x20000382 = 2);
    NONFAILING(*(uint8_t*)0x20000383 = 2);
    NONFAILING(*(uint8_t*)0x20000384 = 0xd);
    NONFAILING(*(uint8_t*)0x20000385 = 0);
    NONFAILING(*(uint8_t*)0x20000386 = 0);
    NONFAILING(*(uint8_t*)0x20000387 = 9);
    NONFAILING(*(uint8_t*)0x20000388 = 5);
    NONFAILING(*(uint8_t*)0x20000389 = 0x82);
    NONFAILING(*(uint8_t*)0x2000038a = 2);
    NONFAILING(*(uint16_t*)0x2000038b = 0x40);
    NONFAILING(*(uint8_t*)0x2000038d = 9);
    NONFAILING(*(uint8_t*)0x2000038e = 4);
    NONFAILING(*(uint8_t*)0x2000038f = 0x8d);
    NONFAILING(*(uint8_t*)0x20000390 = 9);
    NONFAILING(*(uint8_t*)0x20000391 = 5);
    NONFAILING(*(uint8_t*)0x20000392 = 3);
    NONFAILING(*(uint8_t*)0x20000393 = 2);
    NONFAILING(*(uint16_t*)0x20000394 = 0x3ff);
    NONFAILING(*(uint8_t*)0x20000396 = 5);
    NONFAILING(*(uint8_t*)0x20000397 = 0x22);
    NONFAILING(*(uint8_t*)0x20000398 = -1);
    NONFAILING(syz_usb_connect(4, 0x99, 0x20000300, 0));
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}