// https://syzkaller.appspot.com/bug?id=7a50d54a3012e8ed59746a5f3d3658f9e97dde3d
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

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

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

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 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);
}

#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))))

typedef struct {
  int state;
} event_t;

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

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

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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

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

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

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

static void netlink_nest(struct nlmsg* nlmsg, int typ)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_type = typ;
  nlmsg->pos += sizeof(*attr);
  nlmsg->nested[nlmsg->nesting++] = attr;
}

static void netlink_done(struct nlmsg* nlmsg)
{
  struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
  attr->nla_len = nlmsg->pos - (char*)attr;
}

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

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

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

static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
                                    const char* name, bool up)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  if (name)
    netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
  netlink_nest(nlmsg, IFLA_LINKINFO);
  netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}

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

static struct nlmsg nlmsg;

#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)
    ;
}

#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10

static const char* setup_802154()
{
  const char* error = NULL;
  int sock_generic = -1;
  int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock_route == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) failed";
    goto fail;
  }
  sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock_generic == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed";
    goto fail;
  }
  {
    int nl802154_family_id =
        netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
    if (nl802154_family_id < 0) {
      error = "netlink_query_family_id failed";
      goto fail;
    }
    for (int i = 0; i < 2; i++) {
      char devname[] = "wpan0";
      devname[strlen(devname) - 1] += i;
      uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
      uint16_t shortaddr = 0xaaa0 + i;
      int ifindex = if_nametoindex(devname);
      struct genlmsghdr genlhdr;
      memset(&genlhdr, 0, sizeof(genlhdr));
      genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
      netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
      netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
      netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
                   sizeof(shortaddr));
      if (netlink_send(&nlmsg, sock_generic) < 0) {
        error = "NL802154_CMD_SET_SHORT_ADDR failed";
        goto fail;
      }
      netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
                            sizeof(hwaddr), 0);
      if (i == 0) {
        netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false);
        netlink_done(&nlmsg);
        netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
        if (netlink_send(&nlmsg, sock_route) < 0) {
          error = "netlink: adding device lowpan0 type lowpan link wpan0";
          goto fail;
        }
      }
    }
  }
fail:
  close(sock_route);
  close(sock_generic);
  return error;
}

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)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 11; 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);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

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);
  }
}

void execute_call(int call)
{
  switch (call) {
  case 0:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
    //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
    //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
    //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
    //        type: bpf_prog_type = 0x0 (4 bytes)
    //        ninsn: bytesize8 = 0x14 (4 bytes)
    //        insns: nil
    //        license: nil
    //        loglev: int32 = 0x0 (4 bytes)
    //        logsize: len = 0x0 (4 bytes)
    //        log: nil
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0xa5 (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: union bpf_prog_attach_types {
    //          fallback: bpf_attach_types = 0x0 (4 bytes)
    //        }
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x0 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x0 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: bpf_btf_id (resource)
    //        attach_prog_fd: fd_bpf_prog (resource)
    //        core_relo_cnt: len = 0x0 (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x0 (4 bytes)
    //        log_true_size: int32 = 0x0 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    *(uint32_t*)0x2000000000c0 = 0;
    *(uint32_t*)0x2000000000c4 = 0x14;
    *(uint64_t*)0x2000000000c8 = 0;
    *(uint64_t*)0x2000000000d0 = 0;
    *(uint32_t*)0x2000000000d8 = 0;
    *(uint32_t*)0x2000000000dc = 0;
    *(uint64_t*)0x2000000000e0 = 0;
    *(uint32_t*)0x2000000000e8 = 0;
    *(uint32_t*)0x2000000000ec = 0xa5;
    memset((void*)0x2000000000f0, 0, 16);
    *(uint32_t*)0x200000000100 = 0;
    *(uint32_t*)0x200000000104 = 0;
    *(uint32_t*)0x200000000108 = -1;
    *(uint32_t*)0x20000000010c = 0;
    *(uint64_t*)0x200000000110 = 0;
    *(uint32_t*)0x200000000118 = 0;
    *(uint32_t*)0x20000000011c = 0;
    *(uint64_t*)0x200000000120 = 0;
    *(uint32_t*)0x200000000128 = 0;
    *(uint32_t*)0x20000000012c = 0;
    *(uint32_t*)0x200000000130 = 0;
    *(uint32_t*)0x200000000134 = 0;
    *(uint64_t*)0x200000000138 = 0;
    *(uint64_t*)0x200000000140 = 0;
    *(uint32_t*)0x200000000148 = 0;
    *(uint32_t*)0x20000000014c = 0;
    *(uint32_t*)0x200000000150 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x2000000000c0ul, /*size=*/0x94ul);
    break;
  case 1:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: nil
    //    size: len = 0x0 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul);
    break;
  case 2:
    //  perf_event_open arguments: [
    //    attr: ptr[in, perf_event_attr] {
    //      perf_event_attr {
    //        type: perf_event_type = 0x2 (4 bytes)
    //        size: len = 0x80 (4 bytes)
    //        config0: int8 = 0x29 (1 bytes)
    //        config1: int8 = 0x1 (1 bytes)
    //        config2: int8 = 0x0 (1 bytes)
    //        config3: int8 = 0x0 (1 bytes)
    //        config4: const = 0x0 (4 bytes)
    //        sample_freq: int64 = 0x4 (8 bytes)
    //        sample_type: perf_sample_type = 0x510 (8 bytes)
    //        read_format: perf_read_format = 0x15 (8 bytes)
    //        disabled: int64 = 0x0 (0 bytes)
    //        inherit: int64 = 0x0 (0 bytes)
    //        pinned: int64 = 0x0 (0 bytes)
    //        exclusive: int64 = 0x0 (0 bytes)
    //        exclude_user: int64 = 0x0 (0 bytes)
    //        exclude_kernel: int64 = 0x0 (0 bytes)
    //        exclude_hv: int64 = 0x0 (0 bytes)
    //        exclude_idle: int64 = 0x0 (0 bytes)
    //        mmap: int64 = 0x0 (0 bytes)
    //        comm: int64 = 0x0 (0 bytes)
    //        freq: int64 = 0x0 (0 bytes)
    //        inherit_stat: int64 = 0x0 (0 bytes)
    //        enable_on_exec: int64 = 0x0 (0 bytes)
    //        task: int64 = 0x0 (0 bytes)
    //        watermark: int64 = 0x0 (0 bytes)
    //        precise_ip: int64 = 0x0 (0 bytes)
    //        mmap_data: int64 = 0x0 (0 bytes)
    //        sample_id_all: int64 = 0x0 (0 bytes)
    //        exclude_host: int64 = 0x0 (0 bytes)
    //        exclude_guest: int64 = 0x0 (0 bytes)
    //        exclude_callchain_kernel: int64 = 0x0 (0 bytes)
    //        exclude_callchain_user: int64 = 0x0 (0 bytes)
    //        mmap2: int64 = 0x0 (0 bytes)
    //        comm_exec: int64 = 0x0 (0 bytes)
    //        use_clockid: int64 = 0x0 (0 bytes)
    //        context_switch: int64 = 0x0 (0 bytes)
    //        write_backward: int64 = 0x0 (0 bytes)
    //        namespaces: int64 = 0x0 (0 bytes)
    //        ksymbol: int64 = 0x0 (0 bytes)
    //        bpf_event: int64 = 0x0 (0 bytes)
    //        aux_output: int64 = 0x0 (0 bytes)
    //        cgroup: int64 = 0x0 (0 bytes)
    //        text_poke: int64 = 0x0 (0 bytes)
    //        build_id: int64 = 0x0 (0 bytes)
    //        inherit_thread: int64 = 0x0 (0 bytes)
    //        remove_on_exec: int64 = 0x0 (0 bytes)
    //        sigtrap: int64 = 0x0 (0 bytes)
    //        __reserved_1: const = 0x0 (8 bytes)
    //        wakeup_events: int32 = 0xfffffffe (4 bytes)
    //        bp_type: perf_bp_type = 0x1 (4 bytes)
    //        bp_config: union perf_bp_config {
    //          perf_bp: perf_bp {
    //            bp_addr: nil
    //            bp_len: perf_bp_lens = 0x0 (8 bytes)
    //          }
    //        }
    //        branch_sample_type: perf_branch_sample_type = 0x0 (8 bytes)
    //        sample_regs_user: int64 = 0x10000 (8 bytes)
    //        sample_stack_user: int32 = 0x0 (4 bytes)
    //        clockid: clock_type = 0x5 (4 bytes)
    //        sample_regs_intr: int64 = 0xb (8 bytes)
    //        aux_watermark: int32 = 0x20005 (4 bytes)
    //        sample_max_stack: int16 = 0x0 (2 bytes)
    //        __reserved_2: const = 0x0 (2 bytes)
    //        aux_sample_size: int32 = 0x0 (4 bytes)
    //        __reserved_3: const = 0x0 (4 bytes)
    //        sig_data: int64 = 0x20000006 (8 bytes)
    //      }
    //    }
    //    pid: pid (resource)
    //    cpu: intptr = 0xffffffffffffffff (8 bytes)
    //    group: fd_perf (resource)
    //    flags: perf_flags = 0x2 (8 bytes)
    //  ]
    //  returns fd_perf
    *(uint32_t*)0x200000000140 = 2;
    *(uint32_t*)0x200000000144 = 0x80;
    *(uint8_t*)0x200000000148 = 0x29;
    *(uint8_t*)0x200000000149 = 1;
    *(uint8_t*)0x20000000014a = 0;
    *(uint8_t*)0x20000000014b = 0;
    *(uint32_t*)0x20000000014c = 0;
    *(uint64_t*)0x200000000150 = 4;
    *(uint64_t*)0x200000000158 = 0x510;
    *(uint64_t*)0x200000000160 = 0x15;
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 0, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 1, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 2, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 3, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 4, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 5, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 6, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 7, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 8, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 9, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 10, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 11, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 12, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 13, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 14, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 15, 2);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 17, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 18, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 19, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 20, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 21, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 22, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 23, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 24, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 25, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 26, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 27, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 28, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 29, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 30, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 31, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 32, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 33, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 34, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 35, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 36, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 37, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000168, 0, 38, 26);
    *(uint32_t*)0x200000000170 = 0xfffffffe;
    *(uint32_t*)0x200000000174 = 1;
    *(uint64_t*)0x200000000178 = 0;
    *(uint64_t*)0x200000000180 = 0;
    *(uint64_t*)0x200000000188 = 0;
    *(uint64_t*)0x200000000190 = 0x10000;
    *(uint32_t*)0x200000000198 = 0;
    *(uint32_t*)0x20000000019c = 5;
    *(uint64_t*)0x2000000001a0 = 0xb;
    *(uint32_t*)0x2000000001a8 = 0x20005;
    *(uint16_t*)0x2000000001ac = 0;
    *(uint16_t*)0x2000000001ae = 0;
    *(uint32_t*)0x2000000001b0 = 0;
    *(uint32_t*)0x2000000001b4 = 0;
    *(uint64_t*)0x2000000001b8 = 0x20000006;
    syscall(__NR_perf_event_open, /*attr=*/0x200000000140ul, /*pid=*/0,
            /*cpu=*/(intptr_t)-1, /*group=*/(intptr_t)-1,
            /*flags=PERF_FLAG_FD_OUTPUT*/ 2ul);
    break;
  case 3:
    //  bpf$MAP_CREATE arguments: [
    //    cmd: const = 0x0 (8 bytes)
    //    arg: nil
    //    size: len = 0x0 (8 bytes)
    //  ]
    //  returns fd_bpf_map
    syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0ul);
    break;
  case 4:
    //  perf_event_open arguments: [
    //    attr: ptr[in, perf_event_attr] {
    //      perf_event_attr {
    //        type: perf_event_type = 0x1 (4 bytes)
    //        size: len = 0x80 (4 bytes)
    //        config0: int8 = 0x0 (1 bytes)
    //        config1: int8 = 0x0 (1 bytes)
    //        config2: int8 = 0x0 (1 bytes)
    //        config3: int8 = 0x0 (1 bytes)
    //        config4: const = 0x0 (4 bytes)
    //        sample_freq: int64 = 0x3ff (8 bytes)
    //        sample_type: perf_sample_type = 0x22a0 (8 bytes)
    //        read_format: perf_read_format = 0x4 (8 bytes)
    //        disabled: int64 = 0x0 (0 bytes)
    //        inherit: int64 = 0x0 (0 bytes)
    //        pinned: int64 = 0x0 (0 bytes)
    //        exclusive: int64 = 0x0 (0 bytes)
    //        exclude_user: int64 = 0x0 (0 bytes)
    //        exclude_kernel: int64 = 0x0 (0 bytes)
    //        exclude_hv: int64 = 0x0 (0 bytes)
    //        exclude_idle: int64 = 0x0 (0 bytes)
    //        mmap: int64 = 0x0 (0 bytes)
    //        comm: int64 = 0x0 (0 bytes)
    //        freq: int64 = 0x0 (0 bytes)
    //        inherit_stat: int64 = 0x0 (0 bytes)
    //        enable_on_exec: int64 = 0x0 (0 bytes)
    //        task: int64 = 0x0 (0 bytes)
    //        watermark: int64 = 0x0 (0 bytes)
    //        precise_ip: int64 = 0x0 (0 bytes)
    //        mmap_data: int64 = 0x0 (0 bytes)
    //        sample_id_all: int64 = 0x0 (0 bytes)
    //        exclude_host: int64 = 0x0 (0 bytes)
    //        exclude_guest: int64 = 0x0 (0 bytes)
    //        exclude_callchain_kernel: int64 = 0x0 (0 bytes)
    //        exclude_callchain_user: int64 = 0x0 (0 bytes)
    //        mmap2: int64 = 0x0 (0 bytes)
    //        comm_exec: int64 = 0x0 (0 bytes)
    //        use_clockid: int64 = 0x0 (0 bytes)
    //        context_switch: int64 = 0x0 (0 bytes)
    //        write_backward: int64 = 0x0 (0 bytes)
    //        namespaces: int64 = 0x0 (0 bytes)
    //        ksymbol: int64 = 0x0 (0 bytes)
    //        bpf_event: int64 = 0x0 (0 bytes)
    //        aux_output: int64 = 0x0 (0 bytes)
    //        cgroup: int64 = 0x0 (0 bytes)
    //        text_poke: int64 = 0x0 (0 bytes)
    //        build_id: int64 = 0x0 (0 bytes)
    //        inherit_thread: int64 = 0x0 (0 bytes)
    //        remove_on_exec: int64 = 0x0 (0 bytes)
    //        sigtrap: int64 = 0x0 (0 bytes)
    //        __reserved_1: const = 0x0 (8 bytes)
    //        wakeup_events: int32 = 0xff (4 bytes)
    //        bp_type: perf_bp_type = 0x0 (4 bytes)
    //        bp_config: union perf_bp_config {
    //          perf_config_ext: perf_config_ext {
    //            config1: int64 = 0x0 (8 bytes)
    //            config2: int64 = 0x1 (8 bytes)
    //          }
    //        }
    //        branch_sample_type: perf_branch_sample_type = 0x18208 (8 bytes)
    //        sample_regs_user: int64 = 0x3 (8 bytes)
    //        sample_stack_user: int32 = 0x0 (4 bytes)
    //        clockid: clock_type = 0x0 (4 bytes)
    //        sample_regs_intr: int64 = 0x1000 (8 bytes)
    //        aux_watermark: int32 = 0x0 (4 bytes)
    //        sample_max_stack: int16 = 0x3 (2 bytes)
    //        __reserved_2: const = 0x0 (2 bytes)
    //        aux_sample_size: int32 = 0x0 (4 bytes)
    //        __reserved_3: const = 0x0 (4 bytes)
    //        sig_data: int64 = 0x0 (8 bytes)
    //      }
    //    }
    //    pid: pid (resource)
    //    cpu: intptr = 0xffefffffffffffff (8 bytes)
    //    group: fd_perf (resource)
    //    flags: perf_flags = 0x0 (8 bytes)
    //  ]
    //  returns fd_perf
    *(uint32_t*)0x200000000700 = 1;
    *(uint32_t*)0x200000000704 = 0x80;
    *(uint8_t*)0x200000000708 = 0;
    *(uint8_t*)0x200000000709 = 0;
    *(uint8_t*)0x20000000070a = 0;
    *(uint8_t*)0x20000000070b = 0;
    *(uint32_t*)0x20000000070c = 0;
    *(uint64_t*)0x200000000710 = 0x3ff;
    *(uint64_t*)0x200000000718 = 0x22a0;
    *(uint64_t*)0x200000000720 = 4;
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 0, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 1, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 2, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 3, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 4, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 5, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 6, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 7, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 8, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 9, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 10, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 11, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 12, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 13, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 14, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 15, 2);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 17, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 18, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 19, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 20, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 21, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 22, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 23, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 24, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 25, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 26, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 27, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 28, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 29, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 30, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 31, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 32, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 33, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 34, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 35, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 36, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 37, 1);
    STORE_BY_BITMASK(uint64_t, , 0x200000000728, 0, 38, 26);
    *(uint32_t*)0x200000000730 = 0xff;
    *(uint32_t*)0x200000000734 = 0;
    *(uint64_t*)0x200000000738 = 0;
    *(uint64_t*)0x200000000740 = 1;
    *(uint64_t*)0x200000000748 = 0x18208;
    *(uint64_t*)0x200000000750 = 3;
    *(uint32_t*)0x200000000758 = 0;
    *(uint32_t*)0x20000000075c = 0;
    *(uint64_t*)0x200000000760 = 0x1000;
    *(uint32_t*)0x200000000768 = 0;
    *(uint16_t*)0x20000000076c = 3;
    *(uint16_t*)0x20000000076e = 0;
    *(uint32_t*)0x200000000770 = 0;
    *(uint32_t*)0x200000000774 = 0;
    *(uint64_t*)0x200000000778 = 0;
    syscall(__NR_perf_event_open, /*attr=*/0x200000000700ul, /*pid=*/0,
            /*cpu=*/0xffeffffffffffffful, /*group=*/(intptr_t)-1,
            /*flags=*/0ul);
    break;
  case 5:
    //  bpf$MAP_CREATE_CONST_STR arguments: [
    //    cmd: const = 0x0 (8 bytes)
    //    arg: nil
    //    size: len = 0x48 (8 bytes)
    //  ]
    //  returns fd_bpf_const_str_map
    syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0x48ul);
    break;
  case 6:
    //  bpf$BPF_MAP_CONST_STR_FREEZE arguments: [
    //    cmd: const = 0x16 (8 bytes)
    //    arg: nil
    //    size: len = 0x0 (8 bytes)
    //  ]
    syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0ul, /*size=*/0ul);
    break;
  case 7:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: nil
    //    size: len = 0x0 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul);
    break;
  case 8:
    //  bpf$BPF_PROG_TEST_RUN arguments: [
    //    cmd: const = 0xa (8 bytes)
    //    arg: nil
    //    size: len = 0x0 (8 bytes)
    //  ]
    syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0ul, /*size=*/0ul);
    break;
  case 9:
    //  ioctl$SIOCSIFHWADDR arguments: [
    //    fd: fd_tun (resource)
    //    cmd: const = 0x8b1a (4 bytes)
    //    arg: nil
    //  ]
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x8b1a, /*arg=*/0ul);
    break;
  case 10:
    //  sendmsg$kcm arguments: [
    //    fd: sock_kcm (resource)
    //    msg: nil
    //    f: send_flags = 0x0 (8 bytes)
    //  ]
    syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul, /*f=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*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=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  if ((reason = setup_802154()))
    printf("the reproducer may not work as expected: 802154 injection setup "
           "failed: %s\n",
           reason);
  use_temporary_dir();
  loop();
  return 0;
}