// https://syzkaller.appspot.com/bug?id=29f52d4baeec7d90c9fd0fb991721f3cad42a4d5
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <setjmp.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/mman.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/futex.h>
#include <linux/loop.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

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);
}

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 {
  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;
}

//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:

//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty.  In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//%    claim that you wrote the original software. If you use this software
//%    in a product, an acknowledgment in the product documentation would be
//%    appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//%    misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler    madler@alumni.caltech.edu

//% BEGIN CODE DERIVED FROM puff.{c,h}

#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288

struct puff_state {
  unsigned char* out;
  unsigned long outlen;
  unsigned long outcnt;
  const unsigned char* in;
  unsigned long inlen;
  unsigned long incnt;
  int bitbuf;
  int bitcnt;
  jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
  long val = s->bitbuf;
  while (s->bitcnt < need) {
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    val |= (long)(s->in[s->incnt++]) << s->bitcnt;
    s->bitcnt += 8;
  }
  s->bitbuf = (int)(val >> need);
  s->bitcnt -= need;
  return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
  s->bitbuf = 0;
  s->bitcnt = 0;
  if (s->incnt + 4 > s->inlen)
    return 2;
  unsigned len = s->in[s->incnt++];
  len |= s->in[s->incnt++] << 8;
  if (s->in[s->incnt++] != (~len & 0xff) ||
      s->in[s->incnt++] != ((~len >> 8) & 0xff))
    return -2;
  if (s->incnt + len > s->inlen)
    return 2;
  if (s->outcnt + len > s->outlen)
    return 1;
  for (; len--; s->outcnt++, s->incnt++) {
    if (s->in[s->incnt])
      s->out[s->outcnt] = s->in[s->incnt];
  }
  return 0;
}
struct puff_huffman {
  short* count;
  short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
  int first = 0;
  int index = 0;
  int bitbuf = s->bitbuf;
  int left = s->bitcnt;
  int code = first = index = 0;
  int len = 1;
  short* next = h->count + 1;
  while (1) {
    while (left--) {
      code |= bitbuf & 1;
      bitbuf >>= 1;
      int count = *next++;
      if (code - count < first) {
        s->bitbuf = bitbuf;
        s->bitcnt = (s->bitcnt - len) & 7;
        return h->symbol[index + (code - first)];
      }
      index += count;
      first += count;
      first <<= 1;
      code <<= 1;
      len++;
    }
    left = (MAXBITS + 1) - len;
    if (left == 0)
      break;
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    bitbuf = s->in[s->incnt++];
    if (left > 8)
      left = 8;
  }
  return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
  int len;
  for (len = 0; len <= MAXBITS; len++)
    h->count[len] = 0;
  int symbol;
  for (symbol = 0; symbol < n; symbol++)
    (h->count[length[symbol]])++;
  if (h->count[0] == n)
    return 0;
  int left = 1;
  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= h->count[len];
    if (left < 0)
      return left;
  }
  short offs[MAXBITS + 1];
  offs[1] = 0;
  for (len = 1; len < MAXBITS; len++)
    offs[len + 1] = offs[len] + h->count[len];
  for (symbol = 0; symbol < n; symbol++)
    if (length[symbol] != 0)
      h->symbol[offs[length[symbol]]++] = symbol;
  return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
                      const struct puff_huffman* distcode)
{
  static const short lens[29] = {3,  4,  5,  6,   7,   8,   9,   10,  11, 13,
                                 15, 17, 19, 23,  27,  31,  35,  43,  51, 59,
                                 67, 83, 99, 115, 131, 163, 195, 227, 258};
  static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
                                 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
  static const short dists[30] = {
      1,    2,    3,    4,    5,    7,    9,    13,    17,    25,
      33,   49,   65,   97,   129,  193,  257,  385,   513,   769,
      1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
  static const short dext[30] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
                                 4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
                                 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
  int symbol;
  do {
    symbol = puff_decode(s, lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 256) {
      if (s->outcnt == s->outlen)
        return 1;
      if (symbol)
        s->out[s->outcnt] = symbol;
      s->outcnt++;
    } else if (symbol > 256) {
      symbol -= 257;
      if (symbol >= 29)
        return -10;
      int len = lens[symbol] + puff_bits(s, lext[symbol]);
      symbol = puff_decode(s, distcode);
      if (symbol < 0)
        return symbol;
      unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
      if (dist > s->outcnt)
        return -11;
      if (s->outcnt + len > s->outlen)
        return 1;
      while (len--) {
        if (dist <= s->outcnt && s->out[s->outcnt - dist])
          s->out[s->outcnt] = s->out[s->outcnt - dist];
        s->outcnt++;
      }
    }
  } while (symbol != 256);
  return 0;
}
static int puff_fixed(struct puff_state* s)
{
  static int virgin = 1;
  static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
  static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  static struct puff_huffman lencode, distcode;
  if (virgin) {
    lencode.count = lencnt;
    lencode.symbol = lensym;
    distcode.count = distcnt;
    distcode.symbol = distsym;
    short lengths[FIXLCODES];
    int symbol;
    for (symbol = 0; symbol < 144; symbol++)
      lengths[symbol] = 8;
    for (; symbol < 256; symbol++)
      lengths[symbol] = 9;
    for (; symbol < 280; symbol++)
      lengths[symbol] = 7;
    for (; symbol < FIXLCODES; symbol++)
      lengths[symbol] = 8;
    puff_construct(&lencode, lengths, FIXLCODES);
    for (symbol = 0; symbol < MAXDCODES; symbol++)
      lengths[symbol] = 5;
    puff_construct(&distcode, lengths, MAXDCODES);
    virgin = 0;
  }
  return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
  static const short order[19] = {16, 17, 18, 0, 8,  7, 9,  6, 10, 5,
                                  11, 4,  12, 3, 13, 2, 14, 1, 15};
  int nlen = puff_bits(s, 5) + 257;
  int ndist = puff_bits(s, 5) + 1;
  int ncode = puff_bits(s, 4) + 4;
  if (nlen > MAXLCODES || ndist > MAXDCODES)
    return -3;
  short lengths[MAXCODES];
  int index;
  for (index = 0; index < ncode; index++)
    lengths[order[index]] = puff_bits(s, 3);
  for (; index < 19; index++)
    lengths[order[index]] = 0;
  short lencnt[MAXBITS + 1], lensym[MAXLCODES];
  struct puff_huffman lencode = {lencnt, lensym};
  int err = puff_construct(&lencode, lengths, 19);
  if (err != 0)
    return -4;
  index = 0;
  while (index < nlen + ndist) {
    int symbol;
    int len;
    symbol = puff_decode(s, &lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 16)
      lengths[index++] = symbol;
    else {
      len = 0;
      if (symbol == 16) {
        if (index == 0)
          return -5;
        len = lengths[index - 1];
        symbol = 3 + puff_bits(s, 2);
      } else if (symbol == 17)
        symbol = 3 + puff_bits(s, 3);
      else
        symbol = 11 + puff_bits(s, 7);
      if (index + symbol > nlen + ndist)
        return -6;
      while (symbol--)
        lengths[index++] = len;
    }
  }
  if (lengths[256] == 0)
    return -9;
  err = puff_construct(&lencode, lengths, nlen);
  if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
    return -7;
  short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  struct puff_huffman distcode = {distcnt, distsym};
  err = puff_construct(&distcode, lengths + nlen, ndist);
  if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
    return -8;
  return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
                const unsigned char* source, unsigned long sourcelen)
{
  struct puff_state s = {
      .out = dest,
      .outlen = *destlen,
      .outcnt = 0,
      .in = source,
      .inlen = sourcelen,
      .incnt = 0,
      .bitbuf = 0,
      .bitcnt = 0,
  };
  int err;
  if (setjmp(s.env) != 0)
    err = 2;
  else {
    int last;
    do {
      last = puff_bits(&s, 1);
      int type = puff_bits(&s, 2);
      err = type == 0 ? puff_stored(&s)
                      : (type == 1 ? puff_fixed(&s)
                                   : (type == 2 ? puff_dynamic(&s) : -1));
      if (err != 0)
        break;
    } while (!last);
  }
  *destlen = s.outcnt;
  return err;
}

//% END CODE DERIVED FROM puff.{c,h}

#define ZLIB_HEADER_WIDTH 2

static int puff_zlib_to_file(const unsigned char* source,
                             unsigned long sourcelen, int dest_fd)
{
  if (sourcelen < ZLIB_HEADER_WIDTH)
    return 0;
  source += ZLIB_HEADER_WIDTH;
  sourcelen -= ZLIB_HEADER_WIDTH;
  const unsigned long max_destlen = 132 << 20;
  void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
                   MAP_PRIVATE | MAP_ANON, -1, 0);
  if (ret == MAP_FAILED)
    return -1;
  unsigned char* dest = (unsigned char*)ret;
  unsigned long destlen = max_destlen;
  int err = puff(dest, &destlen, source, sourcelen);
  if (err) {
    munmap(dest, max_destlen);
    errno = -err;
    return -1;
  }
  if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
    munmap(dest, max_destlen);
    return -1;
  }
  return munmap(dest, max_destlen);
}

static int setup_loop_device(unsigned char* data, unsigned long size,
                             const char* loopname, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (puff_zlib_to_file(data, size, memfd)) {
    err = errno;
    goto error_close_memfd;
  }
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  close(memfd);
  *loopfd_p = loopfd;
  return 0;

error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return -1;
}

static void reset_loop_device(const char* loopname)
{
  int loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    return;
  }
  if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
  }
  close(loopfd);
}

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device)
    reset_loop_device(loopname);
  errno = err;
  return res;
}

#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 reset_loop()
{
  char buf[64];
  snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
  int loopfd = open(buf, O_RDWR);
  if (loopfd != -1) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
}

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)
    ;
}

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 < 6; 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 + (call == 1 ? 4000 : 0));
      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);
    reset_loop();
    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:
    syscall(__NR_sync);
    break;
  case 1:
    memcpy((void*)0x20000040, "nilfs2\000", 7);
    memcpy((void*)0x20000340, "./bus\000", 6);
    memcpy(
        (void*)0x20000a40,
        "\x78\x9c\xec\xdd\x4d\x8c\x5b\x47\x01\x00\xe0\xb1\x77\xbd\xc9\xb6\x29"
        "\x71\x4a\x42\x97\x34\xb4\x09\x85\xb6\xfc\x74\xd3\xec\x2e\xe1\x27\x82"
        "\xa4\x4a\x84\x44\xd4\x54\x88\x4b\xa5\x08\x0e\x51\x9a\x96\x88\x10\x24"
        "\x8a\x04\x54\x95\x48\x72\xe2\x46\xab\x2a\x48\x9c\xf8\x11\xa7\x5e\xaa"
        "\x82\x90\xe8\x05\x45\x3d\x71\xa9\x44\x23\x55\x48\x3d\x15\x0e\x1c\x88"
        "\x82\x88\xc4\x01\x02\x89\xd1\xee\xce\x78\xed\x89\xdd\x67\xef\x8f\x9f"
        "\xbd\xfe\x3e\x69\x3c\x7e\x6f\xde\xf3\xcc\x3c\x3f\x3f\xbf\xdf\x99\x00"
        "\x8c\xad\xea\xd2\xeb\xc2\xc2\x4c\x25\x84\xcb\x6f\xbc\x72\xec\xef\x0f"
        "\xff\x6d\x7a\x71\xcc\xe1\xe6\x14\xf5\xa5\xd7\xc9\x96\xa1\x5a\x08\xa1"
        "\x12\x87\x27\xb3\xcf\x7b\x6f\x62\x39\xbe\x75\xe3\xc5\xd3\x9d\xe2\x4a"
        "\x98\x5b\x7a\x4d\xc3\xe1\xa9\xeb\xcd\x79\xef\x0e\x21\x5c\x08\x7b\xc3"
        "\x95\x50\x0f\xbb\x2f\x5f\x7d\xf9\xad\xb9\x27\x4f\x5c\x3c\x7e\x69\xdf"
        "\xdb\xaf\x1e\xba\xb6\x31\xb5\x07\x00\x80\xf1\xf2\xd5\x2b\x87\x16\x76"
        "\xfd\xe5\x4f\xf7\xef\xb8\xf9\xda\x03\x47\xc2\x96\x34\x7a\xf1\xcd\xd2"
        "\xfe\x79\x3d\x8e\xd8\x16\xf7\xfb\x8f\xc4\x1d\xff\xb4\xff\x5f\x0d\xed"
        "\xc3\x95\x96\xd0\x6a\x2a\x9b\x6e\x32\x86\xea\x74\xfb\x74\x13\x1d\xa6"
        "\x6b\xcd\xa7\x96\x4d\x37\xd9\x25\xff\xa9\x2c\xff\x5a\x97\xe9\xb6\x84"
        "\xf7\xcf\x7f\xa2\x65\x5c\xa7\x7a\xc3\x28\x4b\xeb\x71\x3d\x54\xaa\xb3"
        "\x6d\xc3\xd5\xea\xec\xec\xf2\x31\x79\x58\x3a\xae\x9f\xaa\xcc\x9e\x3f"
        "\x7b\xee\xd9\xe7\x4b\x2a\x28\xb0\xee\xfe\xf5\x60\x08\x61\x6f\x4b\x38"
        "\x7a\xa9\x7d\x78\xb5\xe1\x1b\x71\xcb\xb1\x1e\x9f\xd5\x1a\x0e\x6f\xc0"
        "\x67\xae\x31\xd4\x7a\xac\x67\x63\x08\xca\x3a\x92\xe1\xc8\xe0\xf2\xba"
        "\xd9\x58\x56\x7a\x9d\x07\x14\x1a\xdb\x4b\xde\x00\x01\x44\xf9\xf5\xc2"
        "\x3b\x5c\xc8\xcf\x2c\xac\x4d\xf3\xd3\x26\x7b\xcb\xff\xfa\x13\xd5\xce"
        "\xf3\xc3\x3a\x18\xf4\xfa\xdf\x57\xfe\x53\x25\xe7\x1f\xe4\xff\xeb\x8b"
        "\xb6\x38\xac\x9f\xcd\xba\x36\xa5\x7a\xa5\xdf\xd1\xb6\x38\x9c\x5f\x47"
        "\xc8\xef\x5f\xea\xfe\xfb\xcb\xaf\x74\xb4\x8f\xcd\xaf\x47\xd4\x7a\x2c"
        "\x67\xb7\xeb\x08\xa3\x72\x7d\xa1\x5b\x39\x27\x06\x5c\x8e\xd5\xea\x56"
        "\xfe\x7c\xbd\xd8\xac\xbe\x18\xe3\xb4\x1c\xbe\x94\xa5\xb7\xfe\x7e\xf2"
        "\xef\x74\x54\xbe\x63\xa0\xb3\x7f\xe7\xe7\xff\x05\x41\x18\xee\x10\xda"
        "\x86\x6b\x6b\xf9\xac\x46\xc9\xdb\x1f\x60\x78\xe5\xf7\xcd\x35\xd2\xf5"
        "\xd1\x28\xbf\xaf\x2f\x4f\xdf\x52\x90\xbe\xb5\x20\x7d\xba\x20\xfd\xae"
        "\x82\xf4\xbb\x0b\xd2\x61\x9c\xfd\xf6\x7b\x3f\x09\x2f\x55\x56\x8e\xf3"
        "\xf3\x63\xfa\x7e\xcf\x87\xa7\xf3\x6c\xf7\xc4\xf8\x03\x7d\x96\x27\x3f"
        "\x1f\xd9\x6f\xfe\xf9\x7d\xbf\xfd\x5a\x6b\xfe\xf9\xfd\xc4\x30\xcc\x7e"
        "\x7f\xea\xe9\x33\x9f\x7b\xe6\xe4\xd5\xe5\xfb\xff\x2b\xcd\xf5\xff\x76"
        "\x5c\xdf\xd3\xe1\x46\x3d\xfe\xb6\xae\xc4\x09\xd2\xf9\xc2\xfc\xbc\x7a"
        "\xf3\xde\xff\x7a\x7b\x3e\xd5\x2e\xd3\xdd\x9b\x95\xe7\x9e\x0e\xd3\x2f"
        "\xbd\xdf\xd9\x3e\x5d\x65\xe7\xca\xe7\x84\x96\xed\xcc\x1d\xe5\x98\x69"
        "\x9f\x6f\x7b\xb7\xe9\xf6\xb4\x4f\x57\xcf\xa6\x9b\x8e\x61\x6b\x56\xde"
        "\x7c\xff\xe4\xae\x6c\xbe\xb4\xff\x91\xb6\xab\x69\x79\x4d\x66\xf5\xad"
        "\x65\xf5\x98\xca\xca\x91\xb6\x2b\x3b\x62\x9c\x97\x03\x56\x23\xad\x8f"
        "\xdd\xee\xff\x4f\xeb\xe7\x4c\xa8\x55\x9e\x3d\x7b\xee\xcc\xe3\x71\x38"
        "\xad\xa7\x7f\x9c\xa8\x6d\x59\x1c\x7f\x60\xc0\xe5\x06\xd6\xae\xd7\xe7"
        "\x7f\x66\x42\xfb\xf3\x3f\xdb\x9a\xe3\x6b\xd5\xd6\xed\xc2\xf6\x95\xf1"
        "\x95\xe5\xed\xc2\xeb\xf1\xf3\xda\xc7\xcf\x35\xf3\x69\x1f\x3f\x1f\x87"
        "\xd3\xff\xdc\x37\x27\xa6\x97\xc6\xcf\x9e\xfe\xce\xb9\x67\xd6\xbf\xfa"
        "\x30\xd6\x9e\xff\xe1\x0b\xdf\x3a\x75\xee\xdc\x99\xef\x96\xfe\x66\x7e"
        "\x3a\x84\x21\x28\xc6\x2a\xde\x7c\x79\x38\x8a\xd1\xcf\x9b\x74\xd8\x32"
        "\x2c\xe5\x59\xf5\x9b\xc5\x8a\x0c\x41\x31\x36\xe1\x9b\x92\x37\x4c\xc0"
        "\x86\xdb\xff\xa3\xe5\x9d\x80\xc7\xce\x7e\xfb\xd4\x73\x67\x9e\x3b\x73"
        "\x7e\xfe\xe0\xc1\xf9\xb9\xb9\x83\x9f\x9f\x5f\xd8\xbf\xb4\x5f\xbf\xbf"
        "\x75\xef\xbe\xd5\x85\x12\x4a\x0b\xac\xa7\x95\x3f\xfd\xb2\x4b\x02\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\xf4\xea\xfb\xc7\x8f\x5d\x7d\xe7\xcd"
        "\xcf\xbe\xbb\xfc\xfc\xff\xca\xf3\x7f\xe9\xf9\xff\x74\xe7\x6f\x7a\xfe"
        "\xff\xc7\xd9\xf3\xff\xf9\x73\xf2\xe9\x39\xf8\xf4\x1c\xe0\x8e\x0e\xe9"
        "\x4b\xd3\x64\x0d\xac\x4e\x65\xd3\xd5\x62\xf8\x60\x56\xde\x9d\x59\x3e"
        "\xbb\xb2\xf9\x3e\x14\xe3\x66\x3f\x7e\xf1\xf9\xff\x94\x5d\xde\xae\x6b"
        "\x2a\xcf\x7d\xd9\xf8\x5a\x97\xc1\xac\x39\x81\x3b\xda\x4b\x99\xca\xda"
        "\x20\xc9\xfb\x0b\xfc\x68\x8c\x2f\xc5\xf8\x57\x01\x4a\x54\x99\xee\x3c"
        "\x3a\xc6\x45\xed\x5b\xa7\x75\x3d\xb5\x4f\xd1\xd2\x2e\x45\x43\xfb\xc0"
        "\xa3\x23\x7d\x6f\x69\x6d\x48\xed\x98\xa4\xe7\xbf\x3b\xb6\xeb\xd4\xf2"
        "\x65\xef\x18\x40\x19\x59\x7f\x83\x78\x9c\xb0\xec\x3a\x02\x9d\xfd\x63"
        "\xac\xda\xff\xfe\xe7\x4a\xc5\x4b\x2f\x8b\xd0\x3d\x4c\x0e\x36\xbf\x9f"
        "\x8d\xef\x3a\xd1\xe8\xba\x97\xde\x6b\x0f\x36\x00\xeb\xa3\xec\xfe\x3f"
        "\xd3\x79\xcf\x14\x9f\xff\xc3\x57\xb6\x2e\x86\x34\xd9\xf5\x27\xda\xb7"
        "\x97\x79\xfb\xa5\xd0\x8f\x3f\xbf\xd3\x3e\x3c\xec\xfd\x4f\x6e\x74\xfe"
        "\x79\xbf\x7d\x83\xce\xbf\xec\xfa\x0f\xba\xff\xcf\x66\xff\x77\x3d\x6f"
        "\xff\xb2\x1e\xf3\xea\xab\xcb\xf7\x3f\x3f\xbf\xf6\x6e\x4b\xb6\x61\x77"
        "\xaf\xf9\xe7\xf5\x4f\xed\x40\xef\xec\x2f\xff\x9b\x31\xff\x54\x9b\x47"
        "\x42\x6f\xf9\x37\x7e\x99\xe5\x9f\x5f\x10\xea\xd1\x7f\xb3\xfc\xef\xea"
        "\x31\xff\x3b\xea\xbf\x67\x75\xf9\xff\x2f\xe6\x9f\x16\xdb\xa3\x0f\xf5"
        "\x9a\x7f\x75\xf9\x9a\x59\xb5\xbd\x1c\xf9\x79\xe3\x74\xfd\x2f\x3f\x6f"
        "\x9c\xdc\xca\xea\x9f\xda\xf6\x7c\x9f\xfc\xbf\xf6\x42\xa7\xfa\xaf\xb2"
        "\xa3\xc6\xdb\x31\x7f\x18\x67\xa3\xd2\xcf\x6c\xbf\xb2\xfd\x88\xe6\x4e"
        "\xfb\xea\xfb\xff\x8d\x2e\xac\x6f\xff\xbf\xcd\xc2\x66\x9b\xb5\xfc\x3e"
        "\x8c\xcf\xc4\x31\x69\x43\x9c\xee\x73\xc8\xfb\x3b\xe9\xb7\xfc\xe9\xfe"
        "\x8a\xf4\x3f\xb0\x2b\xfb\xfc\x4a\xc1\xff\x9b\xfe\x7f\x47\xdb\x17\x62"
        "\x5c\xf4\x7b\x48\xfd\xff\xde\xbe\xb1\x7c\x39\xaf\x1e\xff\xf2\xd3\xfa"
        "\x59\x8f\xcb\x32\x0d\xd7\x3a\x2c\xdb\xcd\xba\xad\x81\x51\xf5\xde\x58"
        "\x5d\xff\x5b\x87\x70\x72\xc3\xf3\xd8\x5a\x7a\x1d\x87\x3e\x1c\x19\x82"
        "\x32\x34\x43\x63\x62\x15\xf3\x35\xfb\x89\x2b\xb9\xfc\x8d\x46\x63\x63"
        "\x4f\x68\x15\x28\x35\x73\x4a\x5f\xfe\x65\x1f\x27\x94\x9d\x7f\xd9\xcb"
        "\xbf\x48\xde\xff\x6f\xbe\x0f\x9f\xf7\xff\x9b\xa7\xe7\xfd\xff\xe6\xe9"
        "\x79\xff\xbf\x79\xfa\x74\xfc\x86\xba\xa5\xe7\xfd\xff\xe6\xcb\x33\xef"
        "\xff\x37\x4f\xbf\x2f\xfb\xdc\xbc\x7f\xe0\x99\x82\xf4\x0f\x17\xa4\xef"
        "\xee\x9c\xde\x3c\x6c\xbf\xbf\x60\xfe\x3d\x05\xe9\x1f\x29\x48\xdf\xd7"
        "\x4c\x3f\xdc\x36\x45\x4a\x7f\xa0\x60\xfe\x07\x0b\xd2\xef\x6d\x4f\xdf"
        "\x92\xa7\x3f\x54\x30\xff\xc7\x0a\xd2\x3f\x5e\x90\xfe\x70\x41\xfa\xa3"
        "\x2d\xe9\xad\x7d\x40\xa7\xf4\x4f\x14\xcc\xbf\xd9\xa5\xe7\x51\xc6\xb5"
        "\xfe\x30\xce\xf2\xe7\xf3\xfc\xfe\x61\x7c\xa4\xeb\x3f\xdd\x7e\xff\x3b"
        "\x0b\xd2\x81\xd1\xf5\xd3\xd7\x0e\x1c\x3d\xf9\x9b\xaf\xd7\x97\x9f\xff"
        "\x9f\x6a\x9e\x0f\x49\xd7\xf1\x8e\xc4\xe1\x5a\x3c\x7e\xfa\x41\x1c\xce"
        "\xaf\x7b\x87\x96\xe1\xc5\xb4\x37\xe3\xf0\x5f\xb3\xf4\x61\x3f\xdf\x01"
        "\xe3\x24\x6f\x3f\x23\xff\x7f\x7f\xa4\x20\x1d\x18\x5d\xe9\x3e\x2f\xbf"
        "\x6f\x18\x43\x95\xad\x9d\x47\xc7\xb8\xa8\xdd\xaa\x6e\xfb\xf9\x8c\x96"
        "\x4f\xc6\xf8\x53\x31\xfe\x74\x8c\x1f\x8b\xf1\x6c\x8c\xf7\xc7\xf8\x40"
        "\x8c\xe7\x06\x54\x3e\x36\xc6\xd1\xd7\x7f\x77\xe8\xa5\xca\xca\xf1\xfe"
        "\xf6\x2c\xbd\xd7\xfb\xc9\xf3\xe7\x81\xda\xda\x89\x0a\x21\xcc\xf7\x58"
        "\x9e\xfc\xfc\x40\xbf\xf7\xb3\xe7\xed\xf8\xf5\x6b\xad\xf9\xaf\xf2\x71"
        "\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x80\xd2\x54\x97\x5e\x17\x16\x66\x2a"
        "\x21\x5c\x7e\xe3\x95\x63\x4f\x9f\x38\xbb\x7f\x71\xcc\xe1\xe6\x14\xf5"
        "\xa5\xd7\xc9\x96\xa1\x5a\x73\xbe\x10\x1e\x8f\xf1\x44\x8c\x7f\x11\xdf"
        "\xdc\xba\xf1\xe2\xe9\xd6\xf8\x76\x8c\x2b\x61\x2e\x54\x42\xa5\x39\x3e"
        "\x3c\x75\xbd\x99\xd3\xdd\x21\x84\x0b\x61\x6f\xb8\x12\xea\x61\xf7\xe5"
        "\xab\x2f\xbf\x35\xf7\xe4\x89\x8b\xc7\x2f\xed\x7b\xfb\xd5\x43\xd7\x36"
        "\x6e\x09\x00\x00\x00\xc0\xe6\xf7\xff\x00\x00\x00\xff\xff\x4b\x58\x09"
        "\xc5",
        2772);
    syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000340, /*flags=*/0,
                    /*opts=*/0x200002c0, /*chdir=*/1, /*size=*/0xad4,
                    /*img=*/0x20000a40);
    break;
  case 2:
    memcpy((void*)0x20000300, "./bus\000", 6);
    syscall(__NR_mkdir, /*path=*/0x20000300ul, /*mode=*/0ul);
    break;
  case 3:
    memcpy((void*)0x20000140, "./bus\000", 6);
    syscall(__NR_chdir, /*dir=*/0x20000140ul);
    break;
  case 4:
    memcpy((void*)0x20000340, "./file1\000", 8);
    syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000340ul,
            /*mode=*/0ul);
    break;
  case 5:
    syscall(__NR_link, /*old=*/0ul, /*new=*/0ul);
    break;
  }
}
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;
}