// https://syzkaller.appspot.com/bug?id=cee4b487f186ee8ce5e370c427cb58c0568e9893
// 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, 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 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, loopfd = -1, 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) {
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    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) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
  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;
retry:
  while (umount2(dir, MNT_DETACH | UMOUNT_NOFOLLOW) == 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, MNT_DETACH | UMOUNT_NOFOLLOW) == 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, MNT_DETACH | UMOUNT_NOFOLLOW))
        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, MNT_DETACH | UMOUNT_NOFOLLOW))
          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")) {
  }
}

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;
  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 (call == 1)
        break;
      event_timedwait(&th->done,
                      50 + (call == 0 ? 4000 : 0) + (call == 2 ? 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 (;;) {
      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);
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    memcpy((void*)0x20000000, "hfsplus\000", 8);
    memcpy((void*)0x20001540,
           "./"
           "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
           251);
    memcpy(
        (void*)0x20000700,
        "\x78\x9c\xec\xdd\xcd\x6b\x1c\xe7\x1d\x07\xf0\xef\xac\x57\xb2\xe5\x82"
        "\xa3\x24\x76\x63\x4a\xa0\x22\x86\xb4\x54\xd4\xd6\x0b\x4a\xab\x5e\xea"
        "\x96\x52\x74\x08\x25\xa4\x87\x9e\x85\xbd\x8e\x17\xaf\x95\x20\x6d\x8a"
        "\x1c\x4a\x51\xdf\xaf\x3d\xe4\x0f\x48\x0f\xba\xf5\x54\xe8\xdd\x90\x9e"
        "\x9b\x5b\xae\x3a\x06\x0a\xbd\xe4\xa4\x9e\x54\x66\x76\x56\x5a\x59\x2f"
        "\x91\xdf\xb4\xab\xf8\xf3\x31\xcf\x3e\xcf\xb3\xcf\xcc\x33\xbf\xf9\xed"
        "\xcc\xec\xce\x0a\xb3\x01\x5e\x58\x4b\xd3\x69\x3e\x4c\x91\xa5\xe9\xb7"
        "\xd7\xcb\xfe\xd6\xe6\x7c\x67\x6b\x73\xfe\x7c\x3d\xdc\x49\x52\xb6\x1b"
        "\x49\xb3\x57\xa5\x58\x49\x8a\x4f\x93\x9b\xe9\x95\x8c\x0d\x4c\x57\x1c"
        "\xb5\x9d\x8f\xdb\x8b\xef\x7e\xfe\xe5\xd6\x17\xbd\x5e\xb3\x2e\xd5\xf2"
        "\x8d\xfd\x53\x3c\x89\x8d\xba\x64\x2a\xc9\xb9\xba\x3e\xe8\xc4\x9b\xd9"
        "\x37\xdf\xad\x23\xe7\x3b\xa9\x62\x37\x33\x65\xc2\xae\x95\xf5\xc6\x53"
        "\x4d\x08\xcf\xc6\xce\x01\x8f\x75\x64\x1e\x79\xbe\x03\x67\x47\xd1\x7b"
        "\xdf\x3c\x60\x32\xb9\x98\xe4\x42\xfd\x39\x20\xf5\xd5\xa1\x71\xba\xd1"
        "\x3d\x7b\xde\x7f\x01\x00\x00\x78\x11\xbc\xb4\x9d\xed\xac\xe7\xd2\xb0"
        "\xe3\x00\x00\x00\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\xb3\xa4\xfe\xfd\xff"
        "\xa2\x2e\x8d\x7e\x7b\x2a\x45\xff\xf7\xff\xc7\xeb\xe7\x52\xb7\xcf\xb4"
        "\x87\xc3\x0e\x00\x00\x00\x00\x00\x00\x00\x00\x9e\x81\x6f\x6f\x67\x3b"
        "\xeb\xb9\xd4\xef\xef\x14\xd5\xdf\xfc\xdf\xa8\x3a\x97\xab\xc7\x6f\xe4"
        "\xc3\xac\xa5\x95\xd5\x5c\xcf\x7a\x96\xd3\x4d\x37\xab\x99\x4d\x32\x39"
        "\x30\xd1\xf8\xfa\x72\xb7\xbb\x3a\x7b\x82\x35\xe7\x0e\x5d\x73\xee\x74"
        "\xf6\x17\x00\x00\x00\x00\x00\x00\x00\xbe\xa6\x7e\x9f\xa5\xbd\xbf\xff"
        "\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0\x28\x28\x92"
        "\x73\xbd\xaa\x2a\x97\xfb\xed\xc9\x34\x9a\x49\x2e\x24\x19\x2f\x97\xdb"
        "\x48\x3e\xeb\xb7\xcf\xb2\x87\xc3\x0e\x00\x00\x00\x00\x4e\xc1\x4b\xdb"
        "\xd9\xce\x7a\x2e\xf5\xfb\x3b\x45\x75\xcf\xff\xcd\xea\xbe\xff\x42\x3e"
        "\xcc\x4a\xba\x69\xa7\x9b\x4e\x5a\xb9\x5d\x7d\x17\xd0\xbb\xeb\x6f\x6c"
        "\x6d\xce\x77\xb6\x36\xe7\xef\x97\xe5\xe0\xbc\x3f\xf9\xef\x63\x85\x51"
        "\xcd\x98\xde\x77\x0f\x87\x6f\xf9\x6a\xb5\xc4\x44\xee\xa4\x5d\x3d\x73"
        "\x3d\xb7\xf2\x7e\x3a\xb9\x9d\x46\xb5\x66\xe9\x6a\x3f\x9e\xc3\xe3\xfa"
        "\x5d\x19\x53\xf1\xe3\xda\x09\x23\xbb\x5d\xd7\xe5\x9e\xff\xb5\xae\x47"
        "\xc3\x64\x95\x91\xb1\xdd\x8c\xcc\xd4\xb1\x95\xd9\x78\xf9\xf8\x4c\x3c"
        "\xe6\xab\xf3\xe8\x96\x66\xd3\xd8\xfd\xe6\xe7\xf2\x73\xc8\xf9\xc5\xba"
        "\x2e\xf7\xe7\xcf\x23\x9d\xf3\xb9\xfa\xe8\xfb\xac\x3c\x67\x8e\xcf\x44"
        "\xf2\x9d\x7f\xfe\xfd\x57\x77\x3b\x2b\xf7\xee\xde\x59\x9b\x1e\x9d\x5d"
        "\x7a\x42\x8f\x66\x62\x7e\xe0\x3c\x7c\xed\x85\xca\xc4\x4c\x95\x89\x2b"
        "\xbb\xfd\xa5\xfc\x3c\xbf\xcc\x74\xa6\xf2\x4e\xfe\xb7\xd3\xd3\x4d\x2b"
        "\x53\xf9\x59\x96\xd3\xcd\x72\x7d\x3c\x97\x8f\x93\xc7\x67\xea\xe6\xbe"
        "\xde\x3b\x5f\x15\xc9\x78\xfd\xba\xf4\xae\xa2\x47\xc5\xb4\x9a\x76\x7e"
        "\x5d\x45\x32\x18\xd3\x1b\xd5\xba\x97\xd2\xce\x2f\xf2\x7e\x6e\xa7\x95"
        "\xb7\xaa\x7f\x73\x99\xcd\x0f\xb2\x90\x85\x2c\x0e\xbc\xc2\x57\x4e\x70"
        "\xd6\x37\x1e\xef\xac\xbf\xf6\xdd\xba\x31\x91\xe4\x2f\x75\x3d\x1a\xca"
        "\xbc\xbe\x3c\x90\xd7\xc1\x6b\xee\x64\x35\x36\xf8\xcc\x5e\x96\x5e\x39"
        "\x3a\x4b\xc5\x13\x5e\x1b\x9b\xdf\xaa\x1b\xe5\x36\xfe\x50\xd7\xa3\xe1"
        "\xd1\x4c\xcc\x0e\x64\xe2\xd5\xe3\x8f\x97\xbf\xed\x94\x8f\x6b\x9d\x95"
        "\x7b\xab\x77\x97\x3f\x38\xe1\xf6\xde\xac\xeb\x32\x95\x7f\x1a\xa9\x77"
        "\x89\xf2\x78\x79\xa5\x7c\xb1\xaa\xde\xfe\xa3\xa3\x1c\x7b\xf5\xd0\xb1"
        "\xd9\x6a\xec\xf2\xee\x58\xe3\xc0\xd8\x95\xdd\xb1\xaf\x3a\x53\xc7\xeb"
        "\xcf\x70\x07\x67\x9a\xab\xc6\x5e\x3b\x74\x6c\xbe\x1a\xbb\x3a\x30\x76"
        "\xd8\xe7\x2d\x00\x46\xde\xc5\xef\x5d\x1c\x9f\xf8\xcf\xc4\xbf\x27\x3e"
        "\x99\xf8\xe3\xc4\xdd\x89\xb7\x2f\xfc\xf4\xfc\x0f\xcf\xbf\x3e\x9e\xb1"
        "\x7f\x8d\xfd\xa8\x39\x73\xee\xcd\xc6\xeb\xc5\x3f\xf2\x49\x7e\xbb\x77"
        "\xff\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x3c\xb9\xb5\x07\x3b\xf7\x96\x3b\x9d"
        "\xd6\xea\xda\x83\x8f\x86\xd9\x28\xea\x1f\xf2\x19\x6a\x18\xcd\x21\x27"
        "\x61\xa4\x1a\xf5\x01\xb2\x31\x2a\xf1\x68\x9c\x6e\x63\xc8\x17\x26\xe0"
        "\xb9\xbb\xd1\xbd\xff\xc1\x8d\xb5\x07\x1f\x7d\xbf\x7d\x7f\xf9\xbd\xd6"
        "\x7b\xad\x95\xb1\x85\x85\xc5\x99\xc5\x85\xb7\xe6\x6f\xdc\x69\x77\x5a"
        "\x33\xbd\xc7\x61\x47\x09\x3c\x0f\x7b\x6f\xfa\xc3\x8e\x04\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x38\xa9\xd3\xf8\xef\x04\xc3\xde\x47\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\xe0\x6c\x5b\x9a\x4e\xf3\x61\x8a\xcc\xce\x5c\x9f\x29"
        "\xfb\x5b\x9b\xf3\x9d\xb2\xf4\xdb\x7b\x4b\x36\x93\x34\x92\x14\xbf\x49"
        "\x8a\x4f\x93\x9b\xe9\x95\x4c\x0e\x4c\x57\x1c\xb5\x9d\x8f\xdb\x8b\xef"
        "\x7e\xfe\xe5\xd6\x17\x7b\x73\x35\xfb\xcb\x37\x8e\x5b\xef\x50\x63\x8f"
        "\x3e\xb1\x51\x97\x4c\x25\x39\x57\xd7\x4f\x61\xdf\x7c\xb7\x9e\x7a\xbe"
        "\x62\x77\x0f\xcb\x84\x5d\xeb\x27\x0e\x86\xed\xff\x01\x00\x00\xff\xff"
        "\x16\x46\x0e\x9a",
        1534);
    res = -1;
    res = syz_mount_image(/*fs=*/0x20000000, /*dir=*/0x20001540, /*flags=*/0,
                          /*opts=*/0x20000040, /*chdir=*/1, /*size=*/0x5fe,
                          /*img=*/0x20000700);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    memcpy((void*)0x20000080,
           "./"
           "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
           "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
           251);
    syscall(__NR_mknodat, /*dirfd=*/0xffffff9c, /*file=*/0x20000080ul,
            /*mode=*/0ul, /*dev=*/0x103);
    break;
  case 2:
    memcpy((void*)0x20000180, "msdos\000", 6);
    memcpy((void*)0x200006c0, ".\000", 2);
    *(uint32_t*)0x200001c0 = -1;
    *(uint32_t*)0x200001c4 = -1;
    sprintf((char*)0x200001c8, "%020llu", (long long)-1);
    *(uint64_t*)0x200001dc = -1;
    *(uint8_t*)0x200001e4 = r[0];
    sprintf((char*)0x200001e5, "%023llo", (long long)r[0]);
    memcpy(
        (void*)0x200001fc,
        "\x6c\x62\x5a\xe8\x09\x00\x00\x00\x00\x00\x00\x00\xd7\x88\xaf\xc4\xb6"
        "\xb6\x90\x9e\xf3\xcb\x48\x7e\x1f\xd7\x90\x61\x1d\x1b\x8a\xff\x2a\xa4"
        "\x4f\xe4\xbd\xd1\x93\x3c\x0b\x35\x5e\xbb\x53\xe2\x75\xcc\xcb\xfc\x1e"
        "\x73\x1e\x25\x25\xb4\x0a\x8e\x2f\xc4\x96\x45\x61\x6f\x66\xaf\x80\xdf"
        "\x6d\xc5\xdf\x9a\xee\x17\xd0\x2b\x7e\x61\x21\x5b\x88\xb7\x17\x0a\xc5"
        "\x74\x35\xb7\x42\x91\x74\xb1\x98\xd2\xae\xe6\x92\xc0\x7e\x98\x92\xb5"
        "\xe2\x1d\xa6\xd0\xb3\x23\xef\xd0\x61\xb7\x0b\x43\xaa\x92\xfc\xcf\x24"
        "\xbf\x92\x6e\x9c\x2d\xb4\xdb\x9d\xa8\x57\x06\x3f\x95\xe2\xd2\x6d\xe0"
        "\x78\x8d\x19\xa4\xf0\x65\x47\x79\x7c\xfc\x14\x73\x95\x4c\x3d\x7e\xc3"
        "\xa4\x58\x3b\x4e\x90\x86\x19\xa1\x0a\x2f\x92\xee\xbe\xe7\x74\xc8\xf8"
        "\x2a\x75\xca\xb5\x86\x0b\xdd\x49\x44\x5d\x2e\x33\x73\x0a\xdb\x6a\x52"
        "\xe0\x78\x8a\xa2\x4b\x42\x67\xb4\x17\xd2\x50\x50\x22\xd6\x96\xdd\x4a"
        "\x70\xb3\x0a\xce\x66\xcb\xa3\x48\x6c\x8d\xf5\xcb\xf4\x37\xd2\xed\x22"
        "\x66\x55\x8f\xab\xf1\xa3\xf8\x83\x10\x32\xa9\x15\xa1\xeb\xc0\xa0\xc6"
        "\x4e\x62\x3b\x1a\x81\x4d\xa7\xa2\x2e\x65\x6f\x0a\xcc\xb0\x75\xd1\x0b"
        "\x70\x17\xa7\x67\xca\xc5\xad\x30\x4a\xd5\x8a\xa8\x1f\xe2\x2f\xfa\x16"
        "\x75\xb1\x11\x5e\x72\x15\xf0\x4e\x5d\xd4\xa8\xe8\x5a\x6a\xda\xea\xa7"
        "\xa9\x92\x58\x53\x91\x6a\x25\x60\x32\x92\x88\x22\x55\x5d\xa9\x58\x4e"
        "\xff\x89\x6e\x33\x50\xba\x61\x75\x48\x5d\x32\x83\x1c\xaa\x60\x9e\xa5"
        "\x74\xc6\x7c\x9e\x5a\xdc\xb3\x04\xb1\x65\x03\x6c\x44\xbf\x25\x2c\xfe"
        "\xbd\x22\x10\x33\x15\xf3\xf0\xf0\xf0\xe6\xa2\x63\xbf\x1e\xfe\xc5\x53"
        "\x5c\x5f\x43\xec\x7d\x39\xbf\xaf\x49\x58\xfe\xf9\xc2\x9e\x44\x37\x2d"
        "\x1d\x42\x2e\xec\x76\x76\x4f\x47\x65\xb9\x92\x57\x22\x32\xbd\x76\xc3"
        "\x25\x97\x33\x1b\xad\xe9\x77\x83\x30\x22\x73\x65\xe3\xc0\x80\x76\xd0"
        "\x1c\x5b\x68\x77\x22\xda\xc3\x59\xe1\x72\x42\xa8\xcf\xa5\xb3\xdd\x5c"
        "\x13\x2f\x15\x81\x31\x1e\x63\xe7\xc0\x85\xa3\xb7\x70\xa4\x98\xce\x20"
        "\xea\x7c\x4f\x9f\x57\x52\xfa\x1e\x2f\xdc\x51\xf5\xdc\xfe\x70\x2d\x65"
        "\xe5",
        460);
    sprintf((char*)0x200003c8, "%023llo", (long long)-1);
    sprintf((char*)0x200003df, "0x%016llx", (long long)r[0]);
    *(uint16_t*)0x200003f1 = -1;
    syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x200006c0, /*flags=*/0x1a424ac,
                    /*opts=*/0x200001c0, /*chdir=*/1, /*size=*/0,
                    /*img=*/0x20000d00);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  use_temporary_dir();
  loop();
  return 0;
}