// https://syzkaller.appspot.com/bug?id=4b5b6bdc090752dbcdd7e220a4703fed752cdfe7
// 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 < 9; 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 == 0 ? 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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    memcpy((void*)0x200000c0, "nilfs2\000", 7);
    memcpy((void*)0x200001c0, "./file2\000", 8);
    *(uint32_t*)0x20000000 = 0;
    memcpy(
        (void*)0x200026c0,
        "\x78\x9c\xec\xdd\x4d\x6c\x1c\x57\x01\x00\xe0\x37\x6b\xaf\x1d\x37\x2d"
        "\xd9\x94\x84\x98\x34\xb4\x09\x85\xb6\xfc\xd4\x6e\x1c\x13\x7e\x22\x68"
        "\xaa\xe6\x42\x68\x2a\x6e\x95\x2a\x2e\x51\x92\x96\x08\x37\x20\x52\xa9"
        "\xb4\xea\x21\xc9\x89\x1b\xad\xaa\x70\xe5\x47\x9c\x7a\xa9\x00\x21\xd1"
        "\x0b\x8a\x7a\xe2\x52\x89\x46\xe2\xd2\x53\xe1\xc0\x81\x28\x48\x95\x38"
        "\x40\x21\x31\xb2\xfd\xde\xfe\x3c\xef\x32\xbb\x8e\xd7\xe3\xb5\xbf\x4f"
        "\x7a\x7e\xfb\xe6\xcd\xce\x7b\xb3\x9e\x99\x9d\x9d\x99\xf7\x5e\x00\xb6"
        "\xad\xda\xf2\xdf\xf9\xf9\xe9\x22\x84\xab\x6f\xbf\x71\xe2\xef\x0f\xfd"
        "\x6d\x6a\x69\xca\xe3\xcd\x39\x1a\xcb\x7f\xc7\xdb\x52\xf5\x10\x42\x11"
        "\xd3\xe3\xd9\xf2\x3e\x18\x5b\x89\x6f\x7d\xf8\xea\x99\x6e\x71\x11\xe6"
        "\x96\xff\xa6\x74\x78\xfa\x66\xf3\xbd\x3b\x43\x08\x97\xc2\xc1\x70\x2d"
        "\x34\xc2\xfe\xab\xd7\x5f\x7f\x77\xee\xa9\x53\x97\x4f\x5e\x39\xf4\xde"
        "\x9b\xc7\x6e\x0c\x67\xed\x01\x00\x60\x7b\xf9\xf6\xb5\x63\xf3\x7b\xff"
        "\xf2\xa7\xfb\x76\x7f\xf4\xd6\xfd\xc7\xc3\x64\x73\x7a\x3a\x3f\x6f\xc4"
        "\xf4\xdd\xf1\xbc\xff\x78\x3c\xf1\x4f\xe7\xff\xb5\xd0\x99\x2e\xda\x42"
        "\xbb\x89\x6c\xbe\xf1\x18\x6a\xd9\x7c\x63\x5d\xe6\x6b\x2f\xa7\x9e\xcd"
        "\x37\xde\xa3\xfc\x89\x6c\xb9\xf5\x1e\xf3\x4d\x96\x94\x3f\xd6\x36\xad"
        "\xdb\x7a\xc3\x28\x4b\xdb\x71\x23\x14\xb5\x99\x8e\x74\xad\x36\x33\xb3"
        "\xf2\x9b\x3c\x2c\xff\xae\x9f\x28\x66\x2e\x9c\x5f\x78\xee\x62\x45\x15"
        "\x05\xd6\xdd\x3f\x1f\x08\x21\x1c\x14\x84\xc1\xc2\xf1\x50\x7d\x1d\x84"
        "\x3b\x0f\xf9\x79\x3a\x40\x55\xf2\xfb\x85\xab\x5c\x5a\xdf\x23\x56\x73"
        "\x69\xe3\xfd\x95\x7f\xf3\x89\x5a\xf7\xf7\xf7\x2d\xbf\xe2\x00\x2d\xf9"
        "\xf6\xb7\x98\x6f\x2e\xeb\xbc\xfd\x97\x95\xbf\x8a\xf2\x2b\x2d\xff\x57"
        "\x97\x9d\xb1\xb1\x7e\x06\xde\x9a\xbe\x34\x9c\x7a\xac\xb7\xb4\x5e\x69"
        "\x3f\xba\x3b\xa6\xf3\xfb\x08\xf9\xf3\x4b\x83\xee\xff\x69\x79\xf9\xfd"
        "\x88\x7a\x9f\xf5\xec\x75\x1f\x61\x54\xee\x2f\xf4\xaa\xe7\xd8\x06\xd7"
        "\x63\xad\x7a\xd5\x3f\xdf\x2e\xb6\xaa\xaf\xc7\xb8\x16\x77\x99\x6f\x64"
        "\xf9\xed\xfb\x4f\xfe\x3f\x1d\x95\xff\x31\xd0\xdd\xbf\x46\xfe\xfa\xff"
        "\x8e\x4d\x50\x07\x41\xd8\xc4\xe1\x72\xef\xbc\xc5\xaa\x0f\x40\xc0\xa6"
        "\x95\x3f\x37\xb7\x18\xa5\xfc\xfc\xb9\xbe\x3c\x7f\xb2\x24\x7f\x47\x49"
        "\xfe\x54\x49\xfe\x5d\x25\xf9\x3b\x4b\xf2\x61\x3b\xfb\xed\x8b\x3f\x09"
        "\xaf\x15\xad\xdf\xf9\xf9\x6f\xfa\x41\xaf\x87\xa5\xeb\x6c\xf7\xc4\xf8"
        "\x63\xe5\x55\x28\x7a\x26\xd6\x50\x7e\xfe\xdc\xef\xa0\xee\xb4\x7c\x77"
        "\xf7\x18\x25\xbf\x3f\xfd\xcc\xb9\xaf\x9c\x7d\xf6\xfa\xca\xf3\xff\x45"
        "\x73\xfb\xbf\x1d\xb7\xf7\x83\x31\xdd\x88\xfb\xd6\xb5\x38\x43\xba\x6e"
        "\x9a\x5f\x57\x6f\x3e\xfb\xdf\xe8\x2c\xa7\xd6\x63\xbe\x7b\xb3\xfa\xdc"
        "\xd3\x65\xfe\xe5\xd7\x7b\x3a\xe7\x2b\xf6\xb4\x96\x13\xda\x8e\x33\xab"
        "\xea\x31\xdd\xf9\xbe\x5d\xbd\xe6\x3b\xd0\x39\xdf\x4a\xf5\x5b\x57\xf1"
        "\xa7\x62\xd8\x91\xd5\x37\x3f\x3f\xb9\x2b\x5b\x7e\x3a\xff\x48\xc7\xd5"
        "\xf4\x79\x8d\x67\xeb\x5b\xcf\xd6\x63\xa2\xa3\x1e\xad\xe3\xca\xee\x18"
        "\xe7\xf5\x80\xb5\x48\xdb\x63\xaf\xe7\xff\xd3\xf6\x39\x1d\xea\xc5\x73"
        "\xe7\x17\xce\x3d\x16\xd3\x69\x3b\xfd\xe3\x58\x7d\x72\x69\xfa\xe1\x0d"
        "\xae\x37\x70\xe7\xfa\x6d\xff\x33\x1d\x3a\xda\xff\x34\x4f\x73\xa7\x43"
        "\xbd\xd6\x7e\x5c\xd8\xd5\x9a\x5e\xb4\x1f\x17\x1a\xd9\xf4\xb9\x1e\xd3"
        "\x8f\xc4\x74\xfa\x9e\xfb\xee\xd8\xd4\xf2\xf4\x99\x33\xdf\x5f\x38\xbb"
        "\xde\x2b\x0f\xdb\xdc\xc5\x97\x5f\xf9\xde\xe9\x85\x85\x73\x3f\xf4\xa2"
        "\xc7\x8b\xa5\x33\xf7\x4d\x50\x0d\x2f\xbc\xd8\xd0\x17\x55\x1f\x99\x80"
        "\x61\x9b\x7d\xf1\x85\x1f\xcc\x5e\x7c\xf9\x95\x47\xcf\xbf\x70\xfa\xf9"
        "\x73\xcf\x9f\xbb\x70\xe4\xe8\xd1\x23\x73\x73\x47\xbf\x7a\x64\x7e\x76"
        "\xf9\xbc\x7e\xb6\xfd\xec\x1e\xd8\x4a\x5a\x5f\xfa\x55\xd7\x04\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\xe8\xd7\x4b\x27\x4f\x5c\xff\xf3\x3b\x5f"
        "\x7e\x7f\xa5\xfd\x7f\xab\xfd\x5f\x6a\xff\x9f\x9e\xfc\x4d\xed\xff\x7f"
        "\x9c\xb5\xff\x4f\xed\xf7\xf2\x71\x00\x53\x3b\xc0\xdd\xb1\x85\xfc\xaa"
        "\xf6\xf6\x59\x07\xab\x13\xd9\x72\xea\x3d\x5a\xb8\xef\xc9\xca\xd9\x9b"
        "\xbd\xef\x13\x31\x6e\x8e\xe3\x17\xdb\xff\xa7\xe2\xf2\x7e\x5d\x53\x7d"
        "\xf6\x65\xef\xcb\xfb\xef\x4d\xf3\x65\xdd\x09\xac\xea\x2f\x65\x22\xeb"
        "\x83\x24\x1f\x2f\xf0\xd3\x31\xbe\x12\xe3\x5f\x76\x5b\x49\xd8\x28\xc5"
        "\x54\xf7\xc9\x31\x2e\xeb\xdf\x3a\x6d\xeb\xa9\x41\xb0\x7e\x29\x46\x53"
        "\xfa\xbf\xa5\xad\x21\xf5\x63\x92\xda\x7f\x97\xf5\xeb\xb4\x7b\xc8\xf5"
        "\x63\x38\x36\xa2\x39\x61\xd5\xeb\x08\x74\xf7\x8f\x75\xea\xff\x7b\xf9"
        "\x3c\xa1\xea\x7e\x8e\x85\x0a\xc3\x54\xf5\x75\xa8\x57\xfd\x19\x8c\x5e"
        "\x58\x5c\x34\x8a\x07\xb0\x39\x54\x3d\xfe\x67\xba\xee\x99\xe2\x0b\x7f"
        "\xf8\xe6\x8e\xa5\x90\x66\xbb\xf9\x44\xe7\xf1\x32\xef\xbf\x14\xee\xc4"
        "\x66\x1f\x7f\x52\xf9\x5b\x6b\xfc\xcf\xe6\xf8\x77\x7d\x1f\xff\xb2\x11"
        "\xf3\x1a\x6b\x2b\xf7\xdf\x3f\xbb\xf1\x7e\x5b\xb1\x61\x7f\xbf\xe5\xe7"
        "\xeb\x9f\xfa\x81\xde\x33\x58\xf9\x1f\xc5\xf2\xd3\xda\x3c\x1c\xfa\x2b"
        "\x7f\xf1\x17\x59\xf9\xf9\x0d\xa1\x3e\xfd\x27\x2b\xff\xae\x3e\xcb\x5f"
        "\xb5\xfe\x07\xd6\x56\xfe\x7f\x63\xf9\xe9\x63\x7b\xe4\xc1\x7e\xcb\x5f"
        "\xa9\x71\x51\xeb\xac\x47\xc7\x75\xe3\xb6\x41\x36\xf2\xeb\xc6\xc9\xad"
        "\x6c\xfd\xcf\xae\x75\xfd\xd7\x38\x50\xe3\xed\x58\x3e\x6c\x67\xa3\x32"
        "\xce\xec\x40\x8a\xd1\x19\xff\xb7\x97\xfc\x39\x8c\x34\xec\x72\x3a\x10"
        "\xa6\xe7\x1c\xf2\xf1\x4e\x06\xad\xff\xc7\x63\x9c\xbe\x07\xf6\x66\xcb"
        "\x2f\x4a\xbe\xdf\x8c\xff\x3b\xda\xbe\x16\xe3\xb2\xfd\x21\x8d\xff\x9b"
        "\xb6\xc7\x46\x97\x74\xad\x2d\x5d\xef\xf2\xd9\x6e\xc9\x63\x0d\x8c\xb0"
        "\x0f\x46\x7e\xfc\xdf\x0d\x0c\xc5\x50\x96\x7b\x6b\x43\xd7\x61\x71\xb2"
        "\xfa\xcf\x51\xd8\x34\x61\x71\x71\x71\xb8\x17\xb4\x4a\x54\x5a\x38\x95"
        "\x7f\xfe\x55\xff\x4e\xa8\xba\xfc\xc1\x3e\xff\x8d\xaf\x6d\x3e\xfe\x6f"
        "\x7e\x0e\x9f\x8f\xff\x9b\xe7\xe7\xe3\xff\xe6\xf9\xf9\xf8\xbf\x79\x7e"
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        "\x74\x7e\xdf\x3b\xb4\xa5\x97\xf2\xde\x89\xe9\xbf\x66\xf9\x55\x5f\x6f"
        "\x02\x5a\xf2\xfe\x33\xf2\xef\xf7\x87\x4b\xf2\x81\xd1\x95\x9e\xf3\xb2"
        "\x7f\xc3\x36\x54\x74\xef\xb1\xa7\xdf\x7e\xab\x7a\x9d\xe7\x33\x5a\x3e"
        "\x1f\xe3\x2f\xc4\xf8\x8b\x31\x7e\x34\xc6\x33\x31\x9e\x8d\xf1\xe1\x18"
        "\xcf\x6d\x50\xfd\x18\x8e\x27\x7f\xfd\xbb\x63\xaf\x15\xad\xdf\xfb\xbb"
        "\xb2\xfc\x7e\x9f\x27\xcf\xdb\x03\xe5\xfd\x44\x1d\xe9\xb3\x3e\xf9\xf5"
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        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x2a\x53\x5b\xfe\x3b\x3f\x3f\x5d\x84\x70\xf5\xed"
        "\x37\x4e\x3c\x73\xea\xfc\xec\xd2\x94\xc7\x9b\x73\x34\x96\xff\x8e\xb7"
        "\xa5\xea\xcd\xf7\x85\xf0\x58\x8c\xc7\x62\xfc\xf3\xf8\xe2\xd6\x87\xaf"
        "\x9e\x69\x8f\x6f\xc7\xb8\x08\x73\xa1\x08\x45\x73\x7a\x78\xfa\x66\xb3"
        "\xa4\x9d\x21\x84\x4b\xe1\x60\xb8\x16\x1a\x61\xff\xd5\xeb\xaf\xbf\x3b"
        "\xf7\xd4\xa9\xcb\x27\xaf\x1c\x7a\xef\xcd\x63\x37\x86\xf7\x09\x00\x00"
        "\x00\xc0\xd6\xf7\xbf\x00\x00\x00\xff\xff\x9a\x8e\x14\xe4",
        2649);
    syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x200001c0, /*flags=*/0x800000,
                    /*opts=*/0x20000000, /*chdir=*/1, /*size=*/0xa59,
                    /*img=*/0x200026c0);
    break;
  case 1:
    memcpy((void*)0x20000000, "./bus\000", 6);
    syscall(__NR_open, /*file=*/0x20000000ul, /*flags=*/0x60142ul,
            /*mode=*/0ul);
    break;
  case 2:
    memcpy((void*)0x20007f80, "./bus\000", 6);
    res = syscall(__NR_open, /*file=*/0x20007f80ul, /*flags=*/0x145142ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    syscall(__NR_ftruncate, /*fd=*/r[0], /*len=*/0x2007ffbul);
    break;
  case 4:
    memcpy((void*)0x20000180, "./file2\000", 8);
    syscall(__NR_open, /*file=*/0x20000180ul, /*flags=*/0ul, /*mode=*/0ul);
    break;
  case 5:
    memcpy((void*)0x20000000, "./bus\000", 6);
    res = syscall(__NR_open, /*file=*/0x20000000ul, /*flags=*/0x60142ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 6:
    memcpy((void*)0x20007f80, "./bus\000", 6);
    res = syscall(__NR_open, /*file=*/0x20007f80ul, /*flags=*/0x145142ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    syscall(__NR_sendfile, /*fdout=*/r[1], /*fdin=*/r[2], /*off=*/0ul,
            /*count=*/0x1000000201005ul);
    break;
  case 8:
    syscall(__NR_ftruncate, /*fd=*/r[1], /*len=*/0x8000ul);
    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);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}