// https://syzkaller.appspot.com/bug?id=012e084e0fb9760cb6c3aa267e2a835652ab40cb
// 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 < 8; 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*)0x20000240 = 0;
    memcpy(
        (void*)0x20000c40,
        "\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\x88\x34\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\x59\xe4\xf5\x7b\xfb\xf3\xbc\xcb\xec\x3a\x59\xaf\xd7\xfb\x7d"
        "\xd2\xf3\xdb\x37\x6f\x76\xde\x9b\xf5\xcc\xec\xec\xcc\xbc\xf7\x02\x30"
        "\xb1\x2a\x8d\xbf\xcb\xcb\xf3\x45\x08\x57\xde\x7e\xe3\xd8\xdf\x1f\xfa"
        "\xdb\xdc\xca\x94\xc7\x9b\x73\xd4\x1a\x7f\xa7\xdb\x52\xd5\x10\x42\x11"
        "\xd3\xd3\xd9\xf2\x3e\x98\x5a\x8d\x6f\x7e\xf8\xea\xa9\x6e\x71\x11\x96"
        "\x1a\x7f\x53\x3a\x3c\x7d\xa3\xf9\xde\xed\x21\x84\x8b\x61\x7f\xb8\x1a"
        "\x6a\x61\xef\x95\x6b\xaf\xbf\xbb\xf4\xd4\x89\x4b\xc7\x2f\x1f\x78\xef"
        "\xcd\x23\xd7\x87\xb3\xf6\x00\x00\x30\x59\xbe\x7d\xf5\xc8\xf2\xee\xbf"
        "\xfc\xe9\xbe\x9d\x1f\xbd\x75\xff\xd1\x30\xdb\x9c\x9e\xce\xcf\x6b\x31"
        "\x7d\x77\x3c\xef\x3f\x1a\x4f\xfc\xd3\xf9\x7f\x25\x74\xa6\x8b\xb6\xd0"
        "\x6e\x26\x9b\x6f\x3a\x86\x4a\x36\xdf\x54\x97\xf9\xda\xcb\xa9\x66\xf3"
        "\x4d\xf7\x28\x7f\x26\x5b\x6e\xb5\xc7\x7c\xb3\x25\xe5\x4f\xb5\x4d\xeb"
        "\xb6\xde\x30\xce\xd2\x76\x5c\x0b\x45\x65\xa1\x23\x5d\xa9\x2c\x2c\xac"
        "\xfe\x26\x0f\x8d\xdf\xf5\x33\xc5\xc2\xf9\xb3\xe7\x9e\xbb\x30\xa2\x8a"
        "\x02\x77\xdc\x3f\x1f\x08\x21\xec\x17\x84\xc1\xc2\xd1\x30\xfa\x3a\x08"
        "\xb7\x1f\xea\x3b\x46\x7d\x04\x02\x58\x95\xdf\x2f\x5c\xe3\x62\x7e\x65"
        "\xe1\xf6\x34\x97\x36\xdd\x5f\xf9\x37\x9e\xa8\x74\x7f\x7f\xdf\xf2\x2b"
        "\x0e\xd0\x92\x6f\x7f\xf5\x7c\x73\xb9\xc3\xdb\x7f\x59\xf9\x6b\x28\x7f"
        "\xa4\xe5\xff\xea\xd2\x70\xcb\x67\xb2\x0c\xbc\x35\x7d\x69\x38\xf5\xb8"
        "\xd3\xd2\x7a\xa5\xfd\xe8\xee\x98\xce\xef\x23\xe4\xcf\x2f\x0d\xba\xff"
        "\xa7\xe5\xe5\xf7\x23\xaa\x7d\xd6\xb3\xd7\x7d\x84\x71\xb9\xbf\xd0\xab"
        "\x9e\x53\x1b\x5c\x8f\xf5\xea\x55\xff\x7c\xbb\xd8\xaa\xbe\x1e\xe3\x4a"
        "\xdc\x65\xbe\x91\xe5\xb7\xef\x3f\xf9\xff\x74\x5c\xfe\xc7\x40\x77\xff"
        "\x1a\xfb\xeb\xff\xdb\x36\x41\x1d\x04\x61\x13\x87\x4b\xbd\xf3\xea\xa3"
        "\x3e\x00\x01\x9b\x56\xfe\xdc\x5c\x3d\x4a\xf9\xf9\x73\x7d\x79\xfe\x6c"
        "\x49\xfe\xb6\x92\xfc\xb9\x92\xfc\xbb\x4a\xf2\xb7\x97\xe4\xc3\x24\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\x51\x7e\xfe\xdc\xef\xa0"
        "\x6e\xb7\x7c\x77\xf7\x18\x27\xbf\x3f\xf9\xcc\x99\xaf\x9c\x7e\xf6\xda"
        "\xea\xf3\xff\x45\x73\xfb\xbf\x15\xb7\xf7\xfd\x31\x5d\x8b\xfb\xd6\xd5"
        "\x38\x43\xba\x6e\x9a\x5f\x57\x6f\x3e\xfb\x5f\xeb\x2c\xa7\xd2\x63\xbe"
        "\x7b\xb3\xfa\xdc\xd3\x65\xfe\xc6\xeb\x5d\x9d\xf3\x15\xbb\x5a\xcb\x09"
        "\x6d\xc7\x99\x35\xf5\x98\xef\x7c\xdf\x8e\x5e\xf3\xed\xeb\x9c\x6f\xb5"
        "\xfa\xad\xab\xf8\x73\x31\x6c\xcb\xea\x9b\x9f\x9f\xdc\x95\x2d\x3f\x9d"
        "\x7f\xa4\xe3\x6a\xfa\xbc\xa6\xb3\xf5\xad\x66\xeb\x31\xd3\x51\x8f\xd6"
        "\x71\x65\x67\x8c\xf3\x7a\xc0\x7a\xa4\xed\xb1\xd7\xf3\xff\x69\xfb\x9c"
        "\x0f\xd5\xe2\xb9\xb3\xe7\xce\x3c\x16\xd3\x69\x3b\xfd\xe3\x54\x75\x76"
        "\x65\xfa\xc1\x0d\xae\x37\x70\xfb\xfa\x6d\xff\x33\x1f\x3a\xda\xff\x34"
        "\x4f\x73\xe7\x43\xb5\xd2\x7e\x5c\xd8\xd1\x9a\x5e\xb4\x1f\x17\x6a\xd9"
        "\xf4\xa5\x1e\xd3\x0f\xc5\x74\xfa\x9e\xfb\xee\xd4\x5c\x63\xfa\xc2\xa9"
        "\xef\x9f\x3b\x7d\xa7\x57\x1e\x26\xdc\x85\x97\x5f\xf9\xde\xc9\x73\xe7"
        "\xce\xfc\xd0\x8b\x1e\x2f\x56\xce\xdc\x37\x41\x35\xbc\xf0\x62\x43\x5f"
        "\x8c\xfa\xc8\x04\x0c\xdb\xe2\x8b\x2f\xfc\x60\xf1\xc2\xcb\xaf\x3c\x7a"
        "\xf6\x85\x93\xcf\x9f\x79\xfe\xcc\xf9\x43\x87\x0f\x1f\x5a\x5a\x3a\xfc"
        "\xd5\x43\xcb\x8b\x8d\xf3\xfa\xc5\xf6\xb3\x7b\x60\x2b\x69\x7d\xe9\x8f"
        "\xba\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\xbf\x5e\x3a\x7e\xec"
        "\xda\x9f\xdf\xf9\xf2\xfb\xab\xed\xff\x5b\xed\xff\x52\xfb\xff\xf4\xe4"
        "\x6f\x6a\xff\xff\xe3\xac\xfd\x7f\x6a\xbf\x97\x8f\x03\x98\xda\x01\xee"
        "\x8c\x2d\xe4\xd7\xb4\xb7\xcf\x3a\x58\x9d\xc9\x96\x53\xed\xd1\xc2\x7d"
        "\x57\x56\xce\xee\xec\x7d\x9f\x88\x71\x73\x1c\xbf\xd8\xfe\x3f\x15\x97"
        "\xf7\xeb\x9a\xea\xb3\x27\x7b\x5f\xde\x7f\x6f\x9a\x2f\xeb\x4e\x60\x4d"
        "\x7f\x29\x33\x59\x1f\x24\xf9\x78\x81\x9f\x8e\xf1\xe5\x18\xff\xb2\xdb"
        "\x4a\xc2\x46\x29\xe6\xba\x4f\x8e\x71\x59\xff\xd6\x69\x5b\x4f\x0d\x82"
        "\xf5\x4b\x31\x9e\xd2\xff\x2d\x6d\x0d\xa9\x1f\x93\xd4\xfe\xbb\xac\x5f"
        "\xa7\x9d\x43\xae\x1f\xc3\xb1\x11\xcd\x09\x47\xbd\x8e\x40\x77\xff\xb8"
        "\x43\xfd\x7f\x37\xce\x13\x46\xdd\xcf\xb1\x30\xc2\x30\xb7\x09\xea\x20"
        "\x0c\x1a\xea\x75\xa3\x78\x00\x9b\xc3\xa8\xc7\xff\x4c\xd7\x3d\x53\x7c"
        "\xfe\x0f\xdf\xdc\xb6\x12\xd2\x6c\x37\x9e\xe8\x3c\x5e\xe6\xfd\x97\xc2"
        "\xed\xd8\xec\xe3\x4f\x2a\x7f\x6b\x8d\xff\xd9\x1c\xff\xae\xef\xe3\x5f"
        "\x36\x62\x5e\x6d\x7d\xe5\xfe\xfb\x67\xd7\xdf\x6f\x2b\x36\xec\xed\xb7"
        "\xfc\x7c\xfd\x53\x3f\xd0\xbb\x06\x2b\xff\xa3\x58\x7e\x5a\x9b\x87\x43"
        "\x7f\xe5\xd7\x7f\x91\x95\x9f\xdf\x10\xea\xd3\x7f\xb2\xf2\xef\xea\xb3"
        "\xfc\x35\xeb\xbf\x6f\x7d\xe5\xff\x37\x96\x9f\x3e\xb6\x47\x1e\xec\xb7"
        "\xfc\xd5\x1a\x17\x95\xce\x7a\x74\x5c\x37\x6e\x1b\x64\x23\xbf\x6e\x9c"
        "\xdc\xcc\xd6\xff\xf4\x7a\xd7\x7f\x9d\x03\x35\xde\x8a\xe5\xc3\x24\x1b"
        "\x97\x71\x66\x07\x52\x8c\xcf\xf8\xbf\xbd\xe4\xcf\x61\xa4\x61\x97\xd3"
        "\x81\x30\x3d\xe7\x90\x8f\x77\x32\x68\xfd\x3f\x1e\xe3\xf4\x3d\xb0\x3b"
        "\x5b\x7e\x51\xf2\xfd\x66\xfc\xdf\xf1\xf6\xb5\x18\x97\xed\x0f\x69\xfc"
        "\xdf\xb4\x3d\xd6\xba\xa4\x2b\x6d\xe9\x6a\x97\xcf\x76\x4b\x1e\x6b\x60"
        "\x8c\x7d\x30\xf6\xe3\xff\x8e\x7d\xb8\xb9\xa1\xe5\xd5\x67\x47\xbd\xbe"
        "\xc2\x26\x0a\xf5\x7a\x7d\xb8\x17\xb4\x4a\x8c\xb4\x70\x46\xfe\xf9\x8f"
        "\xfa\x77\xc2\xa8\xcb\x1f\xec\xf3\xdf\xf8\xda\xe6\xe3\xff\xe6\xe7\xf0"
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        "\xa8\xe8\xde\x63\x4f\xbf\xfd\x56\xf5\x3a\xcf\x67\xbc\x7c\x3e\xc6\x5f"
        "\x88\xf1\x17\x63\xfc\x68\x8c\x17\x62\xbc\x18\xe3\x83\x31\x5e\xda\xa0"
        "\xfa\x31\x1c\x4f\xfe\xfa\x77\x47\x5e\x2b\x5a\xbf\xf7\x77\x64\xf9\xfd"
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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\x8c\x4c\xa5\xf1\x77\x79\x79\xbe\x08\xe1\xca\xdb\x6f\x1c\x7b"
        "\xe6\xc4\xd9\xc5\x95\x29\x8f\x37\xe7\xa8\x35\xfe\x4e\xb7\xa5\xaa\xcd"
        "\xf7\x85\xf0\x58\x8c\xa7\x62\xfc\xf3\xf8\xe2\xe6\x87\xaf\x9e\x6a\x8f"
        "\x6f\xc5\xb8\x08\x4b\xa1\x08\x45\x73\x7a\x78\xfa\x46\xb3\xa4\xed\x21"
        "\x84\x8b\x61\x7f\xb8\x1a\x6a\x61\xef\x95\x6b\xaf\xbf\xbb\xf4\xd4\x89"
        "\x4b\xc7\x2f\x1f\x78\xef\xcd\x23\xd7\x87\xf7\x09\x00\x00\x00\xc0\xd6"
        "\xf7\xbf\x00\x00\x00\xff\xff\xd1\x3d\x16\x2b",
        2646);
    syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x200001c0, /*flags=*/0x800000,
                    /*opts=*/0x20000240, /*chdir=*/1, /*size=*/0xa56,
                    /*img=*/0x20000c40);
    break;
  case 1:
    memcpy((void*)0x20000180, "./file2\000", 8);
    res = syscall(__NR_open, /*file=*/0x20000180ul, /*flags=*/0x14f942ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    memcpy((void*)0x20000040, "./bus\000", 6);
    res = syscall(__NR_open, /*file=*/0x20000040ul, /*flags=*/0x147042ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    syscall(__NR_ftruncate, /*fd=*/r[1], /*len=*/0x2007ffful);
    break;
  case 4:
    syscall(__NR_sendfile, /*fdout=*/r[0], /*fdin=*/r[1], /*off=*/0ul,
            /*count=*/0x1000000201004ul);
    break;
  case 5:
    memcpy((void*)0x20000100, "./file0\000", 8);
    res = syscall(__NR_open, /*file=*/0x20000100ul, /*flags=*/0x40c2ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 6:
    memcpy(
        (void*)0x20000600,
        "\x34\xfd\x98\xaa\x1d\x0e\x7a\xde\xc9\x37\xa5\xf3\x31\xa7\x5f\x48\x79"
        "\x34\xf5\x02\x42\xa0\x75\x19\x44\x93\x69\x72\x89\x6c\x29\xa5\x06\x8c"
        "\x8e\xcb\xa1\xaa\x0a\x4e\x2a\x63\x1b\x51\x80\xe1\xfb\xde\x79\xf4\x50"
        "\x2d\xc4\xc4\xa1\xfb\xa9\xdc\xd9\xed\x83\xe6\x39\xae\xfa\x1b\x87\x63"
        "\x1c\x33\xd1\xa8\x2c\xb0\xc0\x03\x56\x76\xdd\xfe\xb0\xfe\x79\x84\xd7"
        "\x51\x9b\x0f\x83\x9d\x49\x7f\xc9\xd6\x4e\xf1\x4d\x1d\xe2\x22\x20\xff"
        "\x26\x23\xdf\x49\x50\x13\x4b\x9f\xb7\x34\xa5\x2a\xda\xd9\x5f\x13\x1c"
        "\xce\x36\x72\xa9\xd7\xd7\xb4\x00\xd2\xc6\x28\x10\xb5\xf2\x03\x51\x63"
        "\x93\x30\x94\x81\x07\xbf\x8d\x45\x34\xa0\x3a\xc3\x89\x45\x5c\x54\xd8"
        "\xeb\x4d\x60\x9b\x3e\x85\x8b\x72\x13\xb3\x8e\xb0\x1f\x0e\xea\xba\x37"
        "\x39\xae\x92\x79\x16\xe2\x8d\xa6\xa7\x9a\x3f\xd5\xe3\x2d\x30\xab\x30"
        "\xbf\x95\x9d\x45\x96\xe5\xff\xbf\xf6\x78\x9a\x65\x0b\x9e\x7d\x24\x8d"
        "\x1b\xa8\x68\x01\x23\x36\xa4\xf3\xef\x8f\xab\x07\xa8\xf5\xb8\x1b\xb0"
        "\xbc\x45\xb2\x17\x45\x38\x31\x5c\xa1\x2b\x7c\x72\x3b\x21\x57\x56\x25"
        "\x64\xa8\xa1\xf1\x9d\x28\x17\x9f\x8c\x56\x54\x48\xe0\xe9\x21\xb8\xc3"
        "\xe6\xfc\x4a\xda\xaf\xa8\xb9\x29\xad\x07\x7f\x63\x33\x25\xb6\xa6\xf7"
        "\x1a\x58\x6c\xab\xc4\x88\x3e\x03\xe1\x93\x15\xf9\x46\xb2\x77\x85\x85"
        "\x93\xa7\x36\x7e\x23\x22\x02\xfe\x9a\xd6\x56\xc6\x76\x8a\x15\x17\xda"
        "\x7f\x04\x98\xb4\x8c\xb0\x78\xe9\x29\xfb\x11\xdb\x0c\xc5\x51\xf7\x54"
        "\xbf\xfc\x48\x59\xdd\x89\xa3\x96\x91\x5c\xc8\x09\xb0\x7d\x44\x85\x73"
        "\x09\x84\x09\xea\x21\x37\x10\x56\xf6\x7e\xf4\x11\x4e\xc1\x05\x47\xf4"
        "\x98\xd2\x45\x13\xfe\x59\x43\x08\xbf\x02\x28\x68\xad\x21\xe8\x5b\xba"
        "\x81\x19\x42\xfd\xc4\x51\x61\xa1\xa8\xa7\xfe\x00\xd5\xc6\xb0\x5e\xd7"
        "\x95\x4f\x63\x1b\xbd\x12\xa5\xc9\xa5\xcf\xa5\x96\x5e\x05\x95\xde\x60"
        "\x8b\x04\xeb\xe0\x2b\x3f\xcb\xf3\xb9\xf5\x78\x07\xa1\xa7\xad\x85\x28"
        "\x99\x2e\x2e\xc6\x59\x49\xda\x2f\x4a\x04\x78\xdf\xd3\xae\x52\x63\x9c"
        "\x15\xd8\xae\xaa\x35\x1d\xa6\xd3\x93\xb5\x8c\x77\x21\x68\xfa\xe6\x04"
        "\xd0\x97\xfe\xf4\xd6\xb9\x36\x0e\xb1\x69\xa0\xb0\xee\x70\xcd\xc2\x24"
        "\x35\xa0\x03\xe6\x86\x98\xf6\x1b\x3b\x63\xb1\xf5\x10\x11\xbc\x8f\x4e"
        "\xf9\x44\xc1\xde\x82\x17\x85\xf6\x70\x12\x4a\x1c\x6e\xd1\x83\x35\xd6"
        "\x34\x12",
        512);
    syscall(__NR_write, /*fd=*/r[2], /*buf=*/0x20000600ul, /*count=*/0x200ul);
    break;
  case 7:
    *(uint32_t*)0x20000380 = 0x16;
    *(uint16_t*)0x20000384 = 0x98;
    *(uint16_t*)0x20000386 = 0xfa00;
    *(uint64_t*)0x20000388 = 0;
    *(uint64_t*)0x20000390 = 0;
    *(uint32_t*)0x20000398 = -1;
    *(uint16_t*)0x2000039c = 0x30;
    *(uint16_t*)0x2000039e = 0;
    *(uint16_t*)0x200003a0 = 0x1b;
    *(uint16_t*)0x200003a2 = htobe16(0x7fff);
    *(uint32_t*)0x200003a4 = htobe32(0x6000);
    memcpy((void*)0x200003a8,
           "\x95\xa0\x91\xf4\x74\xa7\xff\x3e\x35\x65\x73\x26\x68\x1e\x04\xee",
           16);
    *(uint64_t*)0x200003b8 = htobe64(4);
    *(uint64_t*)0x200003c0 = htobe64(0x3f);
    *(uint64_t*)0x200003c8 = 0x401;
    syscall(__NR_write, /*fd=*/r[2], /*data=*/0x20000380ul, /*len=*/0xa0ul);
    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;
}