// https://syzkaller.appspot.com/bug?id=ff834988a0e05a23199aa0230d9afa4b010c69d2
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>
#include <linux/loop.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

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

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

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

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

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

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

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

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

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

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

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

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

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

#define ZLIB_HEADER_WIDTH 2

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

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

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

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

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  } else if (strncmp(fs, "gfs2", 4) == 0 &&
             (strstr(opts, "errors=panic") || strstr(opts, "debug"))) {
    strcat(opts, ",errors=withdraw");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

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

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

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

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 7; 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 (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  syz_mount_image$udf arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {75 64 66 00} (length 0x4)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x8000 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //      }
    //    }
    //    chdir: int8 = 0x1 (1 bytes)
    //    size: len = 0xc4d (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0xc4d)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000000, "udf\000", 4);
    memcpy((void*)0x200000000c80, "./file1\000", 8);
    memcpy(
        (void*)0x200000000cc0,
        "\x78\x9c\xec\xdd\x5d\x6c\x5c\x67\x5a\x07\xf0\xe7\x9d\x63\x27\x76\xca"
        "\xb2\x53\xda\xa6\x5d\xba\x48\xb3\x14\xb1\x69\x9a\x04\xe7\xa3\xad\x51"
        "\x5a\xe4\x6c\x8c\xb5\x2b\x45\x6d\x54\xc7\x0b\x37\x20\x8f\xe3\x49\x18"
        "\xd5\x1e\xbb\xb6\xb3\x4a\x2b\x58\x05\x09\xb8\x01\x41\x50\x91\x56\xc0"
        "\x05\xb9\x41\xe2\x82\x8b\xdc\x20\xa1\x15\x42\x11\x37\x8b\x04\x48\x11"
        "\xa8\xd2\x22\x90\x08\xb4\x8d\x56\x42\x80\x57\xb0\xb0\x62\x25\x8c\xce"
        "\xcc\x3b\xf6\xd8\x1b\xd7\x6e\xbe\x9c\x34\xbf\xdf\x6e\xf2\x9f\x73\xe6"
        "\x3d\x33\xef\x99\xf6\x39\x73\xa6\x9a\xe7\x4c\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x11\x5f\xf8\xe9\x13\x43\x87\xd3"
        "\x4e\xcf\x02\x00\xb8\x9f\x5e\x1b\x7f\x63\xe8\xa8\xf7\x7f\x00\x78\xa4"
        "\x9c\xf1\xf9\x1f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\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\xad\xa5\x28\xe2\xad"
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        "\x1d\xbb\xf5\x66\x83\x29\x52\x54\xa2\x68\x8f\x2f\xff\x0c\x1c\x3e\x72"
        "\xf4\xd8\x8b\x2f\xbd\x3c\xdc\xcd\x8f\xde\xfe\x6e\xfb\x4c\xbc\x3e\x7e"
        "\xe6\x44\xed\xe4\xdc\xec\xfc\x42\x63\x71\xb1\x31\x5d\x9b\x68\x35\xcf"
        "\xce\x4d\x37\xb6\xfd\x08\x77\xba\xfd\x46\xfb\xdb\x2f\x40\x6d\xf6\xcd"
        "\x0b\xd3\xe7\xce\x2d\xd6\x8e\x1c\x3a\xba\xee\xee\x8b\xd5\x9b\xbb\x1f"
        "\xdb\x5b\x3d\x3e\xfc\xec\x81\xe7\xbb\x63\x27\x46\xc7\xc6\xc6\x7b\xc6"
        "\xf4\xf5\xdf\xf6\xb3\x7f\x9f\x74\xf7\x1e\x8a\x4f\x90\x5d\x51\xc4\x17"
        "\x23\xc5\x37\x0e\x7e\x2b\xd5\x23\xa2\x12\x77\x5e\x0b\x5b\x1c\x3b\xee"
        "\xb5\xc1\xe8\x2b\xeb\xaf\xbd\x13\x13\xa3\x63\xed\x1d\x99\x69\xd6\x5b"
        "\x4b\xe5\x9d\xa9\x92\x47\xf5\x45\x54\x7b\x36\x1a\xe9\xd6\xc8\x7d\xa8"
        "\xc5\x3b\x32\x12\x71\xa9\xfc\xe7\x54\x4e\x78\x7f\xb9\x7b\xe3\xf3\xf5"
        "\x85\xfa\xd4\x4c\xa3\x76\xba\xbe\xb0\xd4\x5c\x6a\xce\xb5\x52\xa5\x33"
        "\xdb\x72\x7f\xaa\x51\x89\xe1\x14\x31\x1f\x11\xcb\xc5\x4e\x4f\x9e\x07"
        "\x4d\x7f\x14\xf1\x6a\xa4\xb8\xf9\xbd\xe5\x34\x15\x11\x45\xb7\x0e\x5e"
        "\x78\x6d\xfc\x8d\xa1\xa3\x9b\x6f\xd8\x77\x1f\x27\xb9\xc9\xd3\x57\x8b"
        "\x88\xeb\xf1\x10\xd4\x2c\x3c\xa0\x76\x47\x11\xbf\x1d\x29\xde\x9d\x1c"
        "\x8a\xb3\xb9\xae\xda\x65\xf3\x41\xc4\xe7\xcb\x7c\x25\xe2\xad\x32\xaf"
        "\xa5\xb8\x9c\x97\x53\x79\x80\x18\x8e\xf8\xb6\xf7\x13\x78\xa8\xf5\x45"
        "\x11\x7f\x13\x29\xe6\xd2\x72\x9a\xee\xd6\x7e\xfb\xbc\xf2\xd4\x97\x6b"
        "\x5f\x6a\x9d\x9b\xeb\x19\xdb\x3d\xaf\x7c\xe8\x3f\x1f\xdc\x4f\xce\x4d"
        "\x78\x80\x0d\x44\x11\x53\xed\x33\xfe\xe5\x74\xfb\xff\xb1\x0b\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\xb8\x3f\x8a\xf8\x7a\xa4\xb8\x3a\xbb"
        "\x2f\xcd\x47\x6f\x4f\x69\xb3\x75\xbe\x76\xa6\x3e\x35\xd3\xf9\x56\x70"
        "\xf7\xbb\xff\xb5\xbc\xd5\xca\xca\xca\x4a\x35\x75\xb2\x96\x73\x28\xe7"
        "\x48\xce\xd3\x39\x27\x73\xce\xe7\xbc\x94\xf3\x72\xce\x2b\x39\xaf\xe6"
        "\xbc\x96\xf3\x7a\xce\x1b\x39\x97\x73\x46\x25\x3f\x7f\xce\x5a\xce\xa1"
        "\x9c\x23\x39\x4f\xe7\x9c\xcc\x39\x9f\xf3\x52\xce\xcb\x39\xaf\x74\xb2"
        "\xdb\xd1\xb8\x72\x2d\xaf\xbf\x9e\xf3\x46\xce\xe5\x9c\xa1\xef\x09\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xbb\x6c\x30"
        "\x8a\xf8\x8d\x48\xf1\xef\xbf\xff\x95\xf6\xef\x4a\x47\xfb\x77\xe9\x3f"
        "\x7d\x7c\xf8\xe4\xa9\x4f\xf5\xfe\x66\xfc\x33\x5b\x3c\x4e\x39\xf6\x50"
        "\x44\x7c\x3d\xb6\xf7\x9b\xbc\xbb\xf2\x6f\x8d\xa7\x4a\xf9\xbf\xbb\xbf"
        "\x5f\xc0\xd6\x06\xa2\x88\xaf\xe6\xdf\xff\xfb\xe5\x9d\x9e\x0c\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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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"
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        "\x9d\xdb\x69\xbb\x13\xdd\xdf\x2e\xbc\xb2\x10\xc6\xc6\x7b\x56\xf7\xe5"
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        "\x29\x7e\xfe\x8f\x8a\xd4\xad\xa1\x5c\xff\x3f\xd0\x59\x2a\x56\xc7\xfe"
        "\xcf\x57\xd7\x6a\xea\xf8\x86\x5c\xb5\x43\xf5\xff\x44\xcf\xba\xe3\xf9"
        "\xa8\xd5\xdf\x17\x31\xb0\x34\x3b\xdf\xff\x74\xc4\xc0\xe2\xdb\xef\x1c"
        "\x6c\xce\xd6\xcf\x37\xce\x37\x5a\xc7\x8e\xbc\xfc\xd2\xf0\xb1\x97\x5f"
        "\x3c\xf6\x52\xff\xae\x88\x81\x73\xcd\x99\xc6\xd0\xda\xad\x6d\xbf\x76"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x70\xaf\xf4\xa7"
        "\x22\xbe\x10\x29\x7e\xe9\xef\xfe\x72\xb5\x6f\x3c\xf7\xff\x7d\xaa\xb3"
        "\xb4\xd6\xff\xd7\xdb\xff\xbb\x6f\xc3\xe3\xf4\x5e\x37\x60\xb3\xdb\xb7"
        "\xec\xf5\xdb\xa2\xaf\xaf\x57\xf9\x9c\x29\x15\xf1\x54\xa4\x78\xf6\xcf"
        "\x9e\x69\xcf\x37\xc5\x1e\x3d\xef\x70\x9b\xf6\xa4\x22\xbe\x5b\xd6\xd3"
        "\xf4\x17\xd3\xe7\xf2\xba\x5c\xff\xb9\xb3\xff\xd6\xf5\x7f\x69\x43\xae"
        "\xda\xa1\xfe\xdf\xc7\x7b\xd6\x5d\xca\xc7\x89\xff\x88\x14\x8f\xff\xc1"
        "\x33\xf1\xb9\x9e\xe3\xc4\xc6\xee\xde\x72\xdc\x5f\x44\x8a\xa9\x1f\xf9"
        "\x6c\x1e\x17\xbb\xca\x71\xdd\xc7\xeb\xf4\x44\x77\x1a\x83\xcb\xb1\x5f"
        "\x89\x14\xef\x9f\x5e\x3f\xb6\xdb\x37\xfd\xc4\xda\xd8\xc3\xdb\xdd\x2d"
        "\xd8\x49\x65\xfd\xcf\x46\x8a\x7f\xf8\xad\xbf\x8d\x1f\xcd\xeb\xd6\x5f"
        "\xff\xe3\xd6\xf5\xbf\x67\x43\xae\xda\xa1\xfa\x7f\xb2\x77\x9f\x22\x62"
        "\xf1\xed\x77\xde\xac\xcf\xcc\x34\x16\x16\xb7\xfd\x52\xc0\x23\xa7\xac"
        "\xff\x5f\x8f\x14\x7f\xfd\x27\xdf\x8c\xe7\xf2\xba\x8f\xba\xfe\x4f\xf7"
        "\x3a\x3f\xfb\x9e\x5b\x9f\x83\xdd\x41\x3b\x54\xff\x4f\xf5\xac\xab\xe6"
        "\x79\xfd\xd8\xc7\x7c\x2d\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x61"
        "\xb1\x27\x15\xf1\x4f\x91\xe2\xcf\xff\xf4\x40\x3a\x98\xd7\x6d\xe7\xfb"
        "\xbf\xd3\x1b\x72\xd5\x0e\x7d\xff\xef\xe9\x9e\x75\xd3\xeb\xbe\xff\x7b"
        "\xef\x6e\x6c\xfb\x45\x06\x00\x80\x07\x44\x7f\x2a\xe2\x27\x22\xc5\x1f"
        "\x4f\x7f\x90\xba\xbd\xb1\x9b\xf6\xff\xbe\xb2\xd6\xff\x33\xba\xf1\xc4"
        "\xbd\x7d\x4e\xff\x83\xed\x3e\xff\x8f\x75\xae\xff\x31\xfa\xff\xcb\xe7"
        "\x4c\xa9\x88\xff\xcb\x7d\xbd\x43\x5b\xf4\xf5\xfe\x78\xa4\xf8\xb5\x9f"
        "\x3a\x90\xc7\xa5\xbd\xe5\xb8\x91\xee\x74\xdb\x7f\x0f\xbc\x36\xd7\x3a"
        "\x78\x62\x66\x66\xee\x6c\x7d\xa9\x3e\x35\xd3\xa8\x8d\xcf\xd7\xcf\x36"
        "\xca\x6d\xf7\x47\x8a\x7f\xfd\xb7\xcf\xe6\x6d\x2b\xed\x3e\xdf\x6e\x7f"
        "\x74\xa7\x37\x78\xad\x27\xf8\x77\x22\xc5\xcf\x7d\xd8\x1d\xdb\xe9\x09"
        "\xee\xf6\x52\x3e\xb9\x36\xf6\x70\x39\xf6\x60\xa4\xf8\xee\xfb\xeb\xc7"
        "\x76\xfb\xae\x9e\x5a\x1b\x7b\xa4\x1c\xfb\x9b\x91\x62\xec\xbf\x6f\x3d"
        "\x76\xef\xda\xd8\xa3\xe5\xd8\x7f\x8c\x14\xff\xf9\x6e\xad\x3b\x76\x4f"
        "\x39\xb6\xfb\x79\xee\xe9\xb5\xb1\x87\xce\xce\xcd\x7c\xdf\x47\x36\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x76\x5e\x7f"
        "\x2a\x22\x45\x8a\x6b\x3f\x73\x65\xb5\x37\x7e\xfd\xf5\xbf\xba\xd7\x01"
        "\x58\x7f\xfd\xaf\x8d\xee\xd5\xef\xff\x57\xef\xce\x6e\x02\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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\x43\x21\x45\x11\xff\x15\x29\xde\x1b\x5b\x4e\x37\x8a\x72"
        "\xb9\x63\xe0\x54\xb3\x75\xe1\xe2\xc4\xe8\xd8\xad\x37\x1b\x4c\x91\xa2"
        "\x12\x45\x7b\x7c\xf9\x67\xe0\xf0\x91\xa3\xc7\x5e\x7c\xe9\xe5\xe1\x6e"
        "\x7e\xf4\xf6\x77\xdb\x67\xe2\xf5\xf1\x33\x27\x6a\x27\xe7\x66\xe7\x17"
        "\x1a\x8b\x8b\x8d\xe9\xda\x44\xab\x79\x76\x6e\xba\xb1\xed\x47\xb8\xbd"
        "\xed\x8b\x4d\xef\xd9\xdf\x7e\x01\x6a\xb3\x6f\x5e\x98\x3e\x77\x6e\xb1"
        "\x76\xe4\xd0\xd1\x75\x77\x5f\xac\xde\xdc\xfd\xd8\xde\xea\xf1\xe1\x67"
        "\x0f\x3c\xdf\x1d\x3b\x31\x3a\x36\x36\xde\x33\xa6\xaf\x7f\xdb\xb3\xdf"
        "\x52\xba\x7b\x0f\xc5\x27\xc8\xae\x28\xe2\xaf\x22\xc5\x37\x0e\x7e\x2b"
        "\xfd\x73\x11\x51\x89\xdb\xae\x85\x55\x5b\x1c\x3b\xee\xb5\xc1\xe8\x2b"
        "\xeb\xaf\xbd\x13\x13\xa3\x63\xed\x1d\x99\x69\xd6\x5b\x4b\xe5\x9d\xa9"
        "\x92\x47\xf5\x45\x54\x7b\x36\x1a\xe9\xd6\xc8\x7d\xa8\xc5\x3b\x32\x12"
        "\x71\x29\x22\x2a\xe5\x84\xf7\x97\xbb\x37\x3e\x5f\x5f\xa8\x4f\xcd\x34"
        "\x6a\xa7\xeb\x0b\x4b\xcd\xa5\xe6\x5c\x2b\x55\x3a\xb3\x2d\xf7\xa7\x1a"
        "\x95\x18\x4e\x11\xf3\x11\xb1\xbc\xf9\xd1\x8a\x47\x54\x7f\x14\x71\x2d"
        "\x52\xdc\xfc\xde\x72\xfa\x97\xa2\xf3\x86\xd6\xae\x83\x17\x5e\x1b\x7f"
        "\x63\xe8\xe8\xe6\x1b\xf6\xdd\xc7\x49\x6e\xf2\xf4\xd5\x22\xe2\x7a\x3c"
        "\x04\x35\x0b\x0f\xa8\xdd\x51\xc4\x93\x91\xe2\xdd\xc9\xa1\x78\xbf\xe8"
        "\xd4\x55\xbb\x6c\x3e\x88\xf8\x7c\x99\xaf\x44\xbc\x55\xe6\xb5\x14\x97"
        "\xf3\x72\x2a\x0f\x10\xc3\x11\xdf\xf6\x7e\x02\x0f\xb5\xbe\x28\xe2\x74"
        "\xa4\x98\x4b\xcb\xe9\x83\x22\xd7\x7e\xfb\xbc\xf2\xd4\x97\x6b\x5f\x6a"
        "\x9d\x9b\xeb\x19\xdb\x3d\xaf\x7c\xe8\x3f\x1f\xdc\x4f\xce\x4d\x78\x80"
        "\x0d\x44\x11\x1f\xb6\xcf\xf8\x97\xd3\x87\xde\xcf\x01\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\xe0\x01\x57\xc4\xab\x91\xe2\xea\xec\xbe\xd4\xee"
        "\x0f\x5d\xed\x29\x6d\xb6\xce\xd7\xce\xd4\xa7\x66\x3a\x5f\xeb\xef\x7e"
        "\xf7\xbf\x96\xb7\x5a\x59\x59\x59\xa9\xa6\x4e\xd6\x72\x0e\xe5\x1c\xc9"
        "\x79\x3a\xe7\x64\xce\xf9\x9c\x97\x72\x5e\xce\x79\x25\xe7\xd5\x9c\xd7"
        "\x72\x5e\xcf\x79\xa3\x9d\xbb\xdb\x8d\x89\xe5\x72\x54\xf2\xf3\xe7\xac"
        "\xe5\x1c\xca\x39\x92\xf3\x74\xce\xc9\x9c\xf3\x39\x2f\xe5\xbc\x9c\xf3"
        "\x4a\xce\xab\x39\xaf\xe5\xbc\x9e\xf3\x46\xce\xe5\x9c\x1f\xd1\xf5\x0f"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x77\xa4\x12"
        "\x45\xfc\x6a\xa4\xf8\xda\x77\x96\xd3\x4a\xd1\xf9\x7d\xd9\xc9\xe8\xe4"
        "\x8d\xf5\x7d\xae\xbb\x76\x6a\x8e\xc0\xbd\xf1\xff\x01\x00\x00\xff\xff"
        "\x7c\xe0\x1b\xfc",
        3149);
    syz_mount_image(/*fs=*/0x200000000000, /*dir=*/0x200000000c80,
                    /*flags=MS_SILENT*/ 0x8000, /*opts=*/0x200000000040,
                    /*chdir=*/1, /*size=*/0xc4d, /*img=*/0x200000000cc0);
    break;
  case 1:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x42 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000100, "./file1\000", 8);
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000100ul,
                  /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 32 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x42 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000200, "./file2\000", 8);
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000200ul,
                  /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    //  pwrite64 arguments: [
    //    fd: fd (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {32} (length 0x1)
    //    }
    //    count: len = 0xff10 (8 bytes)
    //    pos: intptr = 0x8000c61 (8 bytes)
    //  ]
    memset((void*)0x200000000140, 50, 1);
    syscall(__NR_pwrite64, /*fd=*/r[1], /*buf=*/0x200000000140ul,
            /*count=*/0xff10ul, /*pos=*/0x8000c61ul);
    break;
  case 4:
    //  dup2 arguments: [
    //    oldfd: fd (resource)
    //    newfd: fd (resource)
    //  ]
    //  returns fd
    res = syscall(__NR_dup2, /*oldfd=*/r[1], /*newfd=*/r[0]);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    //  write$FUSE_WRITE arguments: [
    //    fd: fd_fuse (resource)
    //    arg: ptr[in, fuse_out_t[fuse_unique, fuse_write_out]] {
    //      fuse_out_t[fuse_unique, fuse_write_out] {
    //        len: len = 0x18 (4 bytes)
    //        err: fuse_errors = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        payload: fuse_write_out {
    //          size: int32 = 0x0 (4 bytes)
    //          padding: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    len: bytesize = 0xfffffdef (8 bytes)
    //  ]
    *(uint32_t*)0x2000000000c0 = 0x18;
    *(uint32_t*)0x2000000000c4 = 0;
    *(uint64_t*)0x2000000000c8 = 0;
    *(uint32_t*)0x2000000000d0 = 0;
    *(uint32_t*)0x2000000000d4 = 0;
    syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x2000000000c0ul,
            /*len=*/0xfffffdeful);
    for (int i = 0; i < 32; i++) {
      syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x2000000000c0ul,
              /*len=*/0xfffffdeful);
    }
    break;
  case 6:
    //  read$FUSE arguments: [
    //    fd: fd_fuse (resource)
    //    buf: ptr[out, fuse_in[read_buffer]] {
    //      fuse_in[read_buffer] {
    //        len: len = 0x2020 (4 bytes)
    //        opcode: int32 = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        uid: uid (resource)
    //        gid: gid (resource)
    //        pid: pid (resource)
    //        padding: int32 = 0x0 (4 bytes)
    //        payload: buffer: (DirOut)
    //      }
    //    }
    //    len: bytesize = 0x2020 (8 bytes)
    //  ]
    syscall(__NR_read, /*fd=*/r[2], /*buf=*/0x2000000027c0ul, /*len=*/0x2020ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  use_temporary_dir();
  loop();
  return 0;
}