// https://syzkaller.appspot.com/bug?id=66a47f8ddcf8d46571cb3fc82fbba5edbbf12e0d
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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/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 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;
}

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2, 0);
  }
}

//% 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")) {
  }
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 00} (length 0xfd)
  //    }
  //    flags: mount_flags = 0x4000 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nombcache: buffer: {6e 6f 6d 62 63 61 63 68 65} (length 0x9)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              errors_continue: buffer: {65 72 72 6f 72 73 3d 63 6f 6e 74 69
  //              6e 75 65} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              stripe: fs_opt["stripe", fmt[hex, int32]] {
  //                name: buffer: {73 74 72 69 70 65} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: int32 = 0x7 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              discard: buffer: {64 69 73 63 61 72 64} (length 0x7)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              max_dir_size_kb: fs_opt["max_dir_size_kb", fmt[hex, int32]] {
  //                name: buffer: {6d 61 78 5f 64 69 72 5f 73 69 7a 65 5f 6b 62}
  //                (length 0xf) eq: const = 0x3d (1 bytes) val: int32 = 0x0 (18
  //                bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              debug_want_extra_isize: fs_opt["debug_want_extra_isize",
  //              fmt[hex, int32]] {
  //                name: buffer: {64 65 62 75 67 5f 77 61 6e 74 5f 65 78 74 72
  //                61 5f 69 73 69 7a 65} (length 0x16) eq: const = 0x3d (1
  //                bytes) val: int32 = 0x84 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              max_batch_time: fs_opt["max_batch_time", fmt[hex, int32]] {
  //                name: buffer: {6d 61 78 5f 62 61 74 63 68 5f 74 69 6d 65}
  //                (length 0xe) eq: const = 0x3d (1 bytes) val: int32 = 0x0 (18
  //                bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              test_dummy_encryption: buffer: {74 65 73 74 5f 64 75 6d 6d 79
  //              5f 65 6e 63 72 79 70 74 69 6f 6e} (length 0x15)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0xd (1 bytes)
  //    size: len = 0x5f6 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x5f6)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000140, "ext4\000", 5);
  memcpy((void*)0x200000000200,
         "./"
         "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
         253);
  memcpy((void*)0x200000001400, "nombcache", 9);
  *(uint8_t*)0x200000001409 = 0x2c;
  memcpy((void*)0x20000000140a, "errors=continue", 15);
  *(uint8_t*)0x200000001419 = 0x2c;
  memcpy((void*)0x20000000141a, "stripe", 6);
  *(uint8_t*)0x200000001420 = 0x3d;
  sprintf((char*)0x200000001421, "0x%016llx", (long long)7);
  *(uint8_t*)0x200000001433 = 0x2c;
  memcpy((void*)0x200000001434, "discard", 7);
  *(uint8_t*)0x20000000143b = 0x2c;
  memcpy((void*)0x20000000143c, "max_dir_size_kb", 15);
  *(uint8_t*)0x20000000144b = 0x3d;
  sprintf((char*)0x20000000144c, "0x%016llx", (long long)0);
  *(uint8_t*)0x20000000145e = 0x2c;
  memcpy((void*)0x20000000145f, "debug_want_extra_isize", 22);
  *(uint8_t*)0x200000001475 = 0x3d;
  sprintf((char*)0x200000001476, "0x%016llx", (long long)0x84);
  *(uint8_t*)0x200000001488 = 0x2c;
  memcpy((void*)0x200000001489, "max_batch_time", 14);
  *(uint8_t*)0x200000001497 = 0x3d;
  sprintf((char*)0x200000001498, "0x%016llx", (long long)0);
  *(uint8_t*)0x2000000014aa = 0x2c;
  memcpy((void*)0x2000000014ab, "test_dummy_encryption", 21);
  *(uint8_t*)0x2000000014c0 = 0x2c;
  *(uint8_t*)0x2000000014c1 = 0;
  memcpy(
      (void*)0x200000000c00,
      "\x78\x9c\xec\xdd\xcf\x6b\x1c\x55\x1c\x00\xf0\xef\x6c\x7e\x34\x69\xaa\x49"
      "\x8b\xa8\xf5\x60\x17\x44\x5a\xd0\x26\x4d\xda\x4a\x11\x0f\xed\x55\x4a\xa8"
      "\x3f\xf0\xe2\xc5\xd8\xa4\xb5\x76\xdb\x86\x26\xa2\xa9\x42\x53\xa8\x17\x41"
      "\xbc\x88\x08\x9e\x3c\x58\xc1\x3f\x42\x8b\xbd\xf6\xa4\x20\x78\xf0\xe2\x49"
      "\x0a\x45\xa5\x47\xc1\x95\xd9\xcc\xa4\xd9\xec\x6e\x7e\x6c\x93\x6c\xec\x7c"
      "\x3e\xb0\xcd\xcc\x7b\x33\xf3\xde\x74\xf3\xcd\x9b\x79\xfb\xde\x6c\x00\x85"
      "\x55\x4e\xff\x29\x45\xec\x8d\x88\xe9\x24\x62\x30\x99\x5f\xcc\xeb\x8e\x2c"
      "\xb3\xbc\xb0\xdd\xbd\xbf\x3f\x3a\x9d\xbe\x92\xa8\x56\x5f\xfb\x33\x89\x24"
      "\x4b\xcb\xb7\x4f\xb2\x9f\x03\xd9\xce\x7d\x11\xf1\xd3\x8f\x49\xec\xe9\x6a"
      "\x2c\x77\x66\xee\xca\xf9\x89\x4a\x65\xea\x72\xb6\x3e\x32\x7b\x61\x7a\x64"
      "\x66\xee\xca\xc1\x73\x17\x26\xce\x4e\x9d\x9d\xba\x38\xf6\xc2\xd8\xb1\xa3"
      "\x47\x8e\x1e\x1b\x3d\xd4\xd6\x79\x5d\x6d\x92\x76\xf2\xfa\xbb\xef\x0f\x7e"
      "\x32\xfe\xe6\x37\x5f\xfd\x93\x8c\x7e\xfb\xdb\x78\x12\xc7\xe3\xe5\x6c\xc3"
      "\xa5\xe7\x11\x11\xbf\x94\xda\x2a\xb5\x5e\x39\xca\xb5\xff\x93\xa4\x31\x6b"
      "\xe0\xd8\x06\x1c\x7f\x3b\xe8\xca\x7e\x4f\x96\xbe\xc5\x49\x77\x07\x2b\xc4"
      "\xba\xe4\xef\x5f\x4f\x44\x3c\x11\x83\xd1\x15\xf7\xdf\xbc\xc1\xf8\xf8\x95"
      "\x8e\x56\x0e\xd8\x54\xd5\x24\xa2\x0a\x14\x54\x22\xfe\xa1\xa0\xf2\xeb\x80"
      "\xfc\xde\x7e\xd9\x7d\x70\x6c\xc4\x7d\x30\xb0\x3d\xdd\x3d\xb1\xd0\x01\xd0"
      "\x18\xff\xdd\x0b\x7d\x83\xd1\x57\xeb\x1b\xd8\x79\x2f\x89\xa5\xdd\x3a\x49"
      "\x44\xb4\xd7\x33\x57\x6f\x57\x44\xdc\xbe\x35\x7e\xfd\xcc\xad\xf1\xeb\xd1"
      "\xd8\x0f\x07\x6c\xa2\xf9\x6b\x11\xf1\x64\xb3\xf8\x4f\x6a\xf1\x3f\x14\x7d"
      "\x31\x54\x8b\xff\x52\x5d\xfc\xa7\xd7\x05\xa7\xb2\x9f\x69\xfa\xab\x6d\x96"
      "\xbf\xbc\xab\xb8\x31\xfe\x0f\xb7\x79\x64\x60\x35\x0b\xf1\xdf\xb7\x62\xfc"
      "\x47\x8b\xf8\x7f\x6b\x49\xfc\xbf\xdd\x66\xf9\xe5\xfb\x8b\xef\xf4\xd7\xc5"
      "\x7f\x7f\xbb\xa7\x04\x00\x00\x00\x00\x00\x00\x85\x75\xf3\x44\x44\x3c\xdf"
      "\xec\xf3\xff\xd2\xe2\xf8\x9f\x68\x32\xfe\x67\x20\x22\x8e\x6f\x40\xf9\xe5"
      "\x65\xeb\x8d\x9f\xff\x97\xee\x6c\x40\x31\x40\x13\x77\x4f\x44\xbc\xd4\x74"
      "\xfc\x6f\x29\x1f\xfd\x3b\xd4\x95\x2d\x3d\x52\x1b\x0f\xd0\x93\x9c\x39\x57"
      "\x99\x3a\x14\x11\x8f\x46\xc4\x81\xe8\xd9\x91\xae\x8f\xae\x50\xc6\xc1\x4f"
      "\xf7\x7c\xd9\x2a\xaf\x9c\x8d\xff\xcb\x5f\x69\xf9\xb7\xb3\xb1\x80\x59\x3d"
      "\xee\x74\xef\xa8\xdf\x67\x72\x62\x76\xe2\x41\xcf\x1b\x88\xb8\x7b\x2d\xe2"
      "\xa9\xa6\xe3\x7f\x93\xc5\xf6\x3f\x69\xd2\xfe\xa7\x7f\x0f\xa6\xd7\x58\xc6"
      "\x9e\x67\x6f\x9c\x6a\x95\xb7\x7a\xfc\x03\x9b\xa5\xfa\x75\xc4\xfe\xa6\xed"
      "\xff\xfd\xa7\x56\x24\x2b\x3f\x9f\x63\xa4\x76\x3d\x30\x92\x5f\x15\x34\x7a"
      "\xfa\xc3\xcf\xbe\x6f\x55\x7e\xbb\xf1\xef\x11\x13\xf0\xe0\xd2\xf6\x7f\xe7"
      "\xca\xf1\x3f\x94\x2c\x7d\x5e\xcf\xcc\xfa\xcb\x38\x3c\xd7\x5d\x6d\x95\xd7"
      "\xee\xf5\x7f\x6f\xf2\x7a\xed\x91\x33\xbd\x59\xda\x07\x13\xb3\xb3\x97\x47"
      "\x23\x7a\x93\x93\x5d\x69\x6a\x5d\xfa\xd8\xfa\xeb\x0c\x0f\xa3\x3c\x1e\xf2"
      "\x78\x49\xe3\xff\xc0\x33\x2b\xf7\xff\x35\xbb\xfe\xef\x8f\x88\xf9\x65\xc7"
      "\x4e\xfe\xaa\x9f\x53\x9c\x7b\xfc\xdf\x81\xdf\x5b\xd5\xc7\xf5\x3f\x74\x4e"
      "\x1a\xff\x93\xeb\x6a\xff\xd7\xbf\x30\x76\x63\xe8\x87\x56\xe5\xaf\xad\xfd"
      "\x3f\x52\x6b\xeb\x0f\x64\x29\xfa\xff\x60\xc1\x17\x79\x98\xf6\xd6\xa7\x37"
      "\x46\xe1\x62\x40\xd7\x65\x6d\x75\x7d\x01\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x61"
      "\x50\x8a\x88\x5d\x91\x94\x86\x17\x97\x4b\xa5\xe1\xe1\x88\x81\x88\x78\x2c"
      "\x76\x96\x2a\x97\x66\x66\x9f\x3b\x73\xe9\xbd\x8b\x93\x69\x5e\xed\xfb\xff"
      "\x4b\xf9\x37\xfd\x0e\x2e\xac\x27\xf9\xf7\xff\x0f\x2d\x59\x1f\x5b\xb6\x7e"
      "\x38\x22\x76\x47\xc4\xe7\x5d\xfd\xb5\xf5\xe1\xd3\x97\x2a\x93\x9d\x3e\x79"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd8\x26\x06"
      "\x5a\xcc\xff\x4f\xfd\xd1\xd5\xe9\xda\x01\x9b\xae\xbb\xd3\x15\x00\x3a\xa6"
      "\x49\xfc\xff\xdc\x89\x7a\x00\x5b\x4f\xfb\x0f\xc5\x25\xfe\xa1\xb8\xc4\x3f"
      "\x14\x97\xf8\x87\xe2\x12\xff\x50\x5c\xe2\x1f\x8a\x4b\xfc\x43\x71\x89\x7f"
      "\x00\x00\x00\x00\x00\x78\xa8\xec\xde\x77\xf3\xd7\x24\x22\xe6\x5f\xec\xaf"
      "\xbd\x52\xbd\x59\x5e\x4f\x47\x6b\x06\x6c\xb6\x52\xa7\x2b\x00\x74\x8c\x47"
      "\xfc\x40\x71\x19\xfa\x03\xc5\xe5\x1e\x1f\x48\x56\xc9\xef\x6b\xb9\xd3\x6a"
      "\x7b\xae\x64\xfa\xf4\x03\xec\x0c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x85\xb3\x7f\xaf\xf9\xff\x50\x54\xe6\xff\x43\x71\x99\xff\x0f\xc5\x95\xcf"
      "\xff\xdf\xd7\xe1\x7a\x00\x5b\xcf\x3d\x3e\x10\xab\xcc\xe4\x6f\x3a\xff\x7f"
      "\xd5\xbd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x8d\x34\x33\x77\xe5"
      "\xfc\x44\xa5\x32\x75\x79\x23\x17\x76\xc4\x1a\x37\xfe\x6e\x33\x4a\x6f\x77"
      "\xe1\x8d\xed\x51\x8d\xad\x5c\xa8\x56\xab\x57\xd3\xdf\x82\xed\x52\x9f\xff"
      "\xf9\x42\x3e\x14\x7e\x8b\x4b\xef\x8e\xb5\x6d\x9c\xcf\xf5\x5b\xdb\x91\x3b"
      "\xf7\x37\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\xa8\xf7\x5f\x00\x00\x00\xff\xff\x1f\x7d\x23\xe3",
      1526);
  syz_mount_image(/*fs=*/0x200000000140, /*dir=*/0x200000000200,
                  /*flags=MS_REC*/ 0x4000, /*opts=*/0x200000001400,
                  /*chdir=*/0xd, /*size=*/0x5f6, /*img=*/0x200000000c00);
  //  chdir arguments: [
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //  ]
  memcpy((void*)0x200000000140, "./file0\000", 8);
  syscall(__NR_chdir, /*dir=*/0x200000000140ul);
  //  symlink arguments: [
  //    old: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 00} (length 0xfd)
  //    }
  //    new: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 00} (length 0xfe)
  //    }
  //  ]
  memcpy((void*)0x200000000540,
         "./"
         "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
         253);
  memcpy((void*)0x200000000640,
         "./"
         "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
         254);
  syscall(__NR_symlink, /*old=*/0x200000000540ul, /*new=*/0x200000000640ul);
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x8 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x51a (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x51a)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x2000000004c0, "ext4\000", 5);
  memcpy((void*)0x200000000240, "./file0\000", 8);
  *(uint8_t*)0x200000000000 = 0;
  memcpy(
      (void*)0x200000001200,
      "\x78\x9c\xec\xdd\x4f\x6c\x23\x57\x19\x00\xf0\x6f\x26\xc9\xda\x9b\xa6\x4d"
      "\x0a\x3d\x00\x2a\x74\x29\x85\x05\xad\xd6\x4e\xbc\x6d\x54\xf5\x42\x39\x55"
      "\x08\x55\x42\xf4\xc8\x61\x1b\x12\x27\x8a\x62\xc7\x51\xec\x94\x26\xec\x21"
      "\x7b\xe4\x8e\x44\x25\x4e\x70\xe2\xcc\x01\x89\x03\x52\x4f\xdc\x91\x38\xc0"
      "\x8d\x4b\x39\x20\x15\x58\x81\x1a\x24\x24\x5c\x79\x6c\x67\x9d\x3f\x4e\xac"
      "\x6c\x62\x6f\xe3\xdf\x4f\x1a\xf9\xcd\xbc\xb1\xbf\xf7\x76\x34\xef\x59\x9f"
      "\x37\xf3\x02\x18\x5b\xb7\x22\x62\x3f\x22\x6e\x44\xc4\xbb\x11\x31\xdb\x39"
      "\x9e\x74\xb6\x78\xb3\xbd\xb5\xce\xfb\xe4\xd1\x83\xe5\x83\x47\x0f\x96\x93"
      "\x68\x36\xdf\xf9\x67\x92\xd5\xb7\x8e\x45\xcf\x7b\x5a\x9e\xe9\x7c\x66\x3e"
      "\x22\x7e\xf0\x56\xc4\x8f\x92\x63\x41\xff\x14\x51\xdf\xdd\xdb\x58\xaa\x54"
      "\xca\xdb\x9d\x43\xc5\x46\x75\xab\x58\xdf\xdd\xbb\xbb\x5e\x5d\x5a\x2b\xaf"
      "\x95\x37\x4b\xa5\xc5\x85\xc5\xf9\xd7\xef\xbd\x56\xba\xb4\xbe\xbe\x54\xfd"
      "\xcd\xc7\x37\x23\xe2\xf7\xbf\xfb\xf2\x47\x7f\xdc\xff\xd6\x4f\x5a\xcd\x9a"
      "\xe9\xd4\xf5\xf6\xe3\x32\xb5\xbb\x3e\x75\x18\xa7\x65\x32\x22\xbe\x77\x15"
      "\xc1\x46\x60\xa2\xd3\x9f\x1b\x17\x79\xf3\x85\xde\xc4\x65\x4a\x23\xe2\x73"
      "\x11\xf1\x72\x76\xff\xcf\xc6\x44\x76\x35\x8f\x3a\x7a\x99\xbe\x3d\xc4\xd6"
      "\x01\x00\x57\xa1\xd9\x9c\x8d\xe6\x6c\xef\x3e\x00\x70\xdd\xa5\x59\x0e\x2c"
      "\x49\x0b\x9d\x5c\xc0\x4c\xa4\x69\xa1\xd0\xce\xe1\xbd\x10\xd3\x69\xa5\x56"
      "\x6f\xdc\x59\xad\xed\x6c\xae\xb4\x73\x65\x73\x31\x95\xae\xae\x57\xca\xf3"
      "\x9d\x5c\xe1\x5c\x4c\x25\xab\xeb\x93\xe5\x85\xac\xdc\xdd\xaf\x94\x4b\xc7"
      "\xf6\xef\x45\xc4\xf3\x11\xf1\xb3\xdc\xcd\x6c\xbf\xb0\x5c\xab\xac\x8c\xf2"
      "\x8b\x0f\x00\x8c\xb1\x67\x8e\xcd\xff\xff\xc9\xb5\xe7\x7f\x00\xe0\x9a\xcb"
      "\x3f\x2e\xe6\x46\xd9\x0e\x00\x60\x78\xf2\xa3\x6e\x00\x00\x30\x74\xe6\x7f"
      "\x00\x18\x3f\xe6\x7f\x00\x18\x3f\xe6\x7f\x00\x18\x3f\xe6\x7f\x00\x18\x3f"
      "\xe6\x7f\x00\x18\x2b\xdf\x7f\xfb\xed\xd6\xd6\x3c\xe8\x3c\xff\x7a\xe5\xbd"
      "\xdd\x9d\x8d\xda\x7b\x77\x57\xca\xf5\x8d\x42\x75\x67\xb9\xb0\x5c\xdb\xde"
      "\x2a\xac\xd5\x6a\x6b\xd9\x33\x7b\xaa\xe7\x7d\x5e\xa5\x56\xdb\x5a\x78\x35"
      "\x76\xde\x2f\x36\xca\xf5\x46\xb1\xbe\xbb\x77\xbf\x5a\xdb\xd9\x6c\xdc\xcf"
      "\x9e\xeb\x7d\xbf\x3c\x35\x94\x5e\x01\x00\x67\x79\xfe\xa5\x0f\xff\x92\x44"
      "\xc4\xfe\x1b\x37\xb3\x2d\x7a\x9e\xf7\x7f\xee\x5c\xfd\xe2\x55\xb7\x0e\xb8"
      "\x4a\xe9\xa8\x1b\x00\x8c\xcc\xc4\xa8\x1b\x00\x8c\xcc\xc9\xd5\xbe\x80\x71"
      "\x21\x1f\x0f\xe3\xeb\xff\xcd\x66\x33\x7a\xd6\xee\x8d\x88\x87\x87\xa5\x9e"
      "\x87\x81\xf6\xfd\x2f\x42\x1f\x0c\x14\x26\xb5\x6e\x28\x3c\x7d\x6e\x7f\xf1"
      "\x09\xf2\xff\xc0\x67\x9a\xfc\x3f\x8c\xaf\x8b\xe5\xff\x7d\x97\x87\xeb\x40"
      "\xfe\x1f\xc6\x57\xb3\x99\x58\xf3\x1f\x00\xc6\x8c\x1c\x3f\x90\x9c\x53\xdf"
      "\xfb\xfb\xff\x7c\xb3\x67\x67\xb0\xdf\xff\x01\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x5a"
      "\x9a\xc9\xb6\x24\x2d\x74\xd6\x02\x9f\x89\x34\x2d\x14\x22\x9e\x8d\x88\xb9"
      "\x98\x4a\x56\xd7\x2b\xe5\xf9\x88\x78\x2e\x22\xfe\x9c\x9b\xca\xb5\xf6\x17"
      "\x22\xc2\xba\x41\x00\xf0\x59\x96\xfe\x3d\xe9\xac\xff\x75\x7b\xf6\x95\x99"
      "\xe3\xb5\x37\x72\xff\xcd\x65\xaf\x11\xf1\xe3\x5f\xbc\xf3\xf3\xf7\x97\x1a"
      "\x8d\xed\x85\x88\x1b\xc9\xbf\x0e\x8f\x37\x3e\xe8\x1c\x2f\x8d\xa2\xfd\x00"
      "\xc0\x79\xba\xf3\x74\x77\x1e\xef\xfa\xe4\xd1\x83\xe5\xee\x36\xcc\xf6\x7c"
      "\xfc\x9d\xf6\xe2\xa2\xad\xb8\x07\x9d\xad\x5d\x33\x19\x93\xd9\x6b\x3e\xcb"
      "\x35\x4c\xff\x3b\xe9\xec\xb7\xb5\xbe\xaf\x4c\x5c\x42\xfc\xfd\x87\x11\xf1"
      "\x85\xd3\xfa\x9f\x64\xb9\x91\xb9\xce\xca\xa7\xc7\xe3\xb7\x62\x3f\x3b\xd4"
      "\xf8\xe9\x91\xf8\x69\x56\xd7\x7e\x6d\xfd\x5b\x7c\xfe\x12\xda\x02\xe3\xe6"
      "\xc3\xd6\xf8\xf3\xe6\x69\xf7\x5f\x1a\xb7\xb2\xd7\xd3\xef\xff\x7c\x36\x42"
      "\x3d\xb9\xee\xf8\x77\x70\x62\xfc\x4b\x0f\xc7\xbf\x89\x3e\xe3\xdf\xad\x41"
      "\x63\xbc\xfa\x87\xef\x9e\x38\xd8\x9c\x6d\xd7\x3d\x8c\xf8\xd2\x64\xc4\x41"
      "\xf7\xc3\x7b\xc6\x9f\x6e\xfc\xa4\x4f\xfc\x57\x06\x8c\xff\xd7\x17\xbf\xf2"
      "\x72\xbf\xba\xe6\x2f\x23\x6e\xc7\x69\xfd\x4f\x8e\xc4\x2a\x36\xaa\x5b\xc5"
      "\xfa\xee\xde\xdd\xf5\xea\xd2\x5a\x79\xad\xbc\x59\x2a\x2d\x2e\x2c\xce\xbf"
      "\x7e\xef\xb5\x52\x31\xcb\x51\x17\xbb\x99\xea\x93\xfe\xf1\xc6\x9d\xe7\xfa"
      "\xc5\x6f\xf5\x7f\xba\x4f\xfc\xfc\x39\xfd\xff\xfa\x80\xfd\xff\xd5\xff\xde"
      "\xfd\xe1\x57\xcf\x88\xff\xcd\xaf\x9d\x7e\xfd\x5f\x38\x23\x7e\x6b\x4e\xfc"
      "\xc6\x80\xf1\x97\xa6\x7f\x9b\xef\x57\xd7\x8a\xbf\xd2\xa7\xff\xe7\x5d\xff"
      "\x3b\x03\xc6\xff\xe8\x6f\x7b\x2b\x03\x9e\x0a\x00\x0c\x41\x7d\x77\x6f\x63"
      "\xa9\x52\x29\x6f\x3f\x79\x21\x7f\xe6\x39\xe9\x65\x84\x18\xa0\x90\x44\xec"
      "\x5f\x71\x88\xc7\x85\xdc\xaf\x7f\xfa\xd6\xf9\x27\xe7\x86\xd6\x9e\x0b\x16"
      "\xa2\x5f\xd5\xc4\xd3\xd2\xc2\x6b\x53\xc8\x3d\x1d\xcd\x18\xa0\x30\xea\x91"
      "\x09\xb8\x6a\x8f\x6f\xfa\x51\xb7\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\xe8\x67\x18\x7f\x4e\x34\xea\x3e\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x70\x7d"
      "\x7d\x1a\x00\x00\xff\xff\x8f\x8f\xd6\xd8",
      1306);
  syz_mount_image(/*fs=*/0x2000000004c0, /*dir=*/0x200000000240,
                  /*flags=MS_NOEXEC*/ 8, /*opts=*/0x200000000000, /*chdir=*/1,
                  /*size=*/0x51a, /*img=*/0x200000001200);
  //  ftruncate arguments: [
  //    fd: fd (resource)
  //    len: intptr = 0x2007ffc (8 bytes)
  //  ]
  syscall(__NR_ftruncate, /*fd=*/(intptr_t)-1, /*len=*/0x2007ffcul);
  //  sendfile arguments: [
  //    fdout: fd (resource)
  //    fdin: fd (resource)
  //    off: nil
  //    count: intptr = 0x800000009 (8 bytes)
  //  ]
  syscall(__NR_sendfile, /*fdout=*/(intptr_t)-1, /*fdin=*/(intptr_t)-1,
          /*off=*/0ul, /*count=*/0x800000009ul);
  //  syz_open_dev$loop arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6c 6f 6f 70 23 00} (length 0xb)
  //    }
  //    id: intptr = 0x0 (8 bytes)
  //    flags: open_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_loop
  memcpy((void*)0x200000000140, "/dev/loop#\000", 11);
  res = -1;
  res = syz_open_dev(/*dev=*/0x200000000140, /*id=*/0, /*flags=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$LOOP_SET_STATUS arguments: [
  //    fd: fd_loop (resource)
  //    cmd: const = 0x4c02 (4 bytes)
  //    arg: ptr[in, loop_info] {
  //      loop_info {
  //        lo_number: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        lo_device: alignptr[const[0, int16]] {
  //          v: const = 0x0 (2 bytes)
  //          pad = 0x0 (6 bytes)
  //        }
  //        lo_inode: const = 0x0 (8 bytes)
  //        lo_rdevice: alignptr[const[0, int16]] {
  //          v: const = 0x0 (2 bytes)
  //          pad = 0x0 (6 bytes)
  //        }
  //        lo_offset: int32 = 0x20007 (4 bytes)
  //        lo_enc_type: lo_encrypt_type = 0x0 (4 bytes)
  //        lo_enc_key_size: int32 = 0x200000 (4 bytes)
  //        lo_flags: lo_flags = 0xd (4 bytes)
  //        lo_name: buffer: {22 53 6a f3 9b 7c 7c b7 43 5b 0a bd 07 2d bc 3a 9a
  //        da 34 cc 97 af 10 fd 4f cc a1 57 48 32 8c 53 09 c3 9f b6 98 9b a7 43
  //        d3 0b 59 c4 91 a7 b3 e7 4d 93 89 81 06 13 83 37 4a 1d 79 47 1a 2d 2d
  //        fe} (length 0x40) lo_enc_key: buffer: {04 10 b1 61 7b 62 17 91 7d 72
  //        32 2c 0c 5a a9 26 36 26 c0 24 00 10 f9 db 74 16 1c cf f2 c5 cf 5e}
  //        (length 0x20) lo_init: array[intptr] {
  //          intptr = 0x3 (8 bytes)
  //          intptr = 0x800 (8 bytes)
  //        }
  //        reserved: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000300 = 0;
  *(uint16_t*)0x200000000308 = 0;
  *(uint64_t*)0x200000000310 = 0;
  *(uint16_t*)0x200000000318 = 0;
  *(uint32_t*)0x200000000320 = 0x20007;
  *(uint32_t*)0x200000000324 = 0;
  *(uint32_t*)0x200000000328 = 0x200000;
  *(uint32_t*)0x20000000032c = 0xd;
  memcpy((void*)0x200000000330,
         "\x22\x53\x6a\xf3\x9b\x7c\x7c\xb7\x43\x5b\x0a\xbd\x07\x2d\xbc\x3a\x9a"
         "\xda\x34\xcc\x97\xaf\x10\xfd\x4f\xcc\xa1\x57\x48\x32\x8c\x53\x09\xc3"
         "\x9f\xb6\x98\x9b\xa7\x43\xd3\x0b\x59\xc4\x91\xa7\xb3\xe7\x4d\x93\x89"
         "\x81\x06\x13\x83\x37\x4a\x1d\x79\x47\x1a\x2d\x2d\xfe",
         64);
  memcpy((void*)0x200000000370,
         "\x04\x10\xb1\x61\x7b\x62\x17\x91\x7d\x72\x32\x2c\x0c\x5a\xa9\x26\x36"
         "\x26\xc0\x24\x00\x10\xf9\xdb\x74\x16\x1c\xcf\xf2\xc5\xcf\x5e",
         32);
  *(uint64_t*)0x200000000390 = 3;
  *(uint64_t*)0x200000000398 = 0x800;
  *(uint32_t*)0x2000000003a0 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4c02, /*arg=*/0x200000000300ul);
  //  mknod$loop arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 00}
  //      (length 0xfa)
  //    }
  //    mode: mknod_mode = 0x0 (8 bytes)
  //    dev: proc = 0x0 (4 bytes)
  //  ]
  memcpy((void*)0x200000000000,
         "./"
         "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
         "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
         250);
  syscall(__NR_mknod, /*file=*/0x200000000000ul, /*mode=*/0ul, /*dev=*/0x700);
}
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);
  setup_sysctl();
  const char* reason;
  (void)reason;
  use_temporary_dir();
  loop();
  return 0;
}