// https://syzkaller.appspot.com/bug?id=e494b346b7af60065f34205d042ed58f28b07d47
// 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;
}

//% 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$erofs arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 72 6f 66 73 00} (length 0x6)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {00 ea 2e b3 4e 7e a5 1c 94 46 c5 5a 2d 1e 0b e3
  //          9a f9 fa f4 4a d5 9c b6 ad 1c 94 49 0d 97 0e 81 14 39 ed dd c7 1c
  //          9b 18 94 6b 55 9c e5 3b ee 0a 1a be 56 2f c3 f3 89 8e 58 26 ed a1
  //          96 2c f6 e3 c4 c0 ad e5 21 51 92 3a 70 b4 6e ac fc 1a aa eb cf 15
  //          6e 54 9e 88 4b ca bc 13 33 f3 44 f3 1c d3 0c d9 3c b2 81 4e 0d bc
  //          24 a7 a1 07 e2 95 e8 6e 09 28 3c 82 5f e1 77 c8 9c 63 85 f6 8f 2c
  //          84 3c ff ff ff ff 15 53 9b ab 61 42 ce ed 92 65 ba 98 9d 1a 28 3f
  //          c4 ff c8 3f 3a 7a 6c 74 68 23 e6 56 ad 78 f3 b5 a3 36 cd bd 83 da
  //          d5 9e 0d eb b3 6b 4e a5 e6 58 e2 53 f0 16 37 cc 03 f7 04 a0 80 19
  //          f9 5b 92 ff ff ff ff f8 dd 21 55 2d 69 67 ab 1b 01 e5 d5 2a 57 93
  //          eb 17 9d ee e4 57 27 70 a5 19 71 27 b0 90 28 7b ca 2a 4e aa 17 05
  //          b4 2c 16 96 8d 02 01 d3 ba 3c c8 00 00 00 65 7e a0 95 f1 52 b1 b6
  //          a1 e6 ad 8d 24 ad 17 f6 49 cc c2 3d 4e cb cd b5 62 0c c4 8f 95 f5
  //          63 c2 23 0f 85 9d 19 6e 6c 4f 00 b8 e3 a7 b0 1f cb 1d 79 dc c0 9b
  //          7a 85 4e c8 c3 1d d2 7f f9 b4 a2 86 4e 1d ca f7 19 d2 0b 56 76 9d
  //          51 22 8e cc 19 15 fb 8c 8b 59 8c 11 b3 c2 96 b0 5f 9c 53 55 fc 6f
  //          19 a7 b2 8f 5a e9 a0 d0 80 4c cc 57 16 cf ac 02 46 dd ff a2 f1 20
  //          77 a0 2a 95 9a a1 b7 43 73 c3 8b 2b cc 90 74 3b 80 66 6e ae 25 de
  //          a7 3e 12 72 63 b8 fd bc 64 fe 86 2b 99 4c a8 47 3d 00 00 00 00 00
  //          00 00 00} (length 0x19f)
  //        }
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x192 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x192)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000180, "erofs\000", 6);
  memcpy((void*)0x2000000001c0, "./file1\000", 8);
  memcpy(
      (void*)0x200000000900,
      "\x00\xea\x2e\xb3\x4e\x7e\xa5\x1c\x94\x46\xc5\x5a\x2d\x1e\x0b\xe3\x9a\xf9"
      "\xfa\xf4\x4a\xd5\x9c\xb6\xad\x1c\x94\x49\x0d\x97\x0e\x81\x14\x39\xed\xdd"
      "\xc7\x1c\x9b\x18\x94\x6b\x55\x9c\xe5\x3b\xee\x0a\x1a\xbe\x56\x2f\xc3\xf3"
      "\x89\x8e\x58\x26\xed\xa1\x96\x2c\xf6\xe3\xc4\xc0\xad\xe5\x21\x51\x92\x3a"
      "\x70\xb4\x6e\xac\xfc\x1a\xaa\xeb\xcf\x15\x6e\x54\x9e\x88\x4b\xca\xbc\x13"
      "\x33\xf3\x44\xf3\x1c\xd3\x0c\xd9\x3c\xb2\x81\x4e\x0d\xbc\x24\xa7\xa1\x07"
      "\xe2\x95\xe8\x6e\x09\x28\x3c\x82\x5f\xe1\x77\xc8\x9c\x63\x85\xf6\x8f\x2c"
      "\x84\x3c\xff\xff\xff\xff\x15\x53\x9b\xab\x61\x42\xce\xed\x92\x65\xba\x98"
      "\x9d\x1a\x28\x3f\xc4\xff\xc8\x3f\x3a\x7a\x6c\x74\x68\x23\xe6\x56\xad\x78"
      "\xf3\xb5\xa3\x36\xcd\xbd\x83\xda\xd5\x9e\x0d\xeb\xb3\x6b\x4e\xa5\xe6\x58"
      "\xe2\x53\xf0\x16\x37\xcc\x03\xf7\x04\xa0\x80\x19\xf9\x5b\x92\xff\xff\xff"
      "\xff\xf8\xdd\x21\x55\x2d\x69\x67\xab\x1b\x01\xe5\xd5\x2a\x57\x93\xeb\x17"
      "\x9d\xee\xe4\x57\x27\x70\xa5\x19\x71\x27\xb0\x90\x28\x7b\xca\x2a\x4e\xaa"
      "\x17\x05\xb4\x2c\x16\x96\x8d\x02\x01\xd3\xba\x3c\xc8\x00\x00\x00\x65\x7e"
      "\xa0\x95\xf1\x52\xb1\xb6\xa1\xe6\xad\x8d\x24\xad\x17\xf6\x49\xcc\xc2\x3d"
      "\x4e\xcb\xcd\xb5\x62\x0c\xc4\x8f\x95\xf5\x63\xc2\x23\x0f\x85\x9d\x19\x6e"
      "\x6c\x4f\x00\xb8\xe3\xa7\xb0\x1f\xcb\x1d\x79\xdc\xc0\x9b\x7a\x85\x4e\xc8"
      "\xc3\x1d\xd2\x7f\xf9\xb4\xa2\x86\x4e\x1d\xca\xf7\x19\xd2\x0b\x56\x76\x9d"
      "\x51\x22\x8e\xcc\x19\x15\xfb\x8c\x8b\x59\x8c\x11\xb3\xc2\x96\xb0\x5f\x9c"
      "\x53\x55\xfc\x6f\x19\xa7\xb2\x8f\x5a\xe9\xa0\xd0\x80\x4c\xcc\x57\x16\xcf"
      "\xac\x02\x46\xdd\xff\xa2\xf1\x20\x77\xa0\x2a\x95\x9a\xa1\xb7\x43\x73\xc3"
      "\x8b\x2b\xcc\x90\x74\x3b\x80\x66\x6e\xae\x25\xde\xa7\x3e\x12\x72\x63\xb8"
      "\xfd\xbc\x64\xfe\x86\x2b\x99\x4c\xa8\x47\x3d\x00\x00\x00\x00\x00\x00\x00"
      "\x00",
      415);
  memcpy(
      (void*)0x200000009480,
      "\x78\x9c\xec\x98\xbf\x4e\x2a\x41\x14\xc6\xbf\xd9\xe5\x4f\xb8\xb9\x09\xb7"
      "\xbd\xb7\xb9\x26\x92\x80\x85\xcb\xee\xa0\x46\x0a\x0b\x6a\x0b\x4d\x34\x1a"
      "\x3b\x89\xac\x04\x5d\xc4\xc0\x16\x40\xe7\x53\x58\xfb\x04\xd6\xc4\x86\xf7"
      "\xd0\x42\xad\x2c\xc4\xce\xca\x62\xcd\xec\x0e\xee\x80\x7f\xb0\x40\xc5\x78"
      "\x7e\xc5\x99\x6f\x66\x0e\xc3\x99\xb3\xc9\xb7\xc9\x82\x20\x88\x1f\xcb\xf5"
      "\xd5\xfd\xe5\x69\x3a\x95\x10\xfa\x37\x52\x88\xcb\xf5\x1b\x3d\xcc\xd1\x94"
      "\xfc\x4e\xf2\x61\xe6\xbc\xb2\x72\x76\x6c\xde\x5d\x74\xba\xcb\xf9\xe1\xf3"
      "\x18\x00\xcf\x7b\xff\xff\x47\x00\x74\x0b\x3a\x5c\x39\xf7\xbc\xc1\x5f\xa7"
      "\xe4\xb8\x0e\xad\xaf\xa3\xea\xfe\x26\x18\x0c\xa9\xb7\xa1\x61\x43\x6a\x1b"
      "\x0c\x5b\x52\xef\x29\xba\x26\xf2\x0d\x63\xb7\xe2\xd8\xc6\x4e\xcd\x29\x09"
      "\x61\x8a\x60\x89\xc0\x45\xc8\x0d\xd7\xd7\x3b\x62\x28\x29\xf5\x31\x65\xbf"
      "\xd1\x6a\xef\x17\x1d\xc7\xae\x7f\xa0\x18\xd5\xbf\x5e\x41\xc3\x92\x52\x9f"
      "\xfa\xbc\xfa\xbd\x31\xc3\xfe\xc1\x82\x06\x4b\xea\x1c\x18\xd6\xa4\x5e\x44"
      "\xbc\xdf\x9b\xa0\x25\xca\xfd\xff\x45\xc2\xf3\xf5\x4f\xbe\xff\xf7\x16\x7f"
      "\x93\x23\x72\xa2\x98\x94\x52\x49\x8c\x41\x30\x08\x71\x9b\x00\x26\xa3\x9e"
      "\xaf\x12\xa1\x3f\x79\x27\x0c\x69\xc5\x9f\x22\x8a\x7f\x64\xdd\xea\x61\xb6"
      "\xd1\x6a\xcf\x56\xaa\xc5\xb2\x5d\xb6\x0f\x38\xcf\x2d\x98\x73\xa6\x39\xcf"
      "\xb3\xbe\x11\x05\xf1\x0d\xff\x4b\xf8\xfe\xf4\x4b\x39\x3f\xfa\x4a\x6e\x8c"
      "\xc5\xd0\x2c\xba\x6e\xdd\x0a\xe2\xd3\x9c\x37\xe3\x70\xeb\xfc\x25\xc7\x8d"
      "\xf9\xfe\xa7\x21\x33\x1d\x54\xcd\xe4\x9a\x8a\xff\x3e\xf8\xc3\xa6\xc4\x90"
      "\xd1\xe5\x9c\x20\x08\x82\x20\x08\x82\x20\x08\x82\x20\x08\x82\x20\x08\x62"
      "\xec\xfc\x07\xf3\xbf\x82\x0e\x90\x7f\xb6\xc4\x57\xfd\xec\xc7\x00\x00\x00"
      "\xff\xff\x16\x87\x71\x27",
      402);
  syz_mount_image(/*fs=*/0x200000000180, /*dir=*/0x2000000001c0, /*flags=*/0,
                  /*opts=*/0x200000000900, /*chdir=*/1, /*size=*/0x192,
                  /*img=*/0x200000009480);
  //  openat$dir arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 32 00} (length 0x8)
  //    }
  //    flags: open_flags = 0x121140 (4 bytes)
  //    mode: open_mode = 0x13d (2 bytes)
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000000, "./file2\000", 8);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
          /*flags=O_SYNC|O_NOFOLLOW|O_NOCTTY|O_CREAT*/ 0x121140,
          /*mode=S_IXOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IRUSR*/ 0x13d);
  //  openat$sysctl arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 70 72 6f 63 2f 73 79 73 2f 76 6d 2f 64 72 6f 70 5f 63 61
  //      63 68 65 73 00} (length 0x19)
  //    }
  //    flags: const = 0x1 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_sysctl
  memcpy((void*)0x200000000040, "/proc/sys/vm/drop_caches\000", 25);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000040ul, /*flags=*/1, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  writev arguments: [
  //    fd: fd (resource)
  //    vec: ptr[in, array[iovec[in, array[int8]]]] {
  //      array[iovec[in, array[int8]]] {
  //        iovec[in, array[int8]] {
  //          addr: ptr[in, buffer] {
  //            buffer: {32} (length 0x1)
  //          }
  //          len: len = 0x1 (8 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000000c0 = 0x200000000140;
  memset((void*)0x200000000140, 50, 1);
  *(uint64_t*)0x2000000000c8 = 1;
  syscall(__NR_writev, /*fd=*/r[0], /*vec=*/0x2000000000c0ul, /*vlen=*/1ul);
}
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;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}