// https://syzkaller.appspot.com/bug?id=a5a37263bb85dee61db538cb371cf86af5e6ac70
// 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 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);
  }
}

void execute_one(void)
{
  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 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x200000 (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 {
  //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
  //              63 6b} (length 0xe)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              norecovery: buffer: {6e 6f 72 65 63 6f 76 65 72 79} (length
  //              0xa)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              resgid: fs_opt["resgid", fmt[hex, gid]] {
  //                name: buffer: {72 65 73 67 69 64} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: gid (resource)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nojournal_checksum: buffer: {6e 6f 6a 6f 75 72 6e 61 6c 5f 63
  //              68 65 63 6b 73 75 6d} (length 0x12)
  //            }
  //            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 = 0x80 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nodelalloc: buffer: {6e 6f 64 65 6c 61 6c 6c 6f 63} (length
  //              0xa)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              errors_remount: buffer: {65 72 72 6f 72 73 3d 72 65 6d 6f 75
  //              6e 74 2d 72 6f} (length 0x11)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              grpid: buffer: {67 72 70 69 64} (length 0x5)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              auto_da_alloc_val: fs_opt["auto_da_alloc", fmt[hex, int32]] {
  //                name: buffer: {61 75 74 6f 5f 64 61 5f 61 6c 6c 6f 63}
  //                (length 0xd) eq: const = 0x3d (1 bytes) val: int32 = 0x343
  //                (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              grpid: buffer: {67 72 70 69 64} (length 0x5)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              barrier_val: fs_opt["barrier", fmt[hex, int32]] {
  //                name: buffer: {62 61 72 72 69 65 72} (length 0x7)
  //                eq: const = 0x3d (1 bytes)
  //                val: int32 = 0x7 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          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)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //          fs_opt_elem[fs_options_common] {
  //            elem: union fs_options_common {
  //              subj_user: fs_opt["subj_user", stringnoz] {
  //                name: buffer: {73 75 62 6a 5f 75 73 65 72} (length 0x9)
  //                eq: const = 0x3d (1 bytes)
  //                val: buffer: {28} (length 0x1)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[fs_options_common] {
  //            elem: union fs_options_common {
  //              measure: buffer: {6d 65 61 73 75 72 65} (length 0x7)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[fs_options_common] {
  //            elem: union fs_options_common {
  //              uid_gt: fs_opt_nodelim["uid>", fmt[dec, uid]] {
  //                name: buffer: {75 69 64 3e} (length 0x4)
  //                val: uid (resource)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[fs_options_common] {
  //            elem: union fs_options_common {
  //              appraise_type: buffer: {61 70 70 72 61 69 73 65 5f 74 79 70 65
  //              3d 69 6d 61 73 69 67} (length 0x14)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0xfd (1 bytes)
  //    size: len = 0x588 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x588)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000080, "ext4\000", 5);
  memcpy((void*)0x200000000000, "./file1\000", 8);
  memcpy((void*)0x200000000440, "dioread_nolock", 14);
  *(uint8_t*)0x20000000044e = 0x2c;
  memcpy((void*)0x20000000044f, "norecovery", 10);
  *(uint8_t*)0x200000000459 = 0x2c;
  memcpy((void*)0x20000000045a, "resgid", 6);
  *(uint8_t*)0x200000000460 = 0x3d;
  sprintf((char*)0x200000000461, "0x%016llx", (long long)0);
  *(uint8_t*)0x200000000473 = 0x2c;
  memcpy((void*)0x200000000474, "nojournal_checksum", 18);
  *(uint8_t*)0x200000000486 = 0x2c;
  memcpy((void*)0x200000000487, "debug_want_extra_isize", 22);
  *(uint8_t*)0x20000000049d = 0x3d;
  sprintf((char*)0x20000000049e, "0x%016llx", (long long)0x80);
  *(uint8_t*)0x2000000004b0 = 0x2c;
  memcpy((void*)0x2000000004b1, "nodelalloc", 10);
  *(uint8_t*)0x2000000004bb = 0x2c;
  memcpy((void*)0x2000000004bc, "errors=remount-ro", 17);
  *(uint8_t*)0x2000000004cd = 0x2c;
  memcpy((void*)0x2000000004ce, "grpid", 5);
  *(uint8_t*)0x2000000004d3 = 0x2c;
  memcpy((void*)0x2000000004d4, "auto_da_alloc", 13);
  *(uint8_t*)0x2000000004e1 = 0x3d;
  sprintf((char*)0x2000000004e2, "0x%016llx", (long long)0x343);
  *(uint8_t*)0x2000000004f4 = 0x2c;
  memcpy((void*)0x2000000004f5, "grpid", 5);
  *(uint8_t*)0x2000000004fa = 0x2c;
  memcpy((void*)0x2000000004fb, "barrier", 7);
  *(uint8_t*)0x200000000502 = 0x3d;
  sprintf((char*)0x200000000503, "0x%016llx", (long long)7);
  *(uint8_t*)0x200000000515 = 0x2c;
  memcpy((void*)0x200000000516, "nombcache", 9);
  *(uint8_t*)0x20000000051f = 0x2c;
  memcpy((void*)0x200000000520, "subj_user", 9);
  *(uint8_t*)0x200000000529 = 0x3d;
  memset((void*)0x20000000052a, 40, 1);
  *(uint8_t*)0x20000000052b = 0x2c;
  memcpy((void*)0x20000000052c, "measure", 7);
  *(uint8_t*)0x200000000533 = 0x2c;
  memcpy((void*)0x200000000534, "uid>", 4);
  sprintf((char*)0x200000000538, "%020llu", (long long)0);
  *(uint8_t*)0x20000000054c = 0x2c;
  memcpy((void*)0x20000000054d, "appraise_type=imasig", 20);
  *(uint8_t*)0x200000000561 = 0x2c;
  *(uint8_t*)0x200000000562 = 0;
  memcpy(
      (void*)0x200000000680,
      "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\x93\xfd\xea\xb4\x1d"
      "\x8c\xa1\x3e\xc8\x60\x0f\x4e\xc6\xd2\xb5\xf5\xc7\x04\x61\xf3\x51\x74\x38"
      "\xd0\xf7\x19\xda\xac\x8c\xa6\xcb\x68\xd2\xb1\xd6\x81\xdb\x83\x7b\xf1\x45"
      "\x86\x20\xe2\x40\xfc\x03\x7c\xdf\xe3\xf0\x1f\xf0\xaf\x18\xb8\xc1\x90\x51"
      "\xf4\x41\x85\xca\x4d\x6f\xba\xae\xcd\x8f\xb6\xcb\x4c\x5d\x3e\x1f\xc8\x76"
      "\x4e\xce\x4d\xce\xfd\xe6\xde\xef\xcd\x39\xf7\x26\x4d\x00\x03\xeb\x68\xfa"
      "\x4f\x2e\xe2\xd5\x88\xf8\x26\x89\x18\x59\xd7\x96\x8f\xac\xf1\xe8\xea\x72"
      "\xcb\x8f\xaf\x4f\xa5\xb7\x24\x56\x56\x3e\xfd\x3d\x89\x33\x1b\x9e\x2b\xc9"
      "\xfe\x1f\xce\x2a\xaf\x44\xc4\x2f\x5f\x45\x9c\xc8\x6d\xee\xb7\xb6\xb8\x34"
      "\x5b\xaa\x54\xca\xf3\x59\x7d\xac\x3e\x77\x65\xac\xb6\xb8\x74\xf2\xd2\x5c"
      "\x69\xa6\x3c\x53\xbe\x3c\x31\x39\x79\xfa\xed\xc9\x89\xf7\xde\x7d\xa7\x67"
      "\xb1\xbe\x79\xfe\xcf\xef\x3f\xb9\xf7\xe1\xe9\xaf\x8f\x2d\x7f\xf7\xf3\xc3"
      "\x43\xb7\x93\x38\x1b\x07\xb3\xb6\x34\xae\x1e\x74\x71\x63\x7d\xe5\x68\xe9"
      "\x9f\xac\x54\x88\xb3\x1b\x16\x1c\xef\x41\x67\xbb\x49\xd2\xef\x15\x60\x47"
      "\x86\xb2\x3c\x2f\x44\x7a\x0c\x18\x89\xa1\x2c\xeb\x81\x17\xdf\x97\x11\xb1"
      "\x02\x0c\xa8\x44\xfe\xc3\x80\x6a\x8e\x03\x9a\x73\xfb\x1e\xcd\x83\xff\x37"
      "\x1e\x7d\xb0\x3a\x01\xda\x1c\x7f\x7e\xf5\xdc\x48\xec\x6b\xcc\x8d\x0e\x2c"
      "\x27\x4f\xcd\x8c\xd2\xf9\xee\x68\x0f\xfa\x4f\xfb\x18\x7d\x70\xe7\xf6\xdd"
      "\x07\x77\x6e\x47\xe7\xf3\x10\xfb\xbb\xd4\x01\xb6\xe5\xc6\xcd\x88\x38\x95"
      "\xcf\x6f\x3e\xfe\x25\xd9\xf1\x6f\xe7\x4e\x35\x4e\x1e\x77\xb6\xb1\x8f\x41"
      "\x7b\xff\x81\x7e\xba\x97\x8e\x7f\x92\x1b\x11\x9b\xf2\x3f\xb7\x36\xfe\x89"
      "\x16\xe3\x9f\xe1\x16\xb9\xbb\x13\xdd\xf3\x3f\xf7\xb0\x07\xdd\xb4\x95\x8e"
      "\xff\xde\x6f\x39\xfe\x5d\x3b\x74\x8d\x0e\x65\xb5\x97\x1a\x63\xbe\x42\x72"
      "\xf1\x52\xa5\x7c\x2a\x22\x5e\x8e\x88\xe3\x51\xd8\x9b\xd6\x3b\x5d\xcf\x39"
      "\xbd\x7c\x7f\xa5\x5d\x5b\x1a\xff\xdd\x6c\xfc\x97\xde\xd2\xfe\x9b\x63\xc1"
      "\x6c\x3d\x1e\xe6\xf7\x3e\xfd\x98\xe9\x52\xbd\xf4\x2c\x31\xaf\xf7\xe8\x66"
      "\xc4\x6b\x2d\xc7\xbf\xc9\xda\xf6\x4f\x5a\x6c\xff\xf4\xf5\x38\xbf\xc5\x3e"
      "\x8e\x94\xef\xbc\xde\xae\xad\x7b\xfc\xcf\xd7\xca\x4f\x11\x6f\xb4\xdc\xfe"
      "\x4f\xae\x68\x25\x9d\xaf\x4f\x8e\x35\xf6\x87\xb1\xe6\x5e\xb1\xd9\x1f\xb7"
      "\x8e\xfc\xda\xae\xff\x7e\xc7\x9f\x6e\xff\x03\x9d\xe3\x1f\x4d\xd6\x5f\xaf"
      "\xad\x6d\xbf\x8f\x1f\xf7\xfd\x55\x6e\xd7\xb6\xd3\xfd\x7f\x4f\xf2\x59\xa3"
      "\xbc\x27\xbb\xef\x5a\xa9\x5e\x9f\x1f\x8f\xd8\x93\x7c\x9c\x1f\xde\x78\xff"
      "\xc4\x93\xc7\x36\xeb\xcd\xe5\xd3\xf8\x8f\x1f\x6b\x9d\xff\x9d\xf6\xff\x74"
      "\xf2\xf5\xf9\x16\xe3\xbf\x75\xf8\x56\xdb\x45\xbb\xc6\xff\xf7\xba\x49\xfa"
      "\x53\x6e\x6e\xb1\xf7\xce\xd2\xf8\xa7\xb7\xb5\xfd\xb7\x5f\xb8\xff\xd1\x17"
      "\x3f\xec\x38\xfe\xc6\xf6\x7f\xab\x51\x3a\x9e\xdd\xb3\x95\xe3\xdf\x56\x57"
      "\xf0\x59\x5e\x3b\x00\x00\x00\x00\x00\x00\xd8\x6d\x72\x11\x71\x30\x92\x5c"
      "\x71\xad\x9c\xcb\x15\x8b\x85\x46\xdb\xe1\x38\x90\xab\x54\x6b\xf5\x13\x17"
      "\xab\x0b\x97\xa7\xa3\xf1\x5d\xd9\xd1\x28\xe4\x9a\x57\xba\x47\xd6\x7d\x1e"
      "\x62\x3c\xfb\x3c\x6c\xb3\x3e\xb1\xa1\x3e\x19\x11\x87\x22\xe2\xdb\xa1\xfd"
      "\x8d\x7a\x71\xaa\x5a\x99\xee\x77\xf0\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\xb0\x4b\x0c\xb7\xfc\xfe\xff\x6a\xdb\x6f\x43\xfd"
      "\x5e\x3b\xe0\xb9\x6b\xfc\xb0\xc1\xde\x7e\xaf\x05\xd0\x0f\x5d\x7f\xf2\xbf"
      "\x17\xbf\xf4\x04\xec\x4a\x5d\xf3\x1f\x78\x61\x6d\x3f\xff\x9d\x19\x80\x17"
      "\x85\xf7\x7f\x18\x5c\xf2\x1f\x06\x97\xfc\x87\xc1\xb5\xd5\xfc\x2f\x8c\x3c"
      "\xe7\x15\x01\xfe\x73\xde\xff\x61\x70\xc9\x7f\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe8\xa9\xf3\xe7"
      "\xce\xa5\xb7\x95\xe5\xc7\xd7\xa7\xd2\xfa\xf4\xd5\xc5\x85\xd9\xea\xd5\x93"
      "\xd3\xe5\xda\x6c\x71\x6e\x61\xaa\x38\x55\x9d\xbf\x52\x9c\xa9\x56\x67\x2a"
      "\xe5\xe2\x54\x75\xae\xdb\xf3\x55\xaa\xd5\x2b\xe3\x13\xb1\x70\x6d\xac\x5e"
      "\xae\xd5\xc7\x6a\x8b\x4b\x17\xe6\xaa\x0b\x97\xeb\x17\x2e\xcd\x95\x66\xca"
      "\x17\xca\x05\x7f\x6c\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x36\xa9\x2d\x2e\xcd\x96\x2a\x95\xf2\xbc\x42\xdb\xc2\x99\xe8"
      "\xe5\x13\x26\xbb\xef\x95\x3f\x93\xad\xd2\x8e\x1e\x9e\xdf\x2d\x51\x28\xf4"
      "\xb4\xd0\xc7\x83\x12\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x6c\xf0\x6f\x00\x00\x00\xff\xff\xd8\x04\x33\xae",
      1416);
  syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000000,
                  /*flags=MS_RELATIME*/ 0x200000, /*opts=*/0x200000000440,
                  /*chdir=*/0xfd, /*size=*/0x588, /*img=*/0x200000000680);
  //  setxattr$trusted_overlay_upper arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 2f 66 69 6c 65 30 00} (length 0xe)
  //    }
  //    name: ptr[in, buffer] {
  //      buffer: {74 72 75 73 74 65 64 2e 6f 76 65 72 6c 61 79 2e 75 70 70 65
  //      72 00} (length 0x16)
  //    }
  //    val: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //      }
  //    }
  //    size: len = 0x835 (8 bytes)
  //    flags: setxattr_flags = 0x0 (8 bytes)
  //  ]
  memcpy((void*)0x200000000380, "./file0/file0\000", 14);
  memcpy((void*)0x2000000001c0, "trusted.overlay.upper\000", 22);
  syscall(__NR_setxattr, /*path=*/0x200000000380ul, /*name=*/0x2000000001c0ul,
          /*val=*/0x200000001400ul, /*size=*/0x835ul, /*flags=*/0ul);
  //  creat arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 2f 66 69 6c 65 30 00} (length 0xe)
  //    }
  //    mode: open_mode = 0x8 (8 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000180, "./file0/file0\000", 14);
  syscall(__NR_creat, /*file=*/0x200000000180ul, /*mode=S_IXGRP*/ 8ul);
}
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;
}