// https://syzkaller.appspot.com/bug?id=36a7339ad3c78ba32129eb1deec5b180f7ab1e6e
// 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 __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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 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;
}

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");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      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;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 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 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x2a10044 (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 {
  //              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 {
  //              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 {
  //              bsddf: buffer: {62 73 64 64 66} (length 0x5)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nolazytime: buffer: {6e 6f 6c 61 7a 79 74 69 6d 65} (length
  //              0xa)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              resuid: fs_opt["resuid", fmt[hex, uid]] {
  //                name: buffer: {72 65 73 75 69 64} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: uid (resource)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              lazytime: buffer: {6c 61 7a 79 74 69 6d 65} (length 0x8)
  //            }
  //            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 {
  //              stripe: fs_opt["stripe", fmt[hex, int32]] {
  //                name: buffer: {73 74 72 69 70 65} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: int32 = 0x5 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              bh: buffer: {62 68} (length 0x2)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              init_itable: buffer: {69 6e 69 74 5f 69 74 61 62 6c 65}
  //              (length 0xb)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0xfc (1 bytes)
  //    size: len = 0x56f (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x56f)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x2000000001c0, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x200000000340, "./file0\000", 8));
  NONFAILING(memcpy((void*)0x200000000440, "nodelalloc", 10));
  NONFAILING(*(uint8_t*)0x20000000044a = 0x2c);
  NONFAILING(memcpy((void*)0x20000000044b, "resgid", 6));
  NONFAILING(*(uint8_t*)0x200000000451 = 0x3d);
  NONFAILING(sprintf((char*)0x200000000452, "0x%016llx", (long long)0));
  NONFAILING(*(uint8_t*)0x200000000464 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000465, "bsddf", 5));
  NONFAILING(*(uint8_t*)0x20000000046a = 0x2c);
  NONFAILING(memcpy((void*)0x20000000046b, "nolazytime", 10));
  NONFAILING(*(uint8_t*)0x200000000475 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000476, "resuid", 6));
  NONFAILING(*(uint8_t*)0x20000000047c = 0x3d);
  NONFAILING(sprintf((char*)0x20000000047d, "0x%016llx", (long long)0));
  NONFAILING(*(uint8_t*)0x20000000048f = 0x2c);
  NONFAILING(memcpy((void*)0x200000000490, "lazytime", 8));
  NONFAILING(*(uint8_t*)0x200000000498 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000499, "errors=remount-ro", 17));
  NONFAILING(*(uint8_t*)0x2000000004aa = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004ab, "stripe", 6));
  NONFAILING(*(uint8_t*)0x2000000004b1 = 0x3d);
  NONFAILING(sprintf((char*)0x2000000004b2, "0x%016llx", (long long)5));
  NONFAILING(*(uint8_t*)0x2000000004c4 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004c5, "bh", 2));
  NONFAILING(*(uint8_t*)0x2000000004c7 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004c8, "init_itable", 11));
  NONFAILING(*(uint8_t*)0x2000000004d3 = 0x2c);
  NONFAILING(*(uint8_t*)0x2000000004d4 = 0);
  NONFAILING(memcpy(
      (void*)0x200000003780,
      "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\xd3\xee\xa7\xae\x83"
      "\x31\xd4\x07\x19\xec\xc1\xc9\x5c\xba\xb6\xfe\x98\x20\x38\x1f\x45\x87\x03"
      "\x7d\x9f\xa1\xcd\xca\x68\xba\x8c\x26\x1d\x6b\x1d\xb8\x3d\xb8\x17\x5f\x64"
      "\x08\x22\x0e\xc4\x3f\xc0\x77\x1f\x87\xff\x80\x7f\xc5\x40\x07\x43\x46\xd1"
      "\x07\x11\x22\x37\xbd\xe9\xb2\x36\x69\xda\x2e\x33\xd9\xf2\xf9\xc0\x6d\xcf"
      "\xc9\xbd\xb7\xe7\x7e\x73\xee\xf7\xf6\x9c\xdc\x84\x04\x30\xb4\x8e\xa5\x3f"
      "\x72\x11\x2f\x47\xc4\x37\x49\xc4\xa1\x96\x75\xf9\xc8\x56\x1e\x5b\xdb\x6e"
      "\xf5\xe1\xf5\x99\x74\x49\xa2\x5e\xff\xf4\xcf\x24\x92\xec\xb1\xe6\xf6\x49"
      "\xf6\xfb\x40\x56\x79\x29\x22\x7e\xfd\x2a\xe2\x64\x6e\x73\xbb\xd5\xe5\x95"
      "\xf9\x62\xb9\x5c\x5a\xcc\xea\x13\xb5\x85\x2b\x13\xd5\xe5\x95\x53\x97\x16"
      "\x8a\x73\xa5\xb9\xd2\xe5\xa9\xe9\xe9\x33\x6f\x4d\x4f\xbd\xfb\xce\xdb\x3d"
      "\x8b\xf5\xf5\xf3\x7f\x7f\xff\xc9\xdd\x0f\xcf\x7c\x7d\x7c\xf5\xbb\x9f\xef"
      "\x1f\xbe\x9d\xc4\xd9\x38\x98\xad\x6b\x8d\xe3\x09\xdc\x68\xad\x1c\x2b\xfe"
      "\x9b\x95\x46\xe3\xec\x86\x0d\x27\x7b\xd0\xd8\x20\x49\xfa\x7d\x00\xec\xca"
      "\x48\x96\xe7\xa3\x91\x5e\x03\x0e\xc5\x48\x96\xf5\xc0\xf3\xef\xcb\x88\xa8"
      "\x03\x43\x2a\x91\xff\x30\xa4\x9a\xe3\x80\xe6\xdc\xbe\x47\xf3\xe0\x67\xc6"
      "\x83\x0f\xd6\x26\x40\x8d\xd8\xc7\x5a\xe3\xcf\xaf\xbd\x36\x12\x7b\x1b\x73"
      "\xa3\xfd\xab\xc9\x63\x33\xa3\x74\xbe\x3b\xde\x83\xf6\xd3\x36\x7e\xf9\xe3"
      "\xce\xed\x74\x89\xad\x5f\x87\xd8\xd7\xa5\x0e\xb0\x23\x37\x6e\x46\xc4\xe9"
      "\x7c\x7e\xf3\xf5\x3f\xc9\xae\x7f\xbb\x77\xba\xf1\xe2\xf1\xd6\x36\xb6\x31"
      "\x6c\xff\x7f\xa0\x9f\xee\xa6\xe3\x9f\x37\xda\x8d\xff\x72\xeb\xe3\x9f\x68"
      "\x33\xfe\x39\xd0\x26\x77\x77\xa3\x7b\xfe\xe7\xee\xf7\xa0\x99\x8e\xd2\xf1"
      "\xdf\x7b\x6d\xc7\xbf\xeb\x97\xae\xf1\x91\xac\xf6\x42\x63\xcc\x37\x9a\x5c"
      "\xbc\x54\x2e\x9d\x8e\x88\x17\x23\xe2\x44\xd4\xbb\xde\xfa\x38\xb3\x7a\xaf"
      "\xde\x69\x5d\xeb\xf8\x2f\x5d\xd2\xf6\x9b\x63\xc1\xec\x38\xee\xe7\xf7\x3c"
      "\xbe\xcf\x6c\xb1\x56\x8c\x88\xb1\x5d\x86\xfc\x98\x07\x37\x23\x5e\xc9\xb7"
      "\x8b\x3f\x59\xef\xff\xa4\x4d\xff\xa7\xcf\xc7\xf9\x6d\xb6\x71\xb4\x74\xe7"
      "\xd5\x4e\xeb\xba\xc7\xff\x74\xd5\x7f\x8a\x78\xad\x6d\xff\x3f\xea\xd6\x64"
      "\xeb\xfb\x93\x13\x8d\xf3\x61\xa2\x79\x56\x6c\xf6\xd7\xad\xa3\xbf\x75\x6a"
      "\xbf\xdf\xf1\xa7\xfd\xbf\x7f\xeb\xf8\xc7\x93\xd6\xfb\xb5\xd5\x9d\xb7\xf1"
      "\xe3\xde\x7f\x4a\x9d\xd6\xed\xf6\xfc\x1f\x4b\x3e\x6b\x94\x9b\x49\x70\xad"
      "\x58\xab\x2d\x4e\x46\x8c\x25\x1f\x6f\x7e\x7c\xea\xd1\xbe\xcd\x7a\x73\xfb"
      "\x34\xfe\x13\xc7\xb7\xbe\xfe\xb5\x3b\xff\xd3\xc9\xd7\xe7\xdb\x8c\xff\xd6"
      "\x91\x5b\x1d\x37\x1d\x84\xfe\x9f\xdd\x51\xff\xef\xbc\x70\xef\xa3\x2f\x7e"
      "\xe8\xd4\xfe\xf6\xfa\xff\xcd\x46\xe9\x44\xf6\x48\x76\xfd\x6b\x2f\x3b\x57"
      "\xb6\x7b\x80\x4f\xfa\xfc\x01\x00\x00\x00\x00\x00\xc0\x20\xc9\x45\xc4\xc1"
      "\x48\x72\x85\xf5\x72\x2e\x57\x28\xac\xbd\xbf\xe3\x48\xec\xcf\x95\x2b\xd5"
      "\xda\xc9\x8b\x95\xa5\xcb\xb3\xd1\xf8\xac\xec\x78\x8c\xe6\x9a\x77\xba\x0f"
      "\xb5\xbc\x1f\x62\x32\x7b\x3f\x6c\xb3\x3e\xb5\xa1\x3e\x1d\x11\x87\x23\xe2"
      "\xdb\x91\x7d\x8d\x7a\x61\xa6\x52\x9e\xed\x77\xf0\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x20\x0e\x74\xf8\xfc\x7f\xea\xf7"
      "\x91\x7e\x1f\x1d\xf0\xd4\x35\xbe\xd8\x60\x4f\xbf\x8f\x02\xe8\x87\xae\x5f"
      "\xf9\xdf\x8b\x6f\x7a\x02\x06\x52\xd7\xfc\x07\x9e\x5b\xf2\x1f\x86\x97\xfc"
      "\x87\xe1\x25\xff\x61\x78\xc9\x7f\x18\x5e\xf2\x1f\x86\x97\xfc\x87\xe1\x25"
      "\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\xa0\xa7\xce\x9f\x3b\x97\x2e\xf5\xd5\x87\xd7\x67\xd2\xfa"
      "\xec\xd5\xe5\xa5\xf9\xca\xd5\x53\xb3\xa5\xea\x7c\x61\x61\x69\xa6\x30\x53"
      "\x59\xbc\x52\x98\xab\x54\xe6\xca\xa5\xc2\x4c\x65\xa1\xdb\xdf\x2b\x57\x2a"
      "\x57\x26\xa7\x62\xe9\xda\x44\xad\x54\xad\x4d\x54\x97\x57\x2e\x2c\x54\x96"
      "\x2e\xd7\x2e\x5c\x5a\x28\xce\x95\x2e\x94\x46\xff\x97\xa8\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\xd9\x52\x5d\x5e\x99\x2f"
      "\x96\xcb\xa5\x45\x85\x8e\x85\xf7\x63\x20\x0e\xe3\x69\x06\xb8\x66\x57\xbb"
      "\xe7\x07\x25\x0a\x85\x0e\x85\x9b\x59\xf7\xee\x6c\xaf\x3e\x5e\x94\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x60\x83\xff\x02\x00\x00\xff"
      "\xff\x8c\x8b\x31\x9a",
      1391));
  NONFAILING(syz_mount_image(
      /*fs=*/0x2000000001c0, /*dir=*/0x200000000340,
      /*flags=MS_LAZYTIME|MS_I_VERSION|MS_POSIXACL|MS_RELATIME|MS_NODEV|MS_MANDLOCK*/
      0x2a10044, /*opts=*/0x200000000440, /*chdir=*/0xfc, /*size=*/0x56f,
      /*img=*/0x200000003780));
  //  syz_mount_image$fuse arguments: [
  //    fs: nil
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: mount_flags = 0x3000009 (8 bytes)
  //    opts: nil
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: const = 0x0 (8 bytes)
  //    img: nil
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x2000000000c0, "./bus\000", 6));
  NONFAILING(syz_mount_image(
      /*fs=*/0, /*dir=*/0x2000000000c0,
      /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_RDONLY|MS_NOEXEC*/ 0x3000009,
      /*opts=*/0, /*chdir=*/1, /*size=*/0, /*img=*/0));
  //  mount$overlay arguments: [
  //    src: const = 0x0 (8 bytes)
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {6f 76 65 72 6c 61 79 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x10000 (8 bytes)
  //    opts: ptr[in, fs_options[overlay_options]] {
  //      fs_options[overlay_options] {
  //        elems: array[fs_opt_elem[overlay_options]] {
  //          fs_opt_elem[overlay_options] {
  //            elem: union overlay_options {
  //              workdir: fs_opt["workdir", stringnoz[filename]] {
  //                name: buffer: {77 6f 72 6b 64 69 72} (length 0x7)
  //                eq: const = 0x3d (1 bytes)
  //                val: buffer: {2e 2f 62 75 73} (length 0x5)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[overlay_options] {
  //            elem: union overlay_options {
  //              lowerdir: fs_opt["lowerdir", stringnoz[filename]] {
  //                name: buffer: {6c 6f 77 65 72 64 69 72} (length 0x8)
  //                eq: const = 0x3d (1 bytes)
  //                val: buffer: {2e} (length 0x1)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[overlay_options] {
  //            elem: union overlay_options {
  //              upperdir: fs_opt["upperdir", stringnoz[filename]] {
  //                name: buffer: {75 70 70 65 72 64 69 72} (length 0x8)
  //                eq: const = 0x3d (1 bytes)
  //                val: buffer: {2e 2f 66 69 6c 65 30} (length 0x7)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(memcpy((void*)0x200000000240, "./file0\000", 8));
  NONFAILING(memcpy((void*)0x200000000b80, "overlay\000", 8));
  NONFAILING(memcpy((void*)0x200000000080, "workdir", 7));
  NONFAILING(*(uint8_t*)0x200000000087 = 0x3d);
  NONFAILING(memcpy((void*)0x200000000088, "./bus", 5));
  NONFAILING(*(uint8_t*)0x20000000008d = 0x2c);
  NONFAILING(memcpy((void*)0x20000000008e, "lowerdir", 8));
  NONFAILING(*(uint8_t*)0x200000000096 = 0x3d);
  NONFAILING(memset((void*)0x200000000097, 46, 1));
  NONFAILING(*(uint8_t*)0x200000000098 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000099, "upperdir", 8));
  NONFAILING(*(uint8_t*)0x2000000000a1 = 0x3d);
  NONFAILING(memcpy((void*)0x2000000000a2, "./file0", 7));
  NONFAILING(*(uint8_t*)0x2000000000a9 = 0x2c);
  NONFAILING(*(uint8_t*)0x2000000000aa = 0);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000240ul,
          /*type=*/0x200000000b80ul, /*flags=MS_POSIXACL*/ 0x10000ul,
          /*opts=*/0x200000000080ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 2f 66 69 6c 65 30 00} (length 0xe)
  //    }
  //    flags: open_flags = 0x80182 (4 bytes)
  //    mode: open_mode = 0xc9 (2 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x2000000000c0, "./file0/file0\000", 14));
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x2000000000c0ul,
                /*flags=O_NOCTTY|O_EXCL|O_CLOEXEC|O_RDWR*/ 0x80182,
                /*mode=S_IXOTH|S_IXGRP|S_IXUSR|S_IWUSR*/ 0xc9);
  if (res != -1)
    r[0] = res;
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 32 00} (length 0x8)
  //    }
  //    flags: open_flags = 0x42 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x200000000440, "./file2\000", 8));
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000440ul,
                /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  pwrite64 arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {95} (length 0x1)
  //    }
  //    count: len = 0x1 (8 bytes)
  //    pos: intptr = 0x800 (8 bytes)
  //  ]
  NONFAILING(memset((void*)0x200000000180, 149, 1));
  syscall(__NR_pwrite64, /*fd=*/r[0], /*buf=*/0x200000000180ul, /*count=*/1ul,
          /*pos=*/0x800ul);
  //  ioctl$EXT4_IOC_MOVE_EXT arguments: [
  //    fd: fd (resource)
  //    cmd: const = 0xc028660f (4 bytes)
  //    arg: ptr[in, move_extent] {
  //      move_extent {
  //        reserved: const = 0x0 (4 bytes)
  //        donor_fd: fd (resource)
  //        orig_start: int64 = 0x0 (8 bytes)
  //        donor_start: int64 = 0x0 (8 bytes)
  //        len: int64 = 0x4 (8 bytes)
  //        moved_len: int64 = 0x1000000000000 (8 bytes)
  //      }
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x200000000040 = 0);
  NONFAILING(*(uint32_t*)0x200000000044 = r[0]);
  NONFAILING(*(uint64_t*)0x200000000048 = 0);
  NONFAILING(*(uint64_t*)0x200000000050 = 0);
  NONFAILING(*(uint64_t*)0x200000000058 = 4);
  NONFAILING(*(uint64_t*)0x200000000060 = 0x1000000000000);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xc028660f,
          /*arg=*/0x200000000040ul);
}
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;
  install_segv_handler();
  loop();
  return 0;
}