// https://syzkaller.appspot.com/bug?id=753d59fc19d6c114fb4b38588efc2123637ac34a
// 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 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 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++) {
    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 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x3000046 (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 {
  //              delalloc: buffer: {64 65 6c 61 6c 6c 6f 63} (length 0x8)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              data_err_abort: buffer: {64 61 74 61 5f 65 72 72 3d 61 62 6f
  //              72 74} (length 0xe)
  //            }
  //            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 = 0x2 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              dioread_lock: buffer: {64 69 6f 72 65 61 64 5f 6c 6f 63 6b}
  //              (length 0xc)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nouid32: buffer: {6e 6f 75 69 64 33 32} (length 0x7)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              max_dir_size_kb: fs_opt["max_dir_size_kb", fmt[hex, int32]] {
  //                name: buffer: {6d 61 78 5f 64 69 72 5f 73 69 7a 65 5f 6b 62}
  //                (length 0xf) eq: const = 0x3d (1 bytes) val: int32 =
  //                0x4007b1 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              data_err_ignore: buffer: {64 61 74 61 5f 65 72 72 3d 69 67 6e
  //              6f 72 65} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              grpquota: buffer: {67 72 70 71 75 6f 74 61} (length 0x8)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              sysvgroups: buffer: {73 79 73 76 67 72 6f 75 70 73} (length
  //              0xa)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              user_xattr: buffer: {75 73 65 72 5f 78 61 74 74 72} (length
  //              0xa)
  //            }
  //            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 {
  //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
  //              63 6b} (length 0xe)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x567 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x567)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000040, "ext4\000", 5);
  memcpy((void*)0x200000000000, "./file1\000", 8);
  memcpy((void*)0x200000000200, "delalloc", 8);
  *(uint8_t*)0x200000000208 = 0x2c;
  memcpy((void*)0x200000000209, "data_err=abort", 14);
  *(uint8_t*)0x200000000217 = 0x2c;
  memcpy((void*)0x200000000218, "barrier", 7);
  *(uint8_t*)0x20000000021f = 0x3d;
  sprintf((char*)0x200000000220, "0x%016llx", (long long)2);
  *(uint8_t*)0x200000000232 = 0x2c;
  memcpy((void*)0x200000000233, "dioread_lock", 12);
  *(uint8_t*)0x20000000023f = 0x2c;
  memcpy((void*)0x200000000240, "nouid32", 7);
  *(uint8_t*)0x200000000247 = 0x2c;
  memcpy((void*)0x200000000248, "max_dir_size_kb", 15);
  *(uint8_t*)0x200000000257 = 0x3d;
  sprintf((char*)0x200000000258, "0x%016llx", (long long)0x4007b1);
  *(uint8_t*)0x20000000026a = 0x2c;
  memcpy((void*)0x20000000026b, "data_err=ignore", 15);
  *(uint8_t*)0x20000000027a = 0x2c;
  memcpy((void*)0x20000000027b, "grpquota", 8);
  *(uint8_t*)0x200000000283 = 0x2c;
  memcpy((void*)0x200000000284, "sysvgroups", 10);
  *(uint8_t*)0x20000000028e = 0x2c;
  memcpy((void*)0x20000000028f, "user_xattr", 10);
  *(uint8_t*)0x200000000299 = 0x2c;
  memcpy((void*)0x20000000029a, "bh", 2);
  *(uint8_t*)0x20000000029c = 0x2c;
  memcpy((void*)0x20000000029d, "dioread_nolock", 14);
  *(uint8_t*)0x2000000002ab = 0x2c;
  *(uint8_t*)0x2000000002ac = 0;
  memcpy(
      (void*)0x200000000b00,
      "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\x7f\xec\xa7\xae\x83"
      "\x31\x54\x44\x0a\x7b\x70\x32\x97\xae\xad\x3f\x26\xf8\x30\x1f\x45\x87\x03"
      "\x7d\x9f\xa1\xbd\x2b\xa3\xe9\x32\x9a\x74\xac\x75\xe0\xf6\xe0\x5e\x7c\x91"
      "\x21\x88\x38\x10\xdf\xf5\xdd\xc7\xe1\x3f\xe0\x5f\x31\xd0\xc1\x90\x51\xf4"
      "\xc1\x97\xca\x4d\x6f\xba\x74\x4d\xda\xb4\xcb\x9a\xce\x7c\x3e\x70\xc3\x39"
      "\xf7\x47\xce\x3d\xb9\xf7\x9c\x7c\x4f\x4e\x42\x02\xe8\x5b\xa3\xd9\x43\x21"
      "\xe2\xe5\x88\xf8\x26\x89\x38\x12\x11\x49\xbe\x6d\x30\xf2\x8d\xa3\xab\xfb"
      "\x2d\x3f\xba\x31\x95\x2d\x49\xac\xac\x7c\xfa\x57\x52\xdf\x2f\xcb\x37\x9e"
      "\xab\x71\xdc\xa1\x3c\xf3\x52\x44\xfc\xf6\x55\xc4\xa9\xc2\xc6\x72\xab\x8b"
      "\x4b\xb3\xa5\x72\x39\x9d\xcf\xf3\x63\xb5\xb9\xab\x63\xd5\xc5\xa5\xd3\x97"
      "\xe7\x4a\x33\xe9\x4c\x7a\x65\x62\x72\xf2\xec\xdb\x93\x13\xef\xbd\xfb\x4e"
      "\xd7\xea\xfa\xc6\x85\x7f\xbe\xff\xe4\xde\x87\x67\xbf\x3e\xb1\xfc\xdd\x2f"
      "\x0f\x8e\xde\x49\xe2\x5c\x1c\xce\xb7\x35\xd7\x63\x67\x86\xb3\x87\x9b\xcd"
      "\x6b\x46\x63\x34\x7f\x4d\x86\xe2\xdc\x13\x7b\x8f\x3f\x5d\x61\x7b\x4e\xd2"
      "\xeb\x13\x60\x47\x06\xf2\x76\x3e\x14\x59\x1f\x70\x24\x06\xf2\x56\x0f\xfc"
      "\xff\x7d\x19\x11\x2b\x40\x9f\x4a\xda\xb7\xff\x48\x76\xf5\x4c\x80\xdd\xd5"
      "\x88\x03\x1a\x63\xfb\xcd\xc7\xc1\x2f\xae\xa5\x9a\x8f\x7d\x9e\x3d\xfc\x60"
      "\x75\x00\xb4\xb1\xfe\x83\xab\x9f\x8d\xc4\xfe\xfa\xd8\xe8\xe0\x72\xb2\x6e"
      "\x64\x94\x8d\x77\x47\xba\x50\x7e\x56\xc6\xaf\x7f\xde\xbd\x93\x2d\xd1\x95"
      "\xcf\x21\x00\x3a\x73\xf3\x56\x44\x9c\x19\x1c\xdc\xd8\xff\x25\x79\xff\xb7"
      "\x73\x67\x5a\xaf\xde\xdf\x9c\x79\xb2\x0c\xfd\x1f\xec\x9e\x7b\x59\xfc\xf3"
      "\x66\xab\xf8\xa7\xb0\x16\xff\x44\x8b\xf8\xe7\x50\x8b\xb6\xbb\x13\x5b\xb7"
      "\xff\xc2\x83\x2e\x14\xd3\x56\x16\xff\xbd\xdf\x32\xfe\x5d\x9b\xb4\x1a\x19"
      "\xc8\x73\x2f\xd4\x63\xbe\xa1\xe4\xd2\xe5\x72\x7a\x26\x8f\x86\x4f\xc6\xd0"
      "\xbe\x2c\xbf\xd9\x7c\xce\xd9\xe5\xfb\x6d\x63\xe5\xe6\xf8\x2f\x5b\xb2\xf2"
      "\x1b\xb1\x60\x7e\x1e\x0f\x06\xf7\xad\x3f\x66\xba\x54\x2b\xd5\x3f\xb8\xeb"
      "\x82\x87\xb7\x22\x5e\x69\x19\xff\x26\x6b\xd7\x3f\x69\x71\xfd\xb3\xd7\xe3"
      "\x42\x87\x65\x1c\x4f\xef\xbe\xd6\x6e\xdb\xd6\xf5\x7f\xb6\x56\x7e\x8a\x78"
      "\xbd\xe5\xf5\x7f\x3c\xa3\x95\x6c\x3e\x3f\x39\x56\xbf\x1f\xc6\x1a\x77\xc5"
      "\x46\x7f\xdf\x3e\xfe\x7b\xbb\xf2\x7b\x5d\xff\xec\xfa\x1f\xdc\xbc\xfe\x23"
      "\x49\xf3\x7c\x6d\x75\xfb\x65\xfc\xb8\xff\xdf\xb4\xdd\xb6\x75\xf5\x8f\xce"
      "\xef\xff\xe1\xe4\xb3\x7a\x7a\x38\x5f\x77\xbd\x54\xab\xcd\x8f\x47\x0c\x27"
      "\x1f\x6f\x5c\x3f\xf1\xf8\xd8\x46\xbe\xb1\x7f\x56\xff\x93\x27\x36\xef\xff"
      "\x5a\xdd\xff\x07\x22\xe2\xf3\x0e\xeb\x7f\xfb\xd8\xcf\xaf\x76\x54\xff\x1e"
      "\x5d\xff\xe9\x6d\x5d\xff\xed\x27\xee\x7f\xf4\xc5\x0f\xed\xca\xef\xac\xff"
      "\x7b\xab\x9e\x3a\x99\xaf\xa9\xf7\x7f\x5b\xe8\xf4\x04\x9f\xe6\xb5\x03\x00"
      "\x00\x00\x00\x00\x80\xbd\xa6\x10\x11\x87\x23\x29\x14\xd7\xd2\x85\x42\xb1"
      "\xb8\xfa\xfd\x8e\x63\x71\xb0\x50\xae\x54\x6b\xa7\x2e\x55\x16\xae\x4c\x47"
      "\xfd\xb7\xb2\x23\x31\x54\x68\xcc\x74\x1f\x69\xfa\x3e\xc4\x78\xfe\x7d\xd8"
      "\x46\x7e\xe2\x89\xfc\x64\x44\x1c\x8d\x88\x6f\x07\x0e\xd4\xf3\xc5\xa9\x4a"
      "\x79\xba\xd7\x95\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x80\x3d\xe2\x50\x9b\xdf\xff\x67\xfe\x18\xe8\xf5\xd9\x01\xcf\x9c\xbf"
      "\xfc\x86\xfe\xb5\x65\xfb\xef\xc6\x3f\x3d\x01\x7b\x92\xf7\x7f\xe8\x5f\xda"
      "\x3f\xf4\x2f\xed\x1f\xfa\x97\xf6\x0f\xfd\x4b\xfb\x87\xfe\xb5\xae\xfd\x9b"
      "\xf4\x87\xbe\xe2\xfd\x1f\xfa\x97\xf6\x0f\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x5d\x75\xe1\xfc\xf9"
      "\x6c\x59\x59\x7e\x74\x63\x2a\xcb\x4f\x5f\x5b\x5c\x98\xad\x5c\x3b\x3d\x9d"
      "\x56\x67\x8b\x73\x0b\x53\xc5\xa9\xca\xfc\xd5\xe2\x4c\xa5\x32\x53\x4e\x8b"
      "\x53\x95\xb9\xad\x9e\xaf\x5c\xa9\x5c\x1d\x9f\x88\x85\xeb\x63\xb5\xb4\x5a"
      "\x1b\xab\x2e\x2e\x5d\x9c\xab\x2c\x5c\xa9\x5d\xbc\x3c\x57\x9a\x49\x2f\xa6"
      "\x43\xbb\x52\x2b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x78\xbe\x54\x17\x97\x66\x4b\xe5\x72\x3a\x2f\x21\xb1\xa3\xc4\xe0\xde"
      "\x38\x0d\x89\x2e\x27\x7a\xdd\x33\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\xc0\x63\xff\x05\x00\x00\xff\xff\xe8\x69\x3a\x4e",
      1383);
  syz_mount_image(
      /*fs=*/0x200000000040, /*dir=*/0x200000000000,
      /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_NOSUID|MS_NODEV|MS_MANDLOCK*/
      0x3000046, /*opts=*/0x200000000200, /*chdir=*/1, /*size=*/0x567,
      /*img=*/0x200000000b00);
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: open_flags = 0x109042 (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000000, "./file1\000", 8);
  res = syscall(__NR_open, /*file=*/0x200000000000ul,
                /*flags=O_SYNC|O_LARGEFILE|O_CREAT|O_RDWR*/ 0x109042ul,
                /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  //  fallocate arguments: [
  //    fd: fd (resource)
  //    mode: fallocate_mode = 0x20 (8 bytes)
  //    off: intptr = 0x0 (8 bytes)
  //    len: intptr = 0x7000000 (8 bytes)
  //  ]
  syscall(__NR_fallocate, /*fd=*/r[0], /*mode=FALLOC_FL_INSERT_RANGE*/ 0x20ul,
          /*off=*/0ul, /*len=*/0x7000000ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: open_flags = 0x42 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000040, "./file1\000", 8);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000040ul,
                /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  pwrite64 arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {61} (length 0x1)
  //    }
  //    count: len = 0x200000c1 (8 bytes)
  //    pos: intptr = 0x9000 (8 bytes)
  //  ]
  memset((void*)0x2000000000c0, 97, 1);
  syscall(__NR_pwrite64, /*fd=*/r[1], /*buf=*/0x2000000000c0ul,
          /*count=*/0x200000c1ul, /*pos=*/0x9000ul);
  //  setxattr$trusted_overlay_upper arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    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 = 0x841 (8 bytes)
  //    flags: setxattr_flags = 0x0 (8 bytes)
  //  ]
  memcpy((void*)0x200000000000, "./file1\000", 8);
  memcpy((void*)0x2000000001c0, "trusted.overlay.upper\000", 22);
  syscall(__NR_setxattr, /*path=*/0x200000000000ul, /*name=*/0x2000000001c0ul,
          /*val=*/0x200000000200ul, /*size=*/0x841ul, /*flags=*/0ul);
}
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;
  loop();
  return 0;
}