// https://syzkaller.appspot.com/bug?id=04e95388a1b71c0e15b667b54b34ad3a60a9d933
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.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/futex.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 thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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");
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 2; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

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;
    }
  }
}

void execute_call(int call)
{
  switch (call) {
  case 0:
    //  syz_mount_image$hfs arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {68 66 73 00} (length 0x4)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x30008c0 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {66 69 6c 65 5f 75 6d 61 73 6b 3d 30 30 30 30
    //          30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 37 37 37 37 2c 64
    //          69 72 5f 75 6d 61 73 6b 3d 30 30 30 30 30 30 30 30 30 30 30 30
    //          30 30 30 30 30 30 30 30 30 30 30 2c 69 6f 63 68 61 72 73 65 74
    //          3d 69 73 6f 38 38 35 39 2d 36 2c 63 6f 64 65 70 61 67 65 3d 63
    //          70 38 35 35 2c 63 72 65 61 74 6f 72 3d 4d dd 71 75 2c 00 ee ab
    //          c7 2a 98 32 43 69 50 c6 11 64 98 dd a8 be 60 a9 47 46 ea 68 76
    //          6f 63 d1 d6 39 44 fb da 2a 93 37 43 9b 37 b6 f2 a6 94 ba 98 f4
    //          00 70 d0 9c 38 90 bd 28 a2 01 8f 1a df e1 e0 a6 30 02 0a 9c ac
    //          1a 43 80 0a 70 a9 32 8d db 2a 2f 2e 20 7d a7 cd 3c af 24 3b 39
    //          ea ff 49 66 b7 aa 97 cb 6c c7 d2 cf c5 9e 7a 97 6d e0 a0 0d 23
    //          c7 ff aa a0 56 cc 4f 8b c7 b4 c0 f9 a2 1d b6 42 b3 e8 32 e3 0a
    //          90 ba 1b 9e 79 33 b7 7c 60 f6 a1 b9 ca 91 28 f0 a2 d0 e2 33 73
    //          c9 d1 5c 79 86 5b ae 97 dd d8 2b 98 00 1b 6a a9 c5 39 0e 4d ea
    //          f5 f0 ee 49 2c 68 42 b1 c0 84 86 e4 79 a8 89 49 14 59 a2 57 e9
    //          d4 08 36 34 da c6 cd 58 52 0f 72 e6 c2 f1 1b bd 5b 03 65 5b b1
    //          86 3b 16 f3} (length 0x14e)
    //        }
    //        union ANYUNION {
    //          ANYBLOB: buffer: {11 f4 57 9b e0 1e 43 5c 58 4a 33 c6 3f 81 73
    //          f9 6b c4 54 60 35 80 4d 47 be 19 16 3b d9 e5 89 bf dd 0a 9e 68
    //          04 49 5a 4e 4d 83 80 4e 78 ac 5a 72 44 62 95 af d7 9d e3 fd 6a
    //          02 93 2a 26 ab 40 45 13 3c 37 1e 56 b0 d4 85 44 db 3c 7d b2 3a
    //          43 2f 83 7b 93 f8 9b 6f 22 3c d1 f6 73 1d 40 7f fd b1 dd 94 67
    //          f5 cd 2d 6c 4e 8b 9d 4f 50 d3 38 ac 91 50 1a 4b b7 80 c4 72 39
    //          29 e2 2f 55 25 45 46 fa cc 4f 02 84 e6 44 e6} (length 0x87)
    //        }
    //        union ANYUNION {
    //          ANYRES8: ANYRES8 (resource)
    //        }
    //        union ANYUNION {
    //          ANYRESHEX: ANYRES64 (resource)
    //        }
    //      }
    //    }
    //    chdir: int8 = 0x11 (1 bytes)
    //    size: len = 0x314 (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x314)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x2000000007c0, "hfs\000", 4);
    memcpy((void*)0x200000000000, "./file1\000", 8);
    memcpy(
        (void*)0x200000000980,
        "\x66\x69\x6c\x65\x5f\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30"
        "\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x37\x37\x37\x37"
        "\x2c\x64\x69\x72\x5f\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30"
        "\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30"
        "\x2c\x69\x6f\x63\x68\x61\x72\x73\x65\x74\x3d\x69\x73\x6f\x38\x38\x35"
        "\x39\x2d\x36\x2c\x63\x6f\x64\x65\x70\x61\x67\x65\x3d\x63\x70\x38\x35"
        "\x35\x2c\x63\x72\x65\x61\x74\x6f\x72\x3d\x4d\xdd\x71\x75\x2c\x00\xee"
        "\xab\xc7\x2a\x98\x32\x43\x69\x50\xc6\x11\x64\x98\xdd\xa8\xbe\x60\xa9"
        "\x47\x46\xea\x68\x76\x6f\x63\xd1\xd6\x39\x44\xfb\xda\x2a\x93\x37\x43"
        "\x9b\x37\xb6\xf2\xa6\x94\xba\x98\xf4\x00\x70\xd0\x9c\x38\x90\xbd\x28"
        "\xa2\x01\x8f\x1a\xdf\xe1\xe0\xa6\x30\x02\x0a\x9c\xac\x1a\x43\x80\x0a"
        "\x70\xa9\x32\x8d\xdb\x2a\x2f\x2e\x20\x7d\xa7\xcd\x3c\xaf\x24\x3b\x39"
        "\xea\xff\x49\x66\xb7\xaa\x97\xcb\x6c\xc7\xd2\xcf\xc5\x9e\x7a\x97\x6d"
        "\xe0\xa0\x0d\x23\xc7\xff\xaa\xa0\x56\xcc\x4f\x8b\xc7\xb4\xc0\xf9\xa2"
        "\x1d\xb6\x42\xb3\xe8\x32\xe3\x0a\x90\xba\x1b\x9e\x79\x33\xb7\x7c\x60"
        "\xf6\xa1\xb9\xca\x91\x28\xf0\xa2\xd0\xe2\x33\x73\xc9\xd1\x5c\x79\x86"
        "\x5b\xae\x97\xdd\xd8\x2b\x98\x00\x1b\x6a\xa9\xc5\x39\x0e\x4d\xea\xf5"
        "\xf0\xee\x49\x2c\x68\x42\xb1\xc0\x84\x86\xe4\x79\xa8\x89\x49\x14\x59"
        "\xa2\x57\xe9\xd4\x08\x36\x34\xda\xc6\xcd\x58\x52\x0f\x72\xe6\xc2\xf1"
        "\x1b\xbd\x5b\x03\x65\x5b\xb1\x86\x3b\x16\xf3",
        334);
    memcpy(
        (void*)0x200000000ace,
        "\x11\xf4\x57\x9b\xe0\x1e\x43\x5c\x58\x4a\x33\xc6\x3f\x81\x73\xf9\x6b"
        "\xc4\x54\x60\x35\x80\x4d\x47\xbe\x19\x16\x3b\xd9\xe5\x89\xbf\xdd\x0a"
        "\x9e\x68\x04\x49\x5a\x4e\x4d\x83\x80\x4e\x78\xac\x5a\x72\x44\x62\x95"
        "\xaf\xd7\x9d\xe3\xfd\x6a\x02\x93\x2a\x26\xab\x40\x45\x13\x3c\x37\x1e"
        "\x56\xb0\xd4\x85\x44\xdb\x3c\x7d\xb2\x3a\x43\x2f\x83\x7b\x93\xf8\x9b"
        "\x6f\x22\x3c\xd1\xf6\x73\x1d\x40\x7f\xfd\xb1\xdd\x94\x67\xf5\xcd\x2d"
        "\x6c\x4e\x8b\x9d\x4f\x50\xd3\x38\xac\x91\x50\x1a\x4b\xb7\x80\xc4\x72"
        "\x39\x29\xe2\x2f\x55\x25\x45\x46\xfa\xcc\x4f\x02\x84\xe6\x44\xe6",
        135);
    *(uint8_t*)0x200000000b55 = -1;
    sprintf((char*)0x200000000b56, "0x%016llx", (long long)0);
    memcpy(
        (void*)0x200000000b80,
        "\x78\x9c\xec\xdd\x4d\x6b\x13\x4f\x1c\x07\xf0\xef\xec\xa6\x4d\xfa\x6f"
        "\xe9\x7f\xb5\x15\xc1\x83\x48\x35\x60\x2f\xa2\xf5\x22\x5e\x22\x25\x2f"
        "\xc2\x93\xa8\x4d\x0a\xc5\x25\xa2\xb6\xf8\x80\x60\x15\x4f\x22\xf6\xee"
        "\xdd\xa3\x57\x5f\x83\x78\x51\x04\xcf\xf5\xe4\x49\x3c\x78\xaa\x07\x19"
        "\x99\x87\x64\x9f\x37\xa9\x66\x77\x53\xfd\x7e\xc0\xb2\xd9\xd9\x99\xfd"
        "\xed\xce\xce\x53\xc0\x2c\x88\xe8\x9f\xb5\xda\xde\x7d\x75\xfe\x8b\xfa"
        "\x27\x00\x17\x2e\xf0\xec\x22\xe0\x00\x68\x00\x35\x00\x47\x70\xb4\xb1"
        "\xd5\xdb\xdc\xd8\xf4\xbb\x9d\xbc\x82\x5c\x1c\xaf\x9b\x5c\x02\x26\xa7"
        "\x48\x1c\xb3\xd6\xeb\xa6\x65\x6d\xc0\xe6\xb0\x3c\xf5\xa9\x86\xb9\xf0"
        "\x3e\x2a\x86\x94\xf2\xd2\xe7\xaa\x83\xa0\xca\xe9\xd6\x2f\xdd\xe8\xce"
        "\x13\xba\x27\xa8\xdb\xd6\xa9\x13\x1b\x15\xc5\x97\xe5\xf1\xfe\xb3\x7c"
        "\x9b\x01\xb0\x5d\x44\x30\x13\x25\xbf\xa6\xc4\x1e\xf6\x70\x0f\xf3\xa5"
        "\x85\x43\x44\x44\x13\x49\x98\xf1\xdd\xb1\xe3\xfc\x9c\x9d\xbf\x3b\x0e"
        "\xd0\xb4\x83\x89\x4a\x9b\xb8\xf1\xff\x77\xed\x55\x1d\x40\xe1\x64\x6e"
        "\x6a\x68\xfc\xd7\xab\x2c\x29\x54\xbd\xff\xaf\x93\x82\xf5\x9e\x5e\xc2"
        "\xa9\x74\xa7\xbf\x4a\x4c\x2b\xeb\x75\xec\xf3\x54\xec\xf3\x34\xcc\xd3"
        "\x13\x99\x5d\x8a\x61\xab\x4a\x1d\x8b\x33\xb3\xbe\xe1\x77\xcf\xac\xdd"
        "\xf4\x3b\x0e\x9e\xa0\x65\x85\x0e\x5b\xd4\x7f\x3b\xf6\xf1\xb4\x22\xd1"
        "\xd6\x13\x45\x2f\xa5\xac\x4d\x73\x0c\x4a\x9b\xc9\x3c\x44\xa4\xcf\x28"
        "\x67\xf5\x35\x4c\xa9\x6b\x58\x31\xf1\xdf\x05\x10\x89\x7f\x21\xf7\x8c"
        "\x05\x10\xef\xc4\x07\x71\x45\x78\x78\x89\xce\x60\xfe\x57\x93\x42\x55"
        "\x93\xae\x29\x2f\x56\x53\x26\xfe\xb3\xd9\x25\xea\xab\xf4\xd4\x51\xb0"
        "\xdd\x46\xab\xd5\x72\x22\x87\x1c\xd2\x27\x39\x66\xcf\x60\x0d\xb9\xca"
        "\x06\xdc\xac\x33\x4e\xdb\x32\x23\x5f\x10\x78\xc3\xe2\xd4\xb9\x0e\xc7"
        "\x72\x99\xab\x3b\x37\x24\xd7\x42\x6a\xae\x15\xbd\xbd\x0c\x27\x23\xd7"
        "\x62\x24\x97\xba\x9a\xf5\x0d\xff\x6d\xf6\xa9\x4a\x21\x5e\x88\xcb\x62"
        "\x09\x5f\xf1\x06\xed\xd0\xfc\xdf\x51\xf1\x35\x91\x6c\x99\xa1\x87\x3e"
        "\x68\x35\xa2\x69\x86\x02\x7d\xc7\x55\xeb\x8c\xd6\x6c\x48\xad\x69\x7b"
        "\x22\x3d\x72\x6c\x7d\xda\x7d\x68\xf6\x27\x9b\xcb\xe0\x2e\x26\x1b\xac"
        "\xf5\x23\xbf\x4f\xa3\x7d\x78\x8e\xeb\xb8\x80\xf9\x3b\xf7\x1f\xdc\x70"
        "\x7d\xbf\x7b\x5b\x6d\x5c\xf3\xd5\xe3\xaa\x37\x06\x7b\x6e\xcd\xd9\x0d"
        "\xbf\x3b\xf5\x14\x08\x27\x4d\xca\x06\xb6\x83\x3d\x75\x48\x2d\x71\x70"
        "\x7f\x50\x2a\x33\xb0\xe5\xb1\x16\xa8\xfa\x8f\x94\x24\xd5\xb0\x7a\xdf"
        "\xfb\x7b\x54\x2b\x1b\x56\xe0\xa3\x3f\x8d\x47\xf5\x03\x85\xde\xba\xd9"
        "\x11\xae\x62\x7f\x1b\xfd\xae\x6b\x3c\x05\xb6\xdf\x8f\xe7\x41\xea\x4f"
        "\x1b\x22\x49\x3f\xa5\x94\x25\x36\xa2\x1d\x7b\x67\xe2\x49\xd5\x74\x4b"
        "\x54\xae\xa0\xd2\x47\x3b\x3e\x65\xaa\x43\x07\x9b\xaa\x52\x61\xd6\x7f"
        "\xc1\x7a\xa5\x66\x26\x7b\xea\x8f\x97\x3a\x4f\x1f\xf1\x8b\x00\x5b\xa2"
        "\x54\x73\xec\xc1\x0a\x2e\xc8\x2b\xcd\x8c\x1c\xc0\x7f\x39\x2b\xb8\xb4"
        "\x62\x33\x57\x70\xc9\x35\x57\x62\xcd\xa8\xd7\x5c\x27\x4f\x03\xa7\x46"
        "\x3f\xa3\x67\xe3\xfc\x4b\x88\x36\x3e\xe2\x2a\xbf\xff\x27\x22\x22\x22"
        "\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x22\x3a"
        "\x68\xca\xf8\xcf\x30\x55\x5f\x23\x11\x11\x11\x11\x11\x11\x11\x11\x11"
        "\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\xd1\x41\xb7\xda"
        "\x80\xf9\xdd\x6b\xf4\xdf\xff\x8b\xd1\xde\xff\x1b\x7f\x15\x8b\x6b\x7e"
        "\x12\x7c\x2c\xef\xff\xdd\xe9\x81\xef\xff\x25\x2a\xde\xaf\x00\x00\x00"
        "\xff\xff\xf0\x7f\x73\xc7",
        788);
    syz_mount_image(
        /*fs=*/0x2000000007c0, /*dir=*/0x200000000000,
        /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_NODIRATIME|MS_MANDLOCK|MS_DIRSYNC*/
        0x30008c0, /*opts=*/0x200000000980, /*chdir=*/0x11, /*size=*/0x314,
        /*img=*/0x200000000b80);
    break;
  case 1:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: open_flags = 0x4040 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000280, "./bus\000", 6);
    syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000280ul,
            /*flags=O_DIRECT|O_CREAT*/ 0x4040, /*mode=*/0);
    break;
  }
}
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;
  loop();
  return 0;
}