// https://syzkaller.appspot.com/bug?id=46dad9184d8294a90c841b553a5dfc0f86aab2a4
// 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");
  }
  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 < 10; 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) +
                                     (call == 2 ? 4000 : 0) +
                                     (call == 5 ? 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;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    memcpy((void*)0x20000140, "vfat\000", 5);
    memcpy((void*)0x20000040, "./file0\000", 8);
    memcpy(
        (void*)0x20000180,
        "\x78\x9c\xec\xdd\xcf\x6b\x23\x65\x18\xc0\xf1\x27\x69\x36\xbf\x96\x6d"
        "\x72\x10\x45\x41\xfa\xa0\x17\xbd\x0c\x6d\xf4\xac\x06\xd9\x05\x31\xe0"
        "\xd2\xdd\x88\xbb\x82\x30\xbb\x9d\x68\xc8\x98\x94\x99\x50\x89\x88\xad"
        "\x27\xaf\xe2\xcd\x7f\x40\x70\xd9\x63\x6f\x05\xf5\x1f\xe8\xc5\x5b\xbd"
        "\x78\xf1\xd6\x4b\x41\xd0\x22\xe2\xc8\x4c\x66\xda\xfc\x98\x24\x4d\x9a"
        "\x92\xd6\x7e\x3f\x50\xf2\x4c\xde\xf7\x99\x99\x37\x33\x84\xe7\x0d\xcc"
        "\xdb\xc3\x0f\xbe\xf9\xb4\x51\x73\x8d\x9a\xd9\x96\x64\x56\x25\x21\x22"
        "\x72\x2c\x52\x94\xa4\x44\x12\xe1\x6b\x32\x88\xd3\xd2\x6b\x47\x5e\xbd"
        "\xf9\xc7\xc1\x8b\xf7\x1e\x3c\x7c\xb7\x5c\xa9\xdc\x5e\x57\xbd\x53\xbe"
        "\xff\x5a\x49\x55\x97\x57\x7e\xfc\xec\x8b\x5c\xd8\x6d\x2f\x23\xfb\xc5"
        "\x8f\x0e\x8f\x4a\xbf\xef\x3f\xbb\xff\xfc\xe1\xbf\xf7\x3f\xa9\xbb\x5a"
        "\x77\xb5\xd9\x6a\xab\xa9\x8f\x5a\xbf\xb5\xcd\x47\xb6\xa5\x1b\x75\xb7"
        "\x61\xa8\xde\xb5\x2d\xd3\xb5\xb4\xde\x74\x2d\xa7\xdb\xde\xea\xb6\xd7"
        "\xec\xd6\xe6\x66\x47\xcd\xe6\xc6\xad\xfc\xa6\x63\xb9\xae\x9a\xcd\x8e"
        "\x36\xac\x8e\xb6\x5b\xda\x76\x3a\x6a\x7e\x6c\xd6\x9b\x6a\x18\x86\xde"
        "\xca\xcb\xf5\x92\x1d\xd8\xf6\x12\x93\x73\xaa\x4f\xd6\xd7\xcd\xf2\x8c"
        "\x07\x7c\x3c\x63\x1e\xe6\xed\x6f\xcf\xf3\xc6\x34\x3b\x4e\xd9\x5c\x12"
        "\x31\x72\x43\x2d\xd5\x27\x17\x7a\x5e\x00\x00\xe0\x52\x1a\xa8\xff\xbf"
        "\x8b\x6a\x84\xa2\x24\x4f\x0a\xca\x44\xdf\x5c\x60\xb8\xfe\x8f\xe2\xa0"
        "\xfe\xf7\xab\xce\xd3\xfa\xff\xe9\x4b\x3f\xb7\x6f\xbe\xbf\xbb\x1c\xd6"
        "\xff\x7b\xe9\xb8\xfa\xff\xf5\x5f\xbb\xf9\x7d\xf5\xbf\x7f\xf4\xb9\xd7"
        "\xff\x3f\x0c\x6c\x0f\x57\x44\x57\xde\xf6\x34\x9d\xcf\x55\xff\xe3\x72"
        "\x58\x49\x0f\xbd\xd5\x3f\xf5\xf3\xeb\xff\x7c\x38\x7f\x0f\x7c\xf5\xe1"
        "\xd3\xd5\x20\xa0\xfe\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\xe0\x2a\x38\xf6\xbc\x82\xe7\x79\x85\xe8\x35\xfa"
        "\x3b\x7d\x84\x20\xdc\x8e\xb6\xc6\x3d\x68\x8c\x2b\x67\xd4\xf5\xcf\x84"
        "\x2b\x0a\x9c\xdc\x0f\xf8\x5f\xba\xf7\xe0\xa1\x64\x83\x07\xf7\x52\xcb"
        "\x22\xf6\xd7\x5b\xd5\xad\x6a\xf7\x35\x6c\x8f\x3a\xae\x4a\x41\xfe\x09"
        "\xee\x87\x50\x77\xc1\x89\x9d\xa0\x51\x7d\x45\xf9\xc9\xde\x0e\xf3\xb7"
        "\xb7\xaa\x4b\x41\x4b\x59\x44\xc5\x16\x4b\xd6\xa4\x20\xc5\xbe\xfc\x20"
        "\xbe\xf3\x4e\xe5\xf6\x9a\x76\xf5\xe7\x27\x52\x79\x3f\xbf\x26\xf5\x20"
        "\xbf\x24\x05\x79\x26\x3e\xbf\x14\x9b\x9f\x96\x57\x5e\xee\xc9\x37\xa4"
        "\x20\xbf\x3c\x96\x96\xd8\xb2\x11\x7e\x8f\x45\xf9\x5f\xae\xa9\xbe\xfd"
        "\x5e\x65\x20\x3f\x17\xf4\x8b\xf3\xe6\xc5\x5f\x16\x00\x00\x00\x00\x00"
        "\xe6\xca\x50\xcd\x86\xd3\xe7\xd8\xf9\xbb\x61\xa8\xc6\xb5\xfb\x73\x79"
        "\xe9\x9d\x9f\x0f\xff\x3e\x70\x32\xbf\x5e\x8d\x9d\x9f\xa7\x0a\x2f\xa4"
        "\x16\x3b\x76\x00\x00\x00\x00\x00\xae\x0b\x37\xfd\x79\xc3\xb4\x6d\xcb"
        "\x71\x3b\x23\x83\x9c\x4c\xea\x93\x09\xf7\x36\x7e\x3f\xf1\x41\x6a\x9a"
        "\xce\x7e\x70\x10\x04\x37\xc6\xf5\x59\xea\x19\xe1\x59\xf7\x9c\x0e\xff"
        "\x83\xc6\x14\x27\x2f\xd3\x8d\xd4\xb4\xed\x3f\x33\x12\xfb\x61\x46\x4b"
        "\xb8\xf6\x35\x65\xcf\xf1\xa9\x9a\x76\x34\xfe\x33\x74\xce\x4e\x7b\x09"
        "\x1c\x37\x39\xfd\xd8\x2d\xc7\x5d\xf1\xcf\x47\x67\x1a\x4e\x4f\x10\xfd"
        "\x6c\x34\xaa\x8f\xdc\x9d\x75\xcf\xa3\x82\x68\xe5\xdc\x49\x9d\x9f\xfb"
        "\xf6\xfb\xbf\x66\x3b\x44\x22\x5c\xb5\xb7\xb7\xe9\x8d\xdd\xec\x84\x91"
        "\x06\x41\x62\xe0\x9d\x9d\x09\x37\xed\x91\xe7\x4d\x3c\x9f\x1b\x17\xf9"
        "\x9d\x03\x00\x00\x00\x60\x31\xa2\xa2\x3f\xe7\x46\xef\xbc\xb5\xd8\x13"
        "\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\xe0\x1a\x9a\xeb\x32\x69\x23\x82\x45\x8f\x11"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb8\x2c\xfe\x0b\x00\x00\xff"
        "\xff\xbd\x9b\xf9\x62",
        855);
    syz_mount_image(/*fs=*/0x20000140, /*dir=*/0x20000040,
                    /*flags=MS_NOATIME*/ 0x400, /*opts=*/0x20000000,
                    /*chdir=*/1, /*size=*/0x357, /*img=*/0x20000180);
    break;
  case 1:
    memcpy((void*)0x20000380, "./file0\000", 8);
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000380ul,
                  /*flags=O_TRUNC|O_NOFOLLOW|O_CREAT|O_RDWR*/ 0x20242,
                  /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    memcpy((void*)0x20000f40, "msdos\000", 6);
    memcpy((void*)0x20000140, ".\000", 2);
    syz_mount_image(
        /*fs=*/0x20000f40, /*dir=*/0x20000140,
        /*flags=MS_I_VERSION|MS_PRIVATE|MS_SYNCHRONOUS|MS_STRICTATIME|MS_SILENT|MS_REMOUNT|0x202408*/
        0x1a4a438, /*opts=*/0x200008c0, /*chdir=*/0xb, /*size=*/0,
        /*img=*/0x20000000);
    break;
  case 3:
    *(uint16_t*)0x20000140 = 0;
    *(uint16_t*)0x20000142 = 0;
    *(uint64_t*)0x20000148 = 0x100000;
    *(uint64_t*)0x20000150 = 5;
    *(uint32_t*)0x20000158 = 0;
    *(uint32_t*)0x2000015c = 0;
    memset((void*)0x20000160, 0, 16);
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x40305828, /*arg=*/0x20000140ul);
    break;
  case 4:
    memcpy((void*)0x20000000, "./bus\000", 6);
    syscall(__NR_open, /*file=*/0x20000000ul,
            /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_CREAT|O_RDWR*/ 0x60142ul,
            /*mode=*/0ul);
    break;
  case 5:
    memcpy((void*)0x20003880, "vfat\000", 5);
    memcpy((void*)0x20000000, "./file0\000", 8);
    memcpy((void*)0x200000c0,
           "iocharset=iso8859-%,utf8=1,shortname=lower,uni_xlate=1,shortname="
           "win95,iocharset=cp775,uni_xlate=1,rodir,utf8=1,uni_xlate=0,tz=UTC,"
           "rodir,uni_xlate=0,utf8=0,codepage=1255,nonumtail=0,\000",
           183);
    memcpy(
        (void*)0x20002300,
        "\x78\x9c\xec\xdd\x3f\x6b\x23\x47\x14\x00\xf0\xb7\xb2\x2c\x29\x49\x21"
        "\x15\xa9\x42\x20\x0b\x49\x91\xca\xd8\x6e\xd3\xc8\x04\x1b\x4c\x54\x25"
        "\xa8\x48\x52\x24\x26\xb6\x21\x58\x22\x60\x83\x21\x7f\x88\xe2\x2a\x6d"
        "\x9a\x94\xf9\x04\x81\x40\xba\xfb\x12\xd7\xdc\x37\x38\xb8\xf6\xe0\xba"
        "\x73\x61\xd8\x63\xa5\xdd\x93\xec\x93\x65\xeb\xb0\xec\xfb\xf3\xfb\x35"
        "\x1e\xcf\xce\x9b\x79\x33\x1e\x6c\x5c\xec\xd3\xf7\x1f\xf6\x0f\x76\xd3"
        "\xd8\x3f\xf9\xed\x61\x34\x1a\x49\x54\xda\xd1\x8e\xd3\x24\x5a\x51\x89"
        "\xd2\x1f\x71\x4e\xfb\xaf\x00\x00\x5e\x67\xa7\x59\x16\x4f\xb2\x91\x79"
        "\xe2\x92\x88\x68\x2c\x2e\x2d\x00\x60\x81\xe6\xfe\xfb\xff\xff\xc2\x53"
        "\x02\x00\x16\xec\xab\xaf\xbf\xf9\x62\xa3\xd3\xd9\xfc\x32\x4d\x1b\xb1"
        "\xd5\xff\xf3\xb8\x9b\xff\x67\x9f\x7f\x1d\x3d\xdf\xd8\x8f\x1f\xa3\x17"
        "\x7b\xb1\x1a\xcd\x38\x8b\xc8\x9e\x1b\xb5\xb7\xb2\x2c\x1b\x54\xd3\x5c"
        "\x2b\x3e\xe9\x0f\x8e\xbb\x79\x64\xff\xbb\xfb\xc5\xfc\x1b\x8f\x23\x86"
        "\xf1\x6b\xd1\x8c\xd6\xb0\xeb\x7c\xfc\x76\x67\x73\x2d\x1d\x99\x88\x1f"
        "\xe4\x79\xbc\x5b\xac\xdf\xce\xe3\xd7\xa3\x19\xef\x4f\x59\x7f\xbb\xb3"
        "\xb9\x3e\x25\x3e\xba\xb5\xf8\xf4\xe3\x89\xfc\x57\xa2\x19\x0f\x7e\x88"
        "\x9f\xa2\x17\xbb\xc3\x24\xc6\xf1\xbf\xaf\xa5\xe9\xe7\xd9\xdf\x4f\x7f"
        "\xfd\x36\x4f\x2f\x8f\x4f\x06\xc7\xdd\xfa\x70\xdc\x58\xb6\x74\xcb\x3f"
        "\x1a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\xde\x60\x2b\x45\xed\x9c\x7a\x0c\xeb\xf7\xe4\x5d\x45\xfd\x9d\xa5"
        "\xb3\xfc\x9b\xe5\x48\x4b\xad\xf3\xf5\x79\x46\xf1\x49\x39\xd1\x85\xfa"
        "\x40\x83\x2c\xfe\x29\xeb\xeb\xac\xa6\x69\x9a\x15\x03\xc7\xf1\xd5\xf8"
        "\xa0\x1a\xd5\xbb\xd9\x35\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\xbc\x5a\x8e\x7e\xfe\xe5\x60\xa7\xd7\xdb\x3b\xbc\x91"
        "\x46\x59\x0d\xa0\x7c\xad\xff\x65\xe7\x69\x4f\xf4\x7c\x14\xb3\x07\xd7"
        "\xc7\x6b\x55\x8a\xe6\x8c\x99\x63\xa9\x1c\x93\x44\xcc\x4c\x23\xdf\xc4"
        "\x0d\x1d\xcb\x55\x8d\x77\x2e\xcb\xf9\xdf\xff\xe6\x9d\xb0\x71\xf5\x98"
        "\xe5\x59\xe7\x73\x33\x8d\xf2\x76\x1d\xec\x24\xd3\xcf\xb0\x1e\x65\x4f"
        "\xa3\xbc\x24\xf7\x26\xc7\xd4\xe2\x9a\x6b\xd5\x2e\x7b\x94\xcd\x75\xfd"
        "\x6a\x53\x1f\x35\xe7\xde\x7b\xed\xbd\x61\x63\x30\x63\x4c\x24\xb3\x12"
        "\xfb\xec\xd1\xe8\xe4\x8a\x9e\xe4\xe2\x2e\x6a\xc3\x53\x9d\x1a\xbe\x5c"
        "\x34\x26\xc2\x2f\xdc\x8d\xb9\xee\xf3\x8b\xbf\x2b\x12\xd5\x3a\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x60\xa1\xc6\x2f\xfd"
        "\x4e\x79\x78\x32\x33\xb4\x92\xd5\x17\x96\x16\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\xdc\xaa\xf1\xe7\xff\xcf\xd1\x18\x14"
        "\xc1\xd7\x18\x5c\x8b\xc3\xa3\x3b\xde\x22\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x6f\x81"
        "\x67\x01\x00\x00\xff\xff\xc3\x51\x62\x02",
        673);
    syz_mount_image(
        /*fs=*/0x20003880, /*dir=*/0x20000000,
        /*flags=MS_POSIXACL|MS_REC|MS_SYNCHRONOUS|MS_NOSUID|MS_NODIRATIME*/
        0x14812, /*opts=*/0x200000c0, /*chdir=*/0x25, /*size=*/0x2a1,
        /*img=*/0x20002300);
    break;
  case 6:
    memcpy((void*)0x20000380, "/dev/loop", 9);
    *(uint8_t*)0x20000389 = 0x30 + procid * 1;
    *(uint8_t*)0x2000038a = 0;
    memcpy((void*)0x20000340, "./bus\000", 6);
    syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000340ul,
            /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
    break;
  case 7:
    memcpy((void*)0x200005c0, "./bus\000", 6);
    res =
        syscall(__NR_open, /*file=*/0x200005c0ul, /*flags=*/0ul, /*mode=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 8:
    *(uint32_t*)0x20000140 = 0;
    syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4c02, /*arg=*/0x20000140ul);
    break;
  case 9:
    memcpy((void*)0x20000000, "./file2\000", 8);
    memcpy((void*)0x20000040, "./file1\000", 8);
    syscall(__NR_rename, /*old=*/0x20000000ul, /*new=*/0x20000040ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}