// https://syzkaller.appspot.com/bug?id=4aacada57d78ea148cd4ca4a2f60d5bea15ba697
// 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
#ifndef __NR_renameat2
#define __NR_renameat2 316
#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 < 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));
      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:
    //  syz_mount_image$vfat arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {76 66 61 74 00} (length 0x5)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x414 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {6e 6f 6e 75 6d 74 61 69 6c 2c 6e 66 73 2c 73
    //          68 6f 72 74 6e 61 6d 65 3d 6c 6f 77 65 72 2c 75 74 66 38 3d 31
    //          2c 64 65 62 75 67 2c 69 6f 63 68 61 72 73 65 74 3d 75 74 66 38
    //          2c 73 68 6f 72 74 6e 61 6d 65 3d 6d 69 78 65 64 2c 75 74 66 38
    //          3d 31 2c 00 48 45 16 00 00 00 00 00} (length 0x5a)
    //        }
    //      }
    //    }
    //    chdir: int8 = 0x1 (1 bytes)
    //    size: len = 0x2bb (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x2bb)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000400, "vfat\000", 5);
    memcpy((void*)0x200000000280, "./file0\000", 8);
    memcpy((void*)0x200000000000,
           "\x6e\x6f\x6e\x75\x6d\x74\x61\x69\x6c\x2c\x6e\x66\x73\x2c\x73\x68"
           "\x6f\x72\x74\x6e\x61\x6d\x65\x3d\x6c\x6f\x77\x65\x72\x2c\x75\x74"
           "\x66\x38\x3d\x31\x2c\x64\x65\x62\x75\x67\x2c\x69\x6f\x63\x68\x61"
           "\x72\x73\x65\x74\x3d\x75\x74\x66\x38\x2c\x73\x68\x6f\x72\x74\x6e"
           "\x61\x6d\x65\x3d\x6d\x69\x78\x65\x64\x2c\x75\x74\x66\x38\x3d\x31"
           "\x2c\x00\x48\x45\x16\x00\x00\x00\x00\x00",
           90);
    memcpy(
        (void*)0x200000000440,
        "\x78\x9c\xec\xdd\x41\x6b\x13\x5b\x18\xc6\xf1\xa7\x4d\x6f\x93\xa6\xb4"
        "\xc9\x85\xcb\x85\x7b\x41\x3d\xe8\x46\x37\xa1\x8d\x1f\x40\x83\xb4\x20"
        "\x06\x94\xda\x14\x75\x21\x4c\xed\x44\x43\xc6\xa4\xcc\x84\x4a\x44\x6c"
        "\x36\xe2\xd6\x0f\xe1\xaa\xe8\xce\x9d\xa0\x2e\xdd\x74\x23\x6e\xdc\xbb"
        "\x2b\x82\xe0\xa6\x0b\x71\xc4\x4c\xd2\x26\x6d\x5a\xd3\x36\x49\x63\xfb"
        "\xff\x41\x99\x37\x79\xcf\xc3\x9c\xb6\xd3\xf2\xa6\xd0\xc9\xda\x8d\x67"
        "\xf7\xf3\x59\x2f\x91\xb5\x4a\x1a\x8c\x18\x0d\x4a\x15\xad\x4b\xf1\x5f"
        "\x55\xcd\x40\xed\x38\x58\xad\x87\xd5\xa8\xa2\x73\xa3\xdf\x3e\x9d\xb8"
        "\x7e\xf3\xd6\x95\x54\x3a\x3d\x35\x63\xcc\x74\x6a\xf6\x7c\xd2\x18\x33"
        "\x7e\xea\xcd\x83\x47\x2f\x4e\xbf\x2b\x8d\xce\xbd\x1a\x7f\x1d\xd6\x6a"
        "\xfc\xf6\xda\xd7\xe4\xe7\xd5\x7f\x57\xff\x5b\xfb\x31\x7b\x2f\xe7\x99"
        "\x9c\x67\x0a\xc5\x92\xb1\xcc\x7c\xb1\x58\xb2\xe6\x1d\xdb\x2c\xe4\xbc"
        "\x7c\xc2\x98\x6b\x8e\x6d\x79\xb6\xc9\x15\x3c\xdb\x6d\xea\x67\x9d\xe2"
        "\xe2\x62\xd9\x58\x85\x85\xb1\xe8\xa2\x6b\x7b\x9e\xb1\x0a\x65\x93\xb7"
        "\xcb\xa6\x54\x34\x25\xb7\x6c\xac\xbb\x56\xae\x60\x12\x89\x84\x19\x8b"
        "\xea\x78\x1b\x6a\x63\x4d\x66\x65\x66\xc6\x4a\xed\xd8\xf6\x43\x1d\xdd"
        "\x11\xba\x6e\xa4\xd5\x93\xae\x9b\xaa\xb4\x6e\x66\x56\x7a\xb0\x27\x00"
        "\x00\xd0\x67\x76\x9f\xff\x83\x59\x7f\xe7\xf9\x3f\x3d\x17\x1c\xdb\x9a"
        "\xff\x5f\x3e\x97\xda\x9b\xff\xa5\x4e\xce\xff\x03\x3d\xfd\x82\xf6\xb9"
        "\x4a\xd3\xa3\xdf\xcc\xff\x38\x12\x5c\x37\x65\x45\x6b\x3f\xbf\xcd\x98"
        "\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\xf8\x13\xac\xfb\x7e\xcc\xf7\xfd\x58\xfd\x58\xff\x08\x4b\x8a\x48"
        "\xaa\x3f\x3e\xec\x7d\xa2\x3b\xf6\xf9\xfd\xbf\x70\x48\xdb\x45\x87\x35"
        "\xfc\xe3\x5e\x44\x72\x9e\x2e\x65\x96\x32\xc1\x31\xe8\xa7\xb2\xca\xc9"
        "\x91\xad\x09\xc5\xf4\xbd\x7a\x3d\xd4\x04\xf5\xf4\xe5\xf4\xd4\x84\xa9"
        "\x8a\xeb\xad\xb3\x5c\xcb\x2f\x2f\x65\x42\x0a\xd7\xf3\x75\xf1\x56\xf9"
        "\x93\x7f\x4f\x06\x79\xd3\x9c\xff\x4b\xd1\xc6\xf3\x27\x15\xd3\x3f\xad"
        "\xcf\x9f\x6c\x99\x1f\xd6\xd9\x33\x0d\xf9\x84\x62\xfa\x70\x47\x45\x39"
        "\x5a\xa8\x5e\xd7\x9b\xf9\xc7\x93\xc6\x5c\xba\x9a\xde\x92\x1f\xa9\xae"
        "\x03\x00\x00\x00\x00\xe0\x28\x48\x98\x0d\xdb\x5e\xbf\x57\xfb\xd5\x05"
        "\x11\x6d\xef\x07\xf9\x3d\xfc\x7d\x60\xcb\xeb\xeb\x21\xfd\xdf\xce\x2d"
        "\x2a\x01\x00\x00\x00\x00\xc0\x81\x79\xe5\x87\x79\xcb\x71\x6c\x77\x1f"
        "\x45\x58\xd2\x01\xe2\x7b\x28\xfc\x81\xae\x9f\xa2\x73\x45\x48\x7d\xb1"
        "\x8d\x2d\xc5\x45\x49\x7d\xb0\x8d\x5e\x15\x11\x49\xc1\x33\x66\x3f\xf1"
        "\x2f\x1b\xf1\xb6\x52\x7e\x1b\x6b\x86\x24\x1d\xf4\xf3\x8a\xf4\xf0\xd2"
        "\x3a\xec\xdf\x4c\x00\x00\x00\x00\x3a\x6d\x73\xe8\xdf\x43\xe8\xe3\x93"
        "\x2e\xee\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x80\xe3\xa7\xdd\xfb\x81\xd5\xd7\x6f"
        "\x6b\xd5\x1b\xbb\xc4\x1b\x4e\x17\xd2\xfb\x8d\xb7\x07\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x8e\x9d\x9f\x01\x00\x00\xff\xff\x75\x88"
        "\x26\x40",
        699);
    syz_mount_image(/*fs=*/0x200000000400, /*dir=*/0x200000000280,
                    /*flags=MS_SYNCHRONOUS|MS_NODEV|MS_NOATIME*/ 0x414,
                    /*opts=*/0x200000000000, /*chdir=*/1, /*size=*/0x2bb,
                    /*img=*/0x200000000440);
    break;
  case 1:
    //  open$dir arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 00} (length 0x2)
    //    }
    //    flags: open_flags = 0x0 (8 bytes)
    //    mode: open_mode = 0x0 (8 bytes)
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000240, ".\000", 2);
    res = syscall(__NR_open, /*file=*/0x200000000240ul, /*flags=*/0ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  renameat arguments: [
    //    oldfd: fd_dir (resource)
    //    old: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    newfd: fd_dir (resource)
    //    new: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //  ]
    memcpy((void*)0x200000000400, "./file0\000", 8);
    memcpy((void*)0x200000000440, "./file1\000", 8);
    syscall(__NR_renameat, /*oldfd=*/r[0], /*old=*/0x200000000400ul,
            /*newfd=*/r[0], /*new=*/0x200000000440ul);
    break;
  case 3:
    //  mkdirat arguments: [
    //    fd: fd_dir (resource)
    //    path: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    mode: open_mode = 0x0 (8 bytes)
    //  ]
    memcpy((void*)0x200000000040, "./file0\000", 8);
    syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000040ul,
            /*mode=*/0ul);
    break;
  case 4:
    //  mknodat arguments: [
    //    dirfd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 2f 66 69 6c 65 32 00} (length 0xe)
    //    }
    //    mode: mknod_mode = 0x0 (8 bytes)
    //    dev: int32 = 0x0 (4 bytes)
    //  ]
    memcpy((void*)0x2000000000c0, "./file1/file2\000", 14);
    syscall(__NR_mknodat, /*dirfd=*/0xffffff9c, /*file=*/0x2000000000c0ul,
            /*mode=*/0ul, /*dev=*/0);
    break;
  case 5:
    //  open arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: open_flags = 0x1492fe (8 bytes)
    //    mode: open_mode = 0x0 (8 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000180, "./bus\000", 6);
    syscall(__NR_open, /*file=*/0x200000000180ul,
            /*flags=O_TRUNC|O_SYNC|O_NOATIME|O_LARGEFILE|O_EXCL|O_CREAT|0x3e*/
            0x1492feul, /*mode=*/0ul);
    break;
  case 6:
    //  mount arguments: [
    //    src: ptr[in, blockdev_filename] {
    //      union blockdev_filename {
    //        loop: loop_filename {
    //          prefix: buffer: {2f 64 65 76 2f 6c 6f 6f 70} (length 0x9)
    //          id: proc = 0x0 (1 bytes)
    //          z: const = 0x0 (1 bytes)
    //        }
    //      }
    //    }
    //    dst: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    type: nil
    //    flags: mount_flags = 0x1000 (8 bytes)
    //    data: nil
    //  ]
    memcpy((void*)0x200000000380, "/dev/loop", 9);
    *(uint8_t*)0x200000000389 = 0x30 + procid * 1;
    *(uint8_t*)0x20000000038a = 0;
    memcpy((void*)0x200000000140, "./bus\000", 6);
    syscall(__NR_mount, /*src=*/0x200000000380ul, /*dst=*/0x200000000140ul,
            /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
    break;
  case 7:
    //  open arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: open_flags = 0x0 (8 bytes)
    //    mode: open_mode = 0x0 (8 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000500, "./bus\000", 6);
    res = syscall(__NR_open, /*file=*/0x200000000500ul, /*flags=*/0ul,
                  /*mode=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 8:
    //  ioctl$LOOP_SET_STATUS64 arguments: [
    //    fd: fd_loop (resource)
    //    cmd: const = 0x4c04 (4 bytes)
    //    arg: ptr[in, loop_info64] {
    //      loop_info64 {
    //        lo_device: const = 0x0 (8 bytes)
    //        lo_inode: const = 0x0 (8 bytes)
    //        lo_rdevice: const = 0x0 (8 bytes)
    //        lo_offset: int64 = 0x0 (8 bytes)
    //        lo_sizelimit: int64 = 0x7fff (8 bytes)
    //        lo_number: const = 0x0 (4 bytes)
    //        lo_enc_type: lo_encrypt_type = 0x0 (4 bytes)
    //        lo_enc_key_size: int32 = 0x0 (4 bytes)
    //        lo_flags: lo_flags = 0x0 (4 bytes)
    //        lo_file_name: buffer: {ef 35 9f 41 3b b9 38 52 f7 d6 a4 ae 6d dd
    //        fb d1 ce 5d 29 c2 ee 5e 5c 9d 00 0f f8 ee 09 e7 37 ff 0e df 11 0f
    //        f4 11 76 39 c2 eb 4b 78 c6 6e e6 77 df 70 19 05 b9 aa fa b4 af aa
    //        f7 55 a3 f6 a0 04} (length 0x40) lo_crypt_name: buffer: {cb a3 d6
    //        25 78 08 20 d1 cb f7 db 71 03 82 59 ca 17 1c e1 a3 11 ef 97 e4 29
    //        8d 1e 14 ef 01 06 00 00 e9 00 96 00 fd ff 00 00 00 00 00 00 00 00
    //        00 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00} (length 0x40)
    //        lo_enc_key: buffer: {be 1d 00 00 ae 9e f3 0b ea 2a 00 40 00 01 00
    //        00 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00} (length 0x20)
    //        lo_init: array[int64] {
    //          int64 = 0x0 (8 bytes)
    //          int64 = 0x0 (8 bytes)
    //        }
    //      }
    //    }
    //  ]
    *(uint64_t*)0x2000000007c0 = 0;
    *(uint64_t*)0x2000000007c8 = 0;
    *(uint64_t*)0x2000000007d0 = 0;
    *(uint64_t*)0x2000000007d8 = 0;
    *(uint64_t*)0x2000000007e0 = 0x7fff;
    *(uint32_t*)0x2000000007e8 = 0;
    *(uint32_t*)0x2000000007ec = 0;
    *(uint32_t*)0x2000000007f0 = 0;
    *(uint32_t*)0x2000000007f4 = 0;
    memcpy((void*)0x2000000007f8,
           "\xef\x35\x9f\x41\x3b\xb9\x38\x52\xf7\xd6\xa4\xae\x6d\xdd\xfb\xd1"
           "\xce\x5d\x29\xc2\xee\x5e\x5c\x9d\x00\x0f\xf8\xee\x09\xe7\x37\xff"
           "\x0e\xdf\x11\x0f\xf4\x11\x76\x39\xc2\xeb\x4b\x78\xc6\x6e\xe6\x77"
           "\xdf\x70\x19\x05\xb9\xaa\xfa\xb4\xaf\xaa\xf7\x55\xa3\xf6\xa0\x04",
           64);
    memcpy((void*)0x200000000838,
           "\xcb\xa3\xd6\x25\x78\x08\x20\xd1\xcb\xf7\xdb\x71\x03\x82\x59\xca"
           "\x17\x1c\xe1\xa3\x11\xef\x97\xe4\x29\x8d\x1e\x14\xef\x01\x06\x00"
           "\x00\xe9\x00\x96\x00\xfd\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00",
           64);
    memcpy((void*)0x200000000878,
           "\xbe\x1d\x00\x00\xae\x9e\xf3\x0b\xea\x2a\x00\x40\x00\x01\x00\x00"
           "\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           32);
    *(uint64_t*)0x200000000898 = 0;
    *(uint64_t*)0x2000000008a0 = 0;
    syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4c04, /*arg=*/0x2000000007c0ul);
    break;
  case 9:
    //  renameat2 arguments: [
    //    oldfd: fd_dir (resource)
    //    old: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 2f 66 69 6c 65 32 00} (length 0xe)
    //    }
    //    newfd: fd_dir (resource)
    //    new: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    flags: renameat2_flags = 0x2 (8 bytes)
    //  ]
    memcpy((void*)0x200000000480, "./file1/file2\000", 14);
    memcpy((void*)0x2000000004c0, "./file0\000", 8);
    syscall(__NR_renameat2, /*oldfd=*/0xffffff9c, /*old=*/0x200000000480ul,
            /*newfd=*/0xffffff9c, /*new=*/0x2000000004c0ul,
            /*flags=RENAME_EXCHANGE*/ 2ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}