// https://syzkaller.appspot.com/bug?id=04c4bbcfcf27e23e543489077d32b401a381d33b
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/loop.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif
#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 use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

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;
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

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");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      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;
    }
    remove_dir(cwdbuf);
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x40 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              errors_remount: buffer: {65 72 72 6f 72 73 3d 72 65 6d 6f 75
  //              6e 74 2d 72 6f} (length 0x11)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              max_dir_size_kb: fs_opt["max_dir_size_kb", fmt[hex, int32]] {
  //                name: buffer: {6d 61 78 5f 64 69 72 5f 73 69 7a 65 5f 6b 62}
  //                (length 0xf) eq: const = 0x3d (1 bytes) val: int32 = 0x2 (18
  //                bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x0 (1 bytes)
  //    size: len = 0x4f7 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x4f7)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x2000000004c0, "ext4\000", 5);
  memcpy((void*)0x200000000000, "./file0\000", 8);
  memcpy((void*)0x200000000080, "errors=remount-ro", 17);
  *(uint8_t*)0x200000000091 = 0x2c;
  memcpy((void*)0x200000000092, "max_dir_size_kb", 15);
  *(uint8_t*)0x2000000000a1 = 0x3d;
  sprintf((char*)0x2000000000a2, "0x%016llx", (long long)2);
  *(uint8_t*)0x2000000000b4 = 0x2c;
  *(uint8_t*)0x2000000000b5 = 0;
  memcpy(
      (void*)0x200000000540,
      "\x78\x9c\xec\xdd\xcf\x6f\x23\x57\x1d\x00\xf0\xef\x4c\xe2\x4d\x9a\xa6\x4d"
      "\x0a\x95\x0a\x08\xe8\x52\x0a\x0b\x5a\xad\x9d\x78\xdb\xa8\xea\xa9\x5c\x40"
      "\xa8\xaa\x84\xa8\x38\x71\x48\x43\xe2\x8d\xa2\xd8\x71\x14\x3b\xa5\x09\x2b"
      "\x35\xf9\x1f\x90\xa8\xc4\x01\xc1\x89\x33\x07\x24\x0e\x95\x7a\xe2\x88\xe0"
      "\x06\xb7\xbd\x2c\x07\xa4\x05\x56\xa0\x0d\x12\x07\xa3\xf1\x8f\x6c\x76\x63"
      "\x27\x61\xd7\xb1\x55\xfb\xf3\x91\x46\x33\x6f\xde\x78\xbe\xef\xad\x35\xef"
      "\x79\xbf\x49\xfc\x02\x18\x5b\x57\x23\xe2\x20\x22\xae\x44\xc4\x7b\x11\x31"
      "\xd7\x3e\x9f\xb4\xb7\x78\xab\xb5\x65\xd7\x3d\xb8\x7f\x7b\xf5\xe8\xfe\xed"
      "\xd5\x24\x1a\x8d\x77\xff\x91\x34\xeb\xb3\x73\x71\xe2\x35\x99\x67\xdb\xf7"
      "\x9c\x8e\x88\xef\x7f\x27\xe2\x47\xc9\xe9\xb8\xb5\xbd\xfd\xcd\x95\x72\xb9"
      "\xb4\xd3\x2e\x17\xea\x95\xed\x42\x6d\x6f\xff\xc6\x46\x65\x65\xbd\xb4\x5e"
      "\xda\x2a\x16\x97\x16\x97\x16\xde\xb8\xf9\x7a\xb1\x6f\x7d\x7d\xb9\xf2\x9b"
      "\x7b\xdf\xde\x78\xfb\x07\x1f\xff\xee\x4b\x77\xff\x74\xf0\xcd\x9f\x64\xcd"
      "\x9a\x6d\xd7\x9d\xec\x47\x3f\xb5\xba\x9e\x3b\x8e\x93\x99\x8c\x88\xb7\x2f"
      "\x23\xd8\x10\x4c\xb4\xfb\x73\x65\xd8\x0d\xe1\x89\xa4\x11\xf1\x99\x88\x78"
      "\xa5\xf9\xfc\xcf\xc5\x44\xf3\xdd\xbc\x98\x2e\x8f\x35\x00\xf0\x29\xd0\x68"
      "\xcc\x45\x63\xee\x64\x19\x00\x18\x75\x69\x33\x07\x96\xa4\xf9\x76\x2e\x60"
      "\x36\xd2\x34\x9f\x6f\xe5\xf0\x5e\x8c\x99\xb4\x5c\xad\xd5\xaf\xdf\xaa\xee"
      "\x6e\xad\xb5\x72\x65\xf3\x91\x4b\x6f\x6d\x94\x4b\x0b\xed\x5c\xe1\x7c\xe4"
      "\x92\xac\xbc\xf8\x61\x76\xfc\xb0\x5c\x8c\x47\xcb\x37\x23\xe2\x85\x88\xf8"
      "\xe9\xd4\x33\xcd\x72\x7e\xf5\xe2\x79\x06\x00\xa0\xbf\x9e\x7d\x6c\xfe\xff"
      "\xf7\x54\x6b\xfe\x07\x00\x46\xdc\xf4\x79\x17\x2c\x0f\xa6\x1d\x00\xc0\xe0"
      "\x9c\x3b\xff\x03\x00\x23\xc7\xfc\x0f\x00\xe3\xc7\xfc\x0f\x00\xe3\xc7\xfc"
      "\x0f\x00\xe3\xc7\xfc\x0f\x00\xe3\xe6\x4e\x67\xfe\x9f\x18\x76\x4b\x00\x80"
      "\x81\xf8\xde\x3b\xef\x64\x5b\xe3\xa8\xfd\xfd\xd7\x6b\xef\xef\xed\x6e\x56"
      "\xdf\xbf\xb1\x56\xaa\x6d\xe6\x2b\xbb\xab\xf9\xd5\xea\xce\x76\x7e\xbd\x5a"
      "\x5d\x2f\x97\xf2\xab\xd5\xca\x79\xf7\x2b\x57\xab\xdb\x8b\xaf\xc5\xee\x07"
      "\x85\x7a\xa9\x56\x2f\xd4\xf6\xf6\x97\x2b\xd5\xdd\xad\xfa\x72\xf3\x7b\xbd"
      "\x97\x4b\xb9\x81\xf4\x0a\x00\x38\xcb\x0b\x2f\x7f\xf2\x97\x24\x22\x0e\xde"
      "\x7c\xa6\xb9\xc5\x89\xb5\x1c\xcc\xd5\x30\xda\xd2\x61\x37\x00\x18\x1a\x39"
      "\x7f\x18\x5f\xbe\x85\x1b\xc6\x97\xff\xe3\x03\xe7\xad\xe5\xd9\xf3\x57\x84"
      "\x3f\x7a\x82\x60\x8d\x0f\x9f\xe0\x45\x40\xbf\x5d\xfb\xbc\xfc\x3f\x8c\x2b"
      "\xf9\x7f\x18\x5f\xf2\xff\x30\xbe\xe4\xff\x61\x7c\x35\x1a\x49\xaf\x35\xff"
      "\xd3\xe3\x4b\x00\x80\x91\x22\xc7\x0f\x0c\xf4\xe7\xff\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x30\x22\x66\x9b\xdb\xfc\x89\x72\x9a\xe6\xf3\x11\xcf\x45\xc4\x7c\xe4"
      "\x92\x5b\x1b\xe5\xd2\x42\x44\x3c\x1f\x11\x7f\x9e\xca\x4d\x65\xe5\xc5\xa1"
      "\xb6\x18\x00\x78\x7a\xe9\xdf\x92\xf6\xfa\x5f\xd7\xe6\x5e\x9d\x7d\xbc\xf6"
      "\x4a\xf2\x9f\xa9\xe6\x3e\x22\x7e\xfc\xf3\x77\x7f\xf6\xc1\x4a\xbd\xbe\xb3"
      "\x98\x9d\xff\xe7\xf1\xf9\xfa\x47\xed\xf3\xc5\x61\xb4\x1f\x00\x38\x4f\x67"
      "\x9e\xee\xcc\xe3\x1d\x0f\xee\xdf\x5e\xed\x6c\x83\x6c\xcf\xbd\x6f\xb5\x16"
      "\x17\xcd\xe2\x1e\xb5\xb7\x56\xcd\x64\x4c\x66\xbb\x3f\x4e\x47\x2e\x22\x66"
      "\xfe\x95\xb4\xca\x6d\xd9\xe7\x95\x89\x3e\xc4\x3f\x38\x8c\x88\xcf\x75\xeb"
      "\x7f\xd2\xcc\x8d\xcc\xb7\x57\x3e\x7d\x3c\x7e\x16\xfb\xb9\x81\xc6\x4f\x1f"
      "\x89\x9f\x36\xeb\x5a\xfb\xec\xdf\xe2\xb3\xa7\xee\x3c\xd5\x33\xe6\x79\x6b"
      "\xbd\xc2\xb8\xf8\x24\x1b\x7f\xde\xea\xf6\xfc\xa5\x71\xb5\xb9\x9f\xee\xba"
      "\xf8\xf1\x74\x73\x84\x7a\x7a\x9d\xf1\xef\xe8\xd4\xf8\xd7\x79\xde\xa7\x9b"
      "\x63\x4d\xb7\xf1\xef\xea\x45\x63\xbc\xf6\xfb\xef\xf6\xac\x3b\x8c\xf8\xc2"
      "\x64\xb7\xf8\xc9\x71\xfc\xa4\x47\xfc\x57\x2f\x18\xff\xce\x17\xbf\xfc\x4a"
      "\xaf\xba\xc6\x2f\x23\xae\x45\xf7\xf8\x27\x63\x15\xea\x95\xed\x42\x6d\x6f"
      "\xff\xc6\x46\x65\x65\xbd\xb4\x5e\xda\x2a\x16\x97\x16\x97\x16\xde\xb8\xf9"
      "\x7a\xb1\xd0\xcc\x51\x17\x3a\x99\xea\xd3\xfe\xfe\xe6\xf5\xe7\x7b\xf6\xff"
      "\xd7\x11\x33\x3d\xe2\x4f\x9f\xd3\xff\xaf\x9d\xd9\xeb\xc6\xf1\x00\xfc\xab"
      "\xff\xbe\xf7\xc3\xaf\xf4\x8a\x7f\x18\xf1\x8d\xaf\x76\x7f\xff\x5f\x3c\x23"
      "\x7e\x36\x27\x7e\xfd\xcc\xf8\x0f\xad\xcc\xfc\xb6\xe7\xf2\xdd\x59\xfc\xb5"
      "\x56\xff\x0f\xff\xdf\xf7\xff\xfa\x05\xe3\xdf\xfd\xeb\xfe\xda\x05\x2f\x05"
      "\x00\x06\xa0\xb6\xb7\xbf\xb9\x52\x2e\x97\x76\xfa\x7a\x90\x8b\x3e\xdf\xf0"
      "\xc4\x41\x72\x49\x6d\x76\x30\xe2\x07\xd9\xe7\xf1\xa7\xbd\xcf\x4b\xed\x94"
      "\x59\xd7\x6b\xfe\xf0\x8b\x8f\x5f\xca\x2a\x87\xde\xd3\xbe\x1c\x0c\x79\x60"
      "\x02\x2e\xdd\xc3\x87\x7e\xd8\x2d\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x7a\xb9\xf4\x3f\x27\x4a\x87\xdd\x43\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x46"
      "\xd9\xff\x02\x00\x00\xff\xff\x3c\x10\xcb\x2f",
      1271);
  syz_mount_image(/*fs=*/0x2000000004c0, /*dir=*/0x200000000000,
                  /*flags=MS_MANDLOCK*/ 0x40, /*opts=*/0x200000000080,
                  /*chdir=*/0, /*size=*/0x4f7, /*img=*/0x200000000540);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: open_flags = 0x141842 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000440, "./bus\000", 6);
  syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000440ul,
          /*flags=O_SYNC|O_NONBLOCK|O_NOATIME|O_CREAT|O_RDWR*/ 0x141842,
          /*mode=*/0);
  //  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);
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: open_flags = 0x187102 (8 bytes)
  //    mode: open_mode = 0x1 (8 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000240, "./bus\000", 6);
  res = syscall(
      __NR_open, /*file=*/0x200000000240ul,
      /*flags=O_SYNC|O_NOCTTY|O_DIRECT|O_CLOEXEC|FASYNC|0x2*/ 0x187102ul,
      /*mode=S_IXOTH*/ 1ul);
  if (res != -1)
    r[0] = res;
  //  mmap arguments: [
  //    addr: VMA[0x800000]
  //    len: len = 0x800000 (8 bytes)
  //    prot: mmap_prot = 0x2 (8 bytes)
  //    flags: mmap_flags = 0x28011 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x800000ul,
          /*prot=PROT_WRITE*/ 2ul,
          /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
          /*fd=*/r[0], /*offset=*/0ul);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x11 (4 bytes)
  //        ninsn: bytesize8 = 0xc (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //              00 85 00 00 00 08 00 00 00 18 01 00 00 20 64 6c 25 00 00 00 00
  //              00 20} (length 0x26)
  //            }
  //          }
  //        }
  //        license: nil
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x40f00 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x34 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x9 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x0 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x200000000600 = 0x11;
  *(uint32_t*)0x200000000604 = 0xc;
  *(uint64_t*)0x200000000608 = 0x200000000440;
  memcpy((void*)0x200000000440,
         "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85"
         "\x00\x00\x00\x08\x00\x00\x00\x18\x01\x00\x00\x20\x64\x6c\x25\x00\x00"
         "\x00\x00\x00\x20",
         38);
  *(uint64_t*)0x200000000610 = 0;
  *(uint32_t*)0x200000000618 = 0;
  *(uint32_t*)0x20000000061c = 0;
  *(uint64_t*)0x200000000620 = 0;
  *(uint32_t*)0x200000000628 = 0x40f00;
  *(uint32_t*)0x20000000062c = 0x34;
  memset((void*)0x200000000630, 0, 16);
  *(uint32_t*)0x200000000640 = 0;
  *(uint32_t*)0x200000000644 = 9;
  *(uint32_t*)0x200000000648 = -1;
  *(uint32_t*)0x20000000064c = 0;
  *(uint64_t*)0x200000000650 = 0;
  *(uint32_t*)0x200000000658 = 0;
  *(uint32_t*)0x20000000065c = 0;
  *(uint64_t*)0x200000000660 = 0;
  *(uint32_t*)0x200000000668 = 0;
  *(uint32_t*)0x20000000066c = 0;
  *(uint32_t*)0x200000000670 = 0;
  *(uint32_t*)0x200000000674 = 0;
  *(uint64_t*)0x200000000678 = 0;
  *(uint64_t*)0x200000000680 = 0;
  *(uint32_t*)0x200000000688 = 0;
  *(uint32_t*)0x20000000068c = 0;
  *(uint32_t*)0x200000000690 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000600ul, /*size=*/0x94ul);
  //  chdir arguments: [
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //  ]
  memcpy((void*)0x200000000240, "./file0\000", 8);
  syscall(__NR_chdir, /*dir=*/0x200000000240ul);
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 00} (length 0x2)
  //    }
  //    flags: open_flags = 0x0 (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x2000000000c0, ".\000", 2);
  res = syscall(__NR_open, /*file=*/0x2000000000c0ul, /*flags=*/0ul,
                /*mode=*/0ul);
  if (res != -1)
    r[1] = res;
  //  lseek arguments: [
  //    fd: fd (resource)
  //    offset: intptr = 0x7ff (8 bytes)
  //    whence: seek_whence = 0x0 (8 bytes)
  //  ]
  syscall(__NR_lseek, /*fd=*/r[1], /*offset=*/0x7fful, /*whence=*/0ul);
  //  getdents64 arguments: [
  //    fd: fd_dir (resource)
  //    ent: nil
  //    count: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_getdents64, /*fd=*/r[1], /*ent=*/0ul, /*count=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}