// https://syzkaller.appspot.com/bug?id=899b37f20ce4072bcdfecfe1647b39602e956e36
// 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 <sched.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/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/futex.h>
#include <linux/loop.h>

#ifndef __NR_io_uring_register
#define __NR_io_uring_register 427
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#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 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;
}

#define MAX_FDS 30

//% 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 setup_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  if (getppid() == 1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

#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 close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static const char* setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0) &&
      errno != EBUSY) {
    return NULL;
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:") ||
      !write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC"))
    return "write(/proc/sys/fs/binfmt_misc/register) failed";
  return NULL;
}

static const char* setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    return "failed to chmod /dev/raw-gadget";
  return NULL;
}

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 < 6; 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);
  close_fds();
}

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_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  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 = 0xa00008 (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 {
    //              min_batch_time: fs_opt["min_batch_time", fmt[hex, int32]] {
    //                name: buffer: {6d 69 6e 5f 62 61 74 63 68 5f 74 69 6d 65}
    //                (length 0xe) eq: const = 0x3d (1 bytes) val: int32 = 0x2d
    //                (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              mb_optimize_scan: fs_opt["mb_optimize_scan", fmt[hex,
    //              int32[0:1]]] {
    //                name: buffer: {6d 62 5f 6f 70 74 69 6d 69 7a 65 5f 73 63
    //                61 6e} (length 0x10) eq: const = 0x3d (1 bytes) val: int32
    //                = 0x1 (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              noblock_validity: buffer: {6e 6f 62 6c 6f 63 6b 5f 76 61 6c
    //              69 64 69 74 79} (length 0x10)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //        }
    //        common: array[fs_opt_elem[fs_options_common]] {
    //        }
    //        null: const = 0x0 (1 bytes)
    //      }
    //    }
    //    chdir: int8 = 0x1 (1 bytes)
    //    size: len = 0x7ad (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x7ad)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000780, "ext4\000", 5);
    memcpy((void*)0x2000000000c0, "./file0\000", 8);
    memcpy((void*)0x200000000140, "min_batch_time", 14);
    *(uint8_t*)0x20000000014e = 0x3d;
    sprintf((char*)0x20000000014f, "0x%016llx", (long long)0x2d);
    *(uint8_t*)0x200000000161 = 0x2c;
    memcpy((void*)0x200000000162, "mb_optimize_scan", 16);
    *(uint8_t*)0x200000000172 = 0x3d;
    sprintf((char*)0x200000000173, "0x%016llx", (long long)1);
    *(uint8_t*)0x200000000185 = 0x2c;
    memcpy((void*)0x200000000186, "noblock_validity", 16);
    *(uint8_t*)0x200000000196 = 0x2c;
    *(uint8_t*)0x200000000197 = 0;
    memcpy(
        (void*)0x2000000007c0,
        "\x78\x9c\xec\xdd\xcf\x6b\x1b\x57\x1e\x00\xf0\xef\xc8\x3f\xe3\x64\xd7"
        "\x5e\x58\xd8\xcd\x9e\x0c\x0b\xbb\x86\x10\x79\x9d\xf5\x26\xbb\xb0\xb0"
        "\x59\xf6\xb0\x14\x1a\x08\xb4\xe7\x24\x46\x56\x4c\x6a\xd9\x0a\x96\x1c"
        "\x62\x63\x48\x42\x29\xf4\xd2\x43\x4b\x0f\x85\xe6\x92\x73\xd3\xa6\xb7"
        "\x5c\xfb\xe3\xda\x5e\xfa\x37\xf4\x50\x12\xd2\xd6\x09\x4d\xe9\xa1\xb8"
        "\x8c\x34\x4a\x64\x5b\x72\x9c\xc4\x92\x52\xfc\xf9\xc0\x58\xef\xcd\x8c"
        "\xf4\xde\x77\xde\xcc\x9b\x67\xcd\xa0\x09\x60\xdf\x1a\x4f\xff\xe4\x22"
        "\x0e\x47\x0c\xa4\xc9\xd1\x6c\x7e\x12\xd9\x8c\xe8\x8f\x38\x59\x5f\xef"
        "\xe1\xfa\x5a\x21\x9d\x92\xd8\xd8\x78\xe5\xbb\xa4\xb6\xce\x83\xf5\xb5"
        "\x42\x34\xbd\x27\x75\x30\xcb\xfc\x31\x22\x3e\x7b\x23\xe2\x48\x6e\x7b"
        "\xb9\x95\x95\xd5\xf9\x99\x52\xa9\xb8\x94\xe5\x27\xab\x0b\x17\x27\x2b"
        "\x2b\xab\x47\x2f\x2c\xcc\xcc\x15\xe7\x8a\x8b\xc7\xa7\xa6\xa7\x8f\x9d"
        "\xf8\xc7\x89\xe3\x7b\x17\xeb\x0f\x5f\xae\x1e\xba\xfb\xf6\xff\xff\xfa"
        "\xd1\xc9\x9f\x5e\xff\xc3\xad\xb7\x3e\x4f\xe2\x64\x1c\xca\x96\x35\xc7"
        "\xb1\x57\xc6\x63\x3c\xdb\x26\x03\xe9\x26\xdc\xe4\x7f\x7b\x5d\x58\x8f"
        "\x25\xbd\xae\x00\xcf\x24\x3d\x34\xfb\xea\x47\x79\x1c\x8e\xd1\xe8\xdb"
        "\xa1\x25\xff\xd3\xd5\x9a\x01\x00\x9d\x72\x25\x22\x36\x00\x80\x7d\x26"
        "\x71\xfe\x07\x80\x7d\xa6\xf1\x3d\xc0\x83\xf5\xb5\x42\x63\x8a\xfa\xf5"
        "\x9c\xab\x3d\xfd\x62\xa2\x4b\xee\xfd\x37\x22\x86\xeb\xf1\x37\xae\x6f"
        "\xd6\x97\xf4\xd7\xaf\xd9\x7d\x35\x5c\xbb\x0e\x3a\xf2\x20\xa9\x5d\x23"
        "\x69\x48\x22\x62\x6c\x0f\xca\x1f\x8f\x88\xeb\xb7\xcf\xdc\x4c\xa7\xe8"
        "\xd0\x75\x48\x80\x56\xae\x5e\x8b\x88\x73\x63\xe3\x5b\xfb\xff\xb4\x87"
        "\xdb\x7a\xcf\xc2\xd3\xfa\xdb\x2e\xd6\x19\xdf\x92\xd7\xff\x41\xf7\x7c"
        "\x92\x8e\x7f\xfe\xb9\x7d\xfc\x17\x91\xcb\x8e\xff\xe1\xda\xdf\xad\xe3"
        "\x9f\xa1\x16\xc7\xee\xb3\x78\xf2\xf1\x9f\xbb\xb3\x29\x3b\xb0\x07\x85"
        "\x36\x49\xc7\x7f\xff\x6e\xba\xb7\xed\x61\x53\xfc\x99\xb1\xbe\x2c\xf7"
        "\x9b\xda\x98\x6f\x20\x39\x7f\xa1\x54\x4c\xfb\xb6\xdf\x46\xc4\x44\x0c"
        "\x0c\xa5\xf9\xa9\x1d\xca\x98\xb8\xff\xf3\xfd\x76\xcb\x9a\xc7\x7f\xdf"
        "\xbf\xf3\xda\x07\x69\xf9\xe9\xeb\xe3\x35\x72\x77\xfa\x87\x36\xbf\x67"
        "\x76\xa6\x3a\xf3\x3c\x31\x37\xbb\x77\x2d\xe2\x4f\xfd\xad\xe2\x4f\x1e"
        "\xb5\x7f\xd2\x66\xfc\x7b\x7a\x97\x65\xbc\xf4\xaf\x37\xdf\x6f\xb7\x2c"
        "\x8d\x3f\x8d\xb7\x31\x6d\x8f\xbf\xb3\x36\x6e\x44\xfc\xa5\x65\xfb\x3f"
        "\xbe\x0f\x2a\xd9\xf1\xfe\xc4\xc9\xda\xee\x30\xd9\xd8\x29\x5a\xf8\xf8"
        "\xeb\xf7\x46\xda\x95\xdf\xdc\xfe\xd7\x6f\xa7\x25\xad\x15\x1a\xff\x0b"
        "\x74\x43\xda\xfe\x23\x3b\xc7\x3f\x96\x34\xdf\xaf\x59\x79\xfa\x32\xbe"
        "\xb8\x31\xfa\x69\xbb\x65\x9b\xe3\x3f\x73\x33\x2d\x7f\x73\xfc\xad\xf7"
        "\xff\xc1\xe4\xd5\x5a\x7a\x30\x9b\x77\x79\xa6\x5a\x5d\x9a\x8a\x18\x4c"
        "\x5e\xde\x3e\xff\xd8\xe3\xf7\x36\xf2\x8d\xf5\xd3\xf8\x27\xfe\xdc\xfa"
        "\xf8\xdf\x69\xff\x4f\xbb\xa1\x73\x59\x7a\xe3\x09\x37\x3f\xf6\xdf\xfd"
        "\xf6\xc3\x67\x8f\xbf\xb3\xd2\xf8\x67\xd3\xf6\x4f\xb2\x20\x9e\xd8\xfe"
        "\x4f\x9f\xb8\xf5\x70\xbe\xaf\x5d\xf9\xbb\x6b\xff\xe9\x5a\x6a\x22\x9b"
        "\xb3\xbd\xff\xeb\xdf\xf6\xb9\xbb\xad\xe0\x73\x6d\x3c\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd8\xa5"
        "\x5c\x44\x1c\x8a\x24\x97\x7f\x94\xce\xe5\xf2\xf9\xfa\x33\xbc\x7f\x1f"
        "\x23\xb9\x52\xb9\x52\x3d\x72\xbe\xbc\xbc\x38\x1b\xb5\x67\x65\x8f\xc5"
        "\x40\xae\xf1\x53\x97\xa3\x4d\xbf\x87\x3a\x95\xfd\x1e\x7e\x23\x7f\x6c"
        "\x4b\xfe\xef\x11\xf1\xbb\x88\x78\x77\xe8\x40\x2d\x9f\x2f\x94\x4b\xb3"
        "\xbd\x0e\x1e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x32\x07\xdb\x3c\xff\x3f\xf5\xcd\x50\xaf\x6b\x07\x00\x74\xcc\x70\xaf"
        "\x2b\x00\x00\x74\x9d\xf3\x3f\x00\xec\x3f\x6d\xce\xff\x83\xad\x67\x1f"
        "\xe8\x68\x5d\x00\x80\xee\xa8\x9d\xff\x93\xfe\x5e\x57\x03\x00\xe8\x22"
        "\xdf\xff\x03\xc0\xfe\xe3\xfc\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x40\x87\x9d\x3e\x75\x2a\x9d\x36\x7e\x5c"
        "\x5f\x2b\xa4\xf9\xd9\x4b\x2b\xcb\xf3\xe5\x4b\x47\x67\x8b\x95\xf9\xfc"
        "\xc2\x72\x21\x5f\x28\x2f\x5d\xcc\xcf\x95\xcb\x73\xa5\x62\xbe\x50\x5e"
        "\x68\xfb\x41\x57\xeb\x2f\xa5\x72\xf9\xe2\x74\x2c\x2e\x5f\x9e\xac\x16"
        "\x2b\xd5\xc9\xca\xca\xea\xd9\x85\xf2\xf2\x62\xf5\xec\x85\x85\x99\xb9"
        "\xe2\xd9\xe2\x40\xd7\x22\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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        "\x57\x5e\x88\x6a\x5c\xcb\x9a\xad\xd7\x5b\x43\xe2\x85\x48\x0c\x45\x44"
        "\xa7\x8a\x68\xee\x25\x0e\xf4\xa6\x73\x02\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf8\x15"
        "\xf8\x25\x00\x00\xff\xff\x6a\xb2\x1f\xd8",
        1965);
    syz_mount_image(/*fs=*/0x200000000780, /*dir=*/0x2000000000c0,
                    /*flags=MS_I_VERSION|MS_RELATIME|MS_NOEXEC*/ 0xa00008,
                    /*opts=*/0x200000000140, /*chdir=*/1, /*size=*/0x7ad,
                    /*img=*/0x2000000007c0);
    break;
  case 1:
    //  io_uring_setup arguments: [
    //    entries: int32 = 0x1a8 (4 bytes)
    //    params: ptr[inout, io_uring_params] {
    //      io_uring_params {
    //        sq_entries: int32 = 0x0 (4 bytes)
    //        cq_entries: int32 = 0x20fca0 (4 bytes)
    //        flags: io_uring_setup_flags = 0x0 (4 bytes)
    //        sq_thread_cpu: int32 = 0x2000003 (4 bytes)
    //        sq_thread_idle: int32 = 0x22f (4 bytes)
    //        features: int32 = 0x0 (4 bytes)
    //        wq_fd: fd_io_uring (resource)
    //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
    //        sq_off: io_sqring_offsets {
    //          head: int32 = 0x0 (4 bytes)
    //          tail: int32 = 0x0 (4 bytes)
    //          ring_mask: int32 = 0x0 (4 bytes)
    //          ring_entries: int32 = 0x0 (4 bytes)
    //          flags: int32 = 0x0 (4 bytes)
    //          dropped: int32 = 0x0 (4 bytes)
    //          array: int32 = 0x0 (4 bytes)
    //          resv1: int32 = 0x0 (4 bytes)
    //          user_addr: int64 = 0x0 (8 bytes)
    //        }
    //        cq_off: io_cqring_offsets {
    //          head: int32 = 0x0 (4 bytes)
    //          tail: int32 = 0x0 (4 bytes)
    //          ring_mask: int32 = 0x0 (4 bytes)
    //          ring_entries: int32 = 0x0 (4 bytes)
    //          overflow: int32 = 0x0 (4 bytes)
    //          cqes: int32 = 0x0 (4 bytes)
    //          flags: int32 = 0x0 (4 bytes)
    //          resv1: int32 = 0x0 (4 bytes)
    //          user_addr: int64 = 0x0 (8 bytes)
    //        }
    //      }
    //    }
    //  ]
    //  returns fd_io_uring
    *(uint32_t*)0x2000000000c4 = 0x20fca0;
    *(uint32_t*)0x2000000000c8 = 0;
    *(uint32_t*)0x2000000000cc = 0x2000003;
    *(uint32_t*)0x2000000000d0 = 0x22f;
    *(uint32_t*)0x2000000000d8 = -1;
    memset((void*)0x2000000000dc, 0, 12);
    res = syscall(__NR_io_uring_setup, /*entries=*/0x1a8,
                  /*params=*/0x2000000000c0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x105042 (4 bytes)
    //    mode: open_mode = 0xc4 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000080, "./file1\000", 8);
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul,
                  /*flags=O_SYNC|O_DIRECT|O_CREAT|O_RDWR*/ 0x105042,
                  /*mode=S_IROTH|S_IXUSR|S_IWUSR*/ 0xc4);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    //  mmap$IORING_OFF_SQ_RING arguments: [
    //    addr: VMA[0x3000]
    //    len: len = 0x3000 (8 bytes)
    //    prot: mmap_prot = 0x2 (8 bytes)
    //    flags: mmap_flags = 0x11 (8 bytes)
    //    fd: fd_io_uring (resource)
    //    offset: const = 0x0 (8 bytes)
    //  ]
    //  returns ring_ptr
    syscall(__NR_mmap, /*addr=*/0x200000001000ul, /*len=*/0x3000ul,
            /*prot=PROT_WRITE*/ 2ul, /*flags=MAP_FIXED|MAP_SHARED*/ 0x11ul,
            /*fd=*/r[1], /*offset=*/0ul);
    break;
  case 4:
    //  read arguments: [
    //    fd: fd (resource)
    //    buf: ptr[out, buffer] {
    //      buffer: (DirOut)
    //    }
    //    count: len = 0x1000 (8 bytes)
    //  ]
    syscall(__NR_read, /*fd=*/r[1], /*buf=*/0x200000001400ul,
            /*count=*/0x1000ul);
    break;
  case 5:
    //  io_uring_register$IORING_REGISTER_RING_FDS arguments: [
    //    fd: fd_io_uring (resource)
    //    opcode: const = 0x13 (8 bytes)
    //    arg: ptr[in, array[io_uring_rsrc_register]] {
    //      array[io_uring_rsrc_register] {
    //      }
    //    }
    //    nr_args: len = 0x2 (8 bytes)
    //  ]
    syscall(__NR_io_uring_register, /*fd=*/r[0], /*opcode=*/0x13ul,
            /*arg=*/0x200000001bc0ul, /*nr_args=*/2ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  if ((reason = setup_binfmt_misc()))
    printf("the reproducer may not work as expected: binfmt_misc setup failed: "
           "%s\n",
           reason);
  if ((reason = setup_usb()))
    printf("the reproducer may not work as expected: USB injection setup "
           "failed: %s\n",
           reason);
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}