// https://syzkaller.appspot.com/bug?id=3e9d281ac24a4e960b4eabe1eb386ffc6c8f8040
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

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

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void 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;
}

//% 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_RDONLY);
  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) {
    if (chdir(target) == -1) {
      err = errno;
      close(res);
      res = -1;
    }
  }

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_RDONLY);
  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")) {
  }
}

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 < 4; 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++) {
    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[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  syz_mount_image$udf arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {75 64 66 00} (length 0x4)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x800 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {00 08 9a af c7 27 34 6c 3e 0d 87 28 52 5a 26
    //          41 b3 b3 16 21 73 0c 58 dc f8 e0 ca 2e 67 67 a4 5a 97 87 76 e9
    //          d2 c6 89 fe ab 83 a1 60 d0 0a 77 ae 51 12 cd 4e 71 41 ca d3 33
    //          d7 cb b6 9d c6 b3 14 60 9d 38 55 f0 26 cb f8 c4 1f f5 b5 65 17
    //          6b 46 1e 93 27 05 9c 11 06 6b a0 b4 b9 5c 12 d2 d9 ff 9c 88 96
    //          d9 e2 47 bd 55 f9 ff 57 8a 06 e0 e9 d0 ca 07 69 33 96 b0 0d 2e
    //          f4 4a db 48 58 47 5a 07 d5 e8 fa 3e f5 b3 06 fe 8a 5d 1c d2 d8
    //          e0 6e 7f 88 22 6e ce 09 2c 6a ab f8 87 0e 14 01 24 d5 a4 86 70
    //          51 3e 0c 41 9c 99 b7 c5 10 59 59 e7 a5 35 f1 26 94 63 4c f2 72
    //          49 0e 00 00} (length 0xbb)
    //        }
    //      }
    //    }
    //    chdir: int8 = 0x81 (1 bytes)
    //    size: len = 0x4ac (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x4ac)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000100, "udf\000", 4);
    memcpy((void*)0x200000000140, "./file1\000", 8);
    memcpy(
        (void*)0x200000000200,
        "\x00\x08\x9a\xaf\xc7\x27\x34\x6c\x3e\x0d\x87\x28\x52\x5a\x26\x41\xb3"
        "\xb3\x16\x21\x73\x0c\x58\xdc\xf8\xe0\xca\x2e\x67\x67\xa4\x5a\x97\x87"
        "\x76\xe9\xd2\xc6\x89\xfe\xab\x83\xa1\x60\xd0\x0a\x77\xae\x51\x12\xcd"
        "\x4e\x71\x41\xca\xd3\x33\xd7\xcb\xb6\x9d\xc6\xb3\x14\x60\x9d\x38\x55"
        "\xf0\x26\xcb\xf8\xc4\x1f\xf5\xb5\x65\x17\x6b\x46\x1e\x93\x27\x05\x9c"
        "\x11\x06\x6b\xa0\xb4\xb9\x5c\x12\xd2\xd9\xff\x9c\x88\x96\xd9\xe2\x47"
        "\xbd\x55\xf9\xff\x57\x8a\x06\xe0\xe9\xd0\xca\x07\x69\x33\x96\xb0\x0d"
        "\x2e\xf4\x4a\xdb\x48\x58\x47\x5a\x07\xd5\xe8\xfa\x3e\xf5\xb3\x06\xfe"
        "\x8a\x5d\x1c\xd2\xd8\xe0\x6e\x7f\x88\x22\x6e\xce\x09\x2c\x6a\xab\xf8"
        "\x87\x0e\x14\x01\x24\xd5\xa4\x86\x70\x51\x3e\x0c\x41\x9c\x99\xb7\xc5"
        "\x10\x59\x59\xe7\xa5\x35\xf1\x26\x94\x63\x4c\xf2\x72\x49\x0e\x00\x00",
        187);
    memcpy(
        (void*)0x200000000940,
        "\x78\x9c\xec\xdb\x4b\x6c\x1b\x55\x17\xc0\xf1\x73\x3c\xb6\xeb\xb8\xf9"
        "\x3e\xdc\x07\x69\x8b\xaa\x62\x09\x24\x42\x4b\xdb\x24\x2e\x69\xab\x20"
        "\xa1\x3c\x88\x40\x6a\x1b\x48\x1a\x10\x15\x0f\x85\xd8\x09\x26\x4e\x1c"
        "\xc5\x29\x24\x55\x4b\xbb\x04\x76\x2c\xba\x64\xc9\x96\x05\x2b\xc4\x16"
        "\x55\x62\x89\x58\xa0\x20\xd4\x5d\xe9\x86\x8d\x57\x94\x1d\xe8\x8e\xe7"
        "\x65\xd7\x49\xec\x26\xf1\x34\xf5\xff\x57\xb5\x77\x1e\xc7\xee\xbd\xf7"
        "\xcc\xcc\xbd\xd7\x89\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x88\x0c\xbd\x36\xd8\xd3\xab\x61\xd7\x02\x00\x00\xb4\xd2\xa5"
        "\x89\xf1\x9e\x0c\xe3\x3f\x00\x00\x6d\xe5\x32\xeb\x7f\x00\x00\x80\x76"
        "\xa2\x62\xc9\x1f\xa2\x72\x72\xae\xac\x17\xed\xfd\x8a\xc4\x85\xfc\xc2"
        "\xd5\x95\xc9\x91\xd1\xfa\x2f\xeb\x50\x51\x89\x88\x65\xc7\x9b\xbf\x89"
        "\xde\xbe\xcc\x99\x97\xfb\xcf\x9e\x73\xcb\x8d\x5f\xbf\xdd\x8e\xc8\xd8"
        "\xc4\xe5\xc1\xf4\x70\x71\x7e\x71\x29\x57\x2a\xe5\xb2\xe9\xc9\x85\xfc"
        "\x74\x31\x9b\x6b\xf8\x1d\xb6\xfa\xfa\x5a\xc7\xed\x0e\x48\xcf\xcf\x5d"
        "\xcd\xce\xcc\x94\xd2\x7d\xa7\x32\x55\xa7\x57\x52\xf7\xf7\xec\xed\x4a"
        "\x0d\xf4\xbf\x3f\x1c\x77\x63\x27\x47\x46\x47\x27\x02\x31\xd1\xd8\x23"
        "\xff\xef\x0f\x59\x6f\x86\x1f\x17\x4b\x5e\x14\x95\x4f\x7e\xf8\x4e\x2f"
        "\x89\x48\x44\xb6\xde\x17\x9b\x5c\x3b\x3b\xad\xc3\x6e\xc4\x71\xbb\x11"
        "\x93\x23\xa3\x76\x43\x0a\xf9\xa9\x85\x65\x73\x52\x23\x4e\x54\xa4\xba"
        "\x4f\xe2\x6e\x1f\xb5\x20\x17\x5b\x12\x11\x31\xf5\xd2\xf8\xf6\xac\xd9"
        "\x62\x62\xc9\x8f\xa2\x32\x74\xba\xac\x63\x22\x62\xb9\xfd\x70\xc2\xfe"
        "\x60\xb8\xa1\xfa\x84\x21\x6a\x96\xae\x22\xd2\x2d\xbb\x20\x67\x8f\xb1"
        "\x3d\x62\xc9\x87\xa2\x72\xe7\x74\x4a\xde\x74\xfa\xd5\xce\x7f\x5c\xe4"
        "\x7a\xd8\x95\xc3\x8e\x8b\x3a\xf7\x7f\x51\xcb\xfa\x96\xfd\x3c\x30\xf7"
        "\x93\x79\x6c\x5e\x78\x3b\xfd\xc6\xc2\x4c\x31\x10\xab\x11\xe7\x8e\x6a"
        "\x66\x7c\xa8\x73\x0f\x86\x3e\x3e\xb4\xd2\x63\xfe\x6c\x4a\x88\x25\x63"
        "\xf6\x1d\x5f\xd6\xf1\xb0\x2b\x83\x96\xeb\x10\x4b\xe6\x45\x25\xfe\xf5"
        "\xa7\xf6\xbc\x42\xec\x79\xe9\x53\x03\x67\x8f\x3d\x7b\x3e\x38\xc3\x38"
        "\xb4\xc9\xfb\x98\xd8\x53\xce\xcd\xd5\xc8\x98\x1c\x73\xa6\x0e\x1a\x31"
        "\x7f\x1e\xa1\xda\xd8\x16\x09\xb5\xe4\x4f\x51\x79\xf0\x7b\xc2\xde\xef"
        "\x76\x72\xc3\x4f\x04\xda\x84\x5a\x52\x10\x95\x7f\x6e\x94\x55\x6b\xd6"
        "\xa5\x56\x60\x7d\xef\xd9\xed\x6b\xc3\x9d\xad\x7f\x47\x62\xb8\xb8\xb8"
        "\xba\x94\x9f\xfd\x78\xb9\xee\xf9\x64\x62\xf0\xa3\xd2\xf2\xd2\xd4\x74"
        "\xfd\xd3\x95\xb5\xab\x15\x3c\xb2\xd9\x3a\xb6\x56\xa4\xb9\x25\x59\x52"
        "\x2b\x2b\xbe\x2f\x3e\x2b\x7b\xaf\x73\xd6\x00\xff\xab\xec\xf9\xb5\xf9"
        "\xf6\xba\x7f\x2d\x74\xd7\x94\xae\xe0\xf5\xd3\xc8\x76\xc3\xcf\x99\x26"
        "\xe6\x51\xa6\x4e\xaa\x96\xdc\x13\x95\x99\x0f\x0e\x57\xc6\x19\x49\x36"
        "\xdd\x37\xed\xc0\xe4\x7f\x54\x54\x4a\xe5\x5f\xd4\xcd\xb4\x93\xff\x68"
        "\x65\x2f\x90\xff\x57\xfc\xfe\x4b\x68\x75\xe9\xb1\x73\xfb\xff\xca\xe7"
        "\x5a\xee\x5c\xe2\xc8\x95\x83\xeb\x1d\xdf\x89\xfc\x9b\x3a\x99\xfc\xbf"
        "\x2b\x2a\x43\x7f\x1f\x76\x3e\xd3\xa8\xe4\xdf\xaa\x89\x35\x71\x5d\xa2"
        "\xf2\xde\xed\xa3\x4e\x5c\x24\x6e\xe2\xa2\x6e\x73\x2a\xef\x38\x93\x2f"
        "\xe4\x7a\x4c\xec\xbf\xa2\xb2\xff\x67\x37\x56\xec\xd8\xa4\x13\x7b\xc0"
        "\x8f\xed\x35\xb1\x25\x51\xf9\xf2\x4e\x75\xec\x5e\x27\xf6\xa0\x1f\xdb"
        "\x67\x62\xd7\x44\xe5\xee\x6f\xf5\x63\x9f\xf6\x63\x33\x26\x76\xd5\xe4"
        "\xeb\x6e\xda\x8d\x4d\x9a\xd8\x63\x4e\x6c\x97\x1f\x7b\x6a\xba\x58\xc8"
        "\x6e\xd6\xad\x26\xff\x7d\xa2\xf2\xce\xcd\xd7\xd5\x6d\xf3\xba\xf9\x0f"
        "\xdc\xff\xb7\x6a\x4a\xcf\x43\x39\xdf\x78\x7b\xbb\xf2\x9f\x0a\x1c\xbb"
        "\xe5\xe4\xf5\x8a\x93\xff\xe8\x26\xf9\xff\x4a\x54\x56\xff\x3a\xea\xb6"
        "\xdb\xee\x7b\xf7\xb2\xda\x67\xff\xeb\xe7\xdf\xcc\x95\xbf\xbf\x5d\x1d"
        "\xeb\x4e\x46\xf7\xfb\xb1\xbd\x8d\x36\x2b\x6c\x26\xff\xfb\x44\xe5\xfe"
        "\xab\x6b\x5e\x9b\x9d\xb6\x39\xbb\x7e\x86\x82\xf9\x7f\x26\x5a\x5d\x7a"
        "\xfd\x1a\x52\xfe\xf7\x05\x8e\xa5\x9c\x7a\xc5\x9b\xec\x8b\x76\x54\x5a"
        "\xbd\x36\x37\x55\x28\xe4\x96\xd8\x60\x83\x0d\x36\xbc\x8d\xb0\x9f\x4c"
        "\x68\x05\x33\xfe\x8f\x9b\x51\xbd\xdf\x52\x77\x1e\xe3\x8c\xff\x9d\x95"
        "\x3d\x7f\xc6\xf4\xe0\x73\x7f\xfc\x1f\xa8\x29\x3d\x21\x8d\xff\xfb\x03"
        "\xc7\x06\x9c\x59\x4b\x2c\x2a\x92\x58\x9e\x5f\x8c\x1d\x12\x49\x94\x56"
        "\xaf\x9d\xcc\xcf\x4f\xcd\xe6\x66\x73\x0b\x99\x33\xfd\x3d\x7d\xe7\xcf"
        "\xf4\x64\xce\xc5\xe2\xee\xe4\xce\xdf\x6a\xb8\xef\x9e\x04\x26\xff\x27"
        "\x44\xe5\xc6\x4f\xbf\x7a\xeb\x98\xea\xf9\x5f\xfd\xf9\x7f\xb2\xa6\xf4"
        "\x84\x94\xff\x03\xc1\x36\x55\xcd\x6b\x1a\xee\x8a\xb6\x64\xf2\xdf\x29"
        "\x2a\xfd\xf7\xd6\xbc\xf5\xe6\x46\xf3\x7f\x77\xfd\xdf\xfd\x5c\x75\xe9"
        "\xdd\x7f\x21\xe5\xff\x60\xe0\x58\xca\xa9\x57\x67\x93\x7d\x01\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbb\x49\x52\x2d\x79\x5e"
        "\x54\x56\xc6\x5f\x52\xf7\x3b\x44\x8d\xfc\xfe\x5f\xb6\xa6\xf4\x84\xf4"
        "\xfb\x5f\x5d\x81\x63\xd9\xed\xff\x5e\x83\xfb\xd5\xa8\xaa\x53\x8d\x56"
        "\x1d\x00\x00\x00\x00\x00\x00\x00\x00\xa0\x95\x22\x62\xc9\x37\xa2\xf2"
        "\x82\x94\xf5\xa6\x39\xd0\x29\x72\x31\x58\xe2\x89\xf6\x5f\x00\x00\x00"
        "\xff\xff\x5e\xae\x42\x17",
        1196);
    syz_mount_image(/*fs=*/0x200000000100, /*dir=*/0x200000000140,
                    /*flags=MS_NODIRATIME*/ 0x800, /*opts=*/0x200000000200,
                    /*chdir=*/0x81, /*size=*/0x4ac, /*img=*/0x200000000940);
    break;
  case 1:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x4c142 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000006a00, "./file1\000", 8);
    res = syscall(
        __NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000006a00ul,
        /*flags=O_NOCTTY|O_NOATIME|O_LARGEFILE|O_DIRECT|O_CREAT|0x2*/ 0x4c142,
        /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  truncate arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    len: intptr = 0x2fffffd (8 bytes)
    //  ]
    memcpy((void*)0x200000006a40, "./file1\000", 8);
    syscall(__NR_truncate, /*file=*/0x200000006a40ul, /*len=*/0x2fffffdul);
    break;
  case 3:
    //  sendfile arguments: [
    //    fdout: fd (resource)
    //    fdin: fd (resource)
    //    off: nil
    //    count: intptr = 0xe3aa6ea (8 bytes)
    //  ]
    syscall(__NR_sendfile, /*fdout=*/r[0], /*fdin=*/r[0], /*off=*/0ul,
            /*count=*/0xe3aa6eaul);
    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 < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}