// https://syzkaller.appspot.com/bug?id=30716337d21954f2e093d904107988400c0778dd
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

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

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
#ifndef __NR_pwritev2
#define __NR_pwritev2 328
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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_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")) {
  }
}

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);
}

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 31 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x210000 (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 {
    //              user_xattr: buffer: {75 73 65 72 5f 78 61 74 74 72} (length
    //              0xa)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              noquota: buffer: {6e 6f 71 75 6f 74 61} (length 0x7)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
    //              63 6b} (length 0xe)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              jqfmt_vfsv1: buffer: {6a 71 66 6d 74 3d 76 66 73 76 31}
    //              (length 0xb)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              debug_want_extra_isize: fs_opt["debug_want_extra_isize",
    //              fmt[hex, int32]] {
    //                name: buffer: {64 65 62 75 67 5f 77 61 6e 74 5f 65 78 74
    //                72 61 5f 69 73 69 7a 65} (length 0x16) eq: const = 0x3d (1
    //                bytes) val: int32 = 0x70 (18 bytes)
    //              }
    //            }
    //            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 =
    //                0x7b1 (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              stripe: fs_opt["stripe", fmt[hex, int32]] {
    //                name: buffer: {73 74 72 69 70 65} (length 0x6)
    //                eq: const = 0x3d (1 bytes)
    //                val: int32 = 0x20 (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              bsdgroups: buffer: {62 73 64 67 72 6f 75 70 73} (length 0x9)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              max_batch_time: fs_opt["max_batch_time", fmt[hex, int32]] {
    //                name: buffer: {6d 61 78 5f 62 61 74 63 68 5f 74 69 6d 65}
    //                (length 0xe) eq: const = 0x3d (1 bytes) val: int32 = 0x3fe
    //                (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              user_xattr: buffer: {75 73 65 72 5f 78 61 74 74 72} (length
    //              0xa)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              noinit_itable: buffer: {6e 6f 69 6e 69 74 5f 69 74 61 62 6c
    //              65} (length 0xd)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //        }
    //        common: array[fs_opt_elem[fs_options_common]] {
    //        }
    //        null: const = 0x0 (1 bytes)
    //      }
    //    }
    //    chdir: int8 = 0x3 (1 bytes)
    //    size: len = 0x583 (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x583)
    //    }
    //  ]
    //  returns fd_dir
    NONFAILING(memcpy((void*)0x200000000040, "ext4\000", 5));
    NONFAILING(memcpy((void*)0x200000000200, "./file1\000", 8));
    NONFAILING(memcpy((void*)0x200000000280, "user_xattr", 10));
    NONFAILING(*(uint8_t*)0x20000000028a = 0x2c);
    NONFAILING(memcpy((void*)0x20000000028b, "noquota", 7));
    NONFAILING(*(uint8_t*)0x200000000292 = 0x2c);
    NONFAILING(memcpy((void*)0x200000000293, "dioread_nolock", 14));
    NONFAILING(*(uint8_t*)0x2000000002a1 = 0x2c);
    NONFAILING(memcpy((void*)0x2000000002a2, "jqfmt=vfsv1", 11));
    NONFAILING(*(uint8_t*)0x2000000002ad = 0x2c);
    NONFAILING(memcpy((void*)0x2000000002ae, "debug_want_extra_isize", 22));
    NONFAILING(*(uint8_t*)0x2000000002c4 = 0x3d);
    NONFAILING(sprintf((char*)0x2000000002c5, "0x%016llx", (long long)0x70));
    NONFAILING(*(uint8_t*)0x2000000002d7 = 0x2c);
    NONFAILING(memcpy((void*)0x2000000002d8, "max_dir_size_kb", 15));
    NONFAILING(*(uint8_t*)0x2000000002e7 = 0x3d);
    NONFAILING(sprintf((char*)0x2000000002e8, "0x%016llx", (long long)0x7b1));
    NONFAILING(*(uint8_t*)0x2000000002fa = 0x2c);
    NONFAILING(memcpy((void*)0x2000000002fb, "stripe", 6));
    NONFAILING(*(uint8_t*)0x200000000301 = 0x3d);
    NONFAILING(sprintf((char*)0x200000000302, "0x%016llx", (long long)0x20));
    NONFAILING(*(uint8_t*)0x200000000314 = 0x2c);
    NONFAILING(memcpy((void*)0x200000000315, "bsdgroups", 9));
    NONFAILING(*(uint8_t*)0x20000000031e = 0x2c);
    NONFAILING(memcpy((void*)0x20000000031f, "max_batch_time", 14));
    NONFAILING(*(uint8_t*)0x20000000032d = 0x3d);
    NONFAILING(sprintf((char*)0x20000000032e, "0x%016llx", (long long)0x3fe));
    NONFAILING(*(uint8_t*)0x200000000340 = 0x2c);
    NONFAILING(memcpy((void*)0x200000000341, "user_xattr", 10));
    NONFAILING(*(uint8_t*)0x20000000034b = 0x2c);
    NONFAILING(memcpy((void*)0x20000000034c, "noinit_itable", 13));
    NONFAILING(*(uint8_t*)0x200000000359 = 0x2c);
    NONFAILING(*(uint8_t*)0x20000000035a = 0);
    NONFAILING(memcpy(
        (void*)0x200000000800,
        "\x78\x9c\xec\xdd\xcf\x6b\x1c\x65\x1f\x00\xf0\xef\x6c\x76\xfb\xfb\x7d"
        "\x9b\x42\x29\x6f\x5f\x5e\x5e\x0a\x3d\x58\xa9\xdd\x34\x89\x3f\x2a\x78"
        "\xa8\x47\xd1\x62\x41\x3d\xd7\x25\x99\x86\x92\x4d\xb7\x64\x37\xa5\x89"
        "\x05\xdb\x83\xbd\x78\x91\x22\x88\x58\x10\xef\x7a\xf7\xe0\xa1\x78\xf1"
        "\xe8\x5f\x51\xd0\x42\x91\x12\xf4\xe0\x65\x65\x36\xb3\xc9\xb6\xd9\x24"
        "\x9b\x74\x63\x62\xf7\xf3\x81\x69\x9f\x67\x66\x36\xcf\x3c\xf3\xcc\xf7"
        "\xe1\x99\x7d\x76\x98\x00\x06\xd6\x89\xec\x9f\x42\xc4\xf1\x88\xf8\x2c"
        "\x89\x38\xdc\xb1\xad\x18\xf9\xc6\x13\x4b\xfb\x2d\x3e\xbe\x39\x91\x2d"
        "\x49\x34\x9b\xef\xfd\x96\x44\x92\xaf\x6b\xef\x9f\xe4\xff\x1f\xcc\x33"
        "\xff\x89\x88\x1f\x3f\x89\x38\x5d\x58\x5d\x6e\x7d\x7e\x61\xba\x52\xad"
        "\xa6\xb3\x79\x7e\xa4\x31\x73\x6d\xa4\x3e\xbf\x70\xe6\xca\x4c\x65\x2a"
        "\x9d\x4a\xaf\x8e\x8d\x8f\x9f\x7b\x65\x7c\xec\xf5\xd7\x5e\xed\x5b\x5d"
        "\x5f\xbc\xf8\xc7\x97\xef\xde\x7f\xeb\xdc\xa7\x27\x17\xbf\xf8\xee\xe1"
        "\x91\xbb\x49\x9c\x8f\x43\xf9\xb6\xce\x7a\x3c\x83\x5b\x9d\x99\x13\xcd"
        "\x66\x7e\x4e\x4a\x71\xfe\xa9\x1d\x47\xfb\x50\xd8\x6e\x92\xec\xf4\x01"
        "\xb0\x25\x43\x79\x9c\x97\x22\xe2\x78\xe9\x70\xa9\x1d\xf5\xc0\xf3\xef"
        "\xe3\x88\x68\x02\x03\x2a\xd9\x64\xfc\xef\xd5\x5f\xc0\x73\xa2\x3d\x0e"
        "\x68\xdf\xdb\xf7\xe9\x3e\xf8\x1f\xe3\xd1\x9b\x4b\x37\x40\xab\xeb\x5f"
        "\x5c\xfa\x6e\x24\xf6\xb5\xee\x8d\x0e\x2c\x26\x4f\xdc\x19\x65\xf7\xbb"
        "\xc3\x7d\x28\x3f\x2b\xe3\xfb\x5f\xef\xdd\xcd\x96\xe8\xdf\xf7\x10\x00"
        "\x1b\xba\x75\x3b\x22\xce\x16\x8b\xab\xfb\xbf\x24\xef\xff\xb6\xee\x6c"
        "\x0f\xfb\x3c\x5d\x86\xfe\x0f\xfe\x3e\xf7\xb3\xf1\xcf\x4b\xdd\xc6\x3f"
        "\x85\xe5\xf1\x4f\x74\x19\xff\x1c\xec\x12\xbb\x5b\xb1\x71\xfc\x17\x1e"
        "\xf6\xa1\x98\x35\x65\xe3\xbf\x37\xba\x8e\x7f\x97\x27\xad\x86\x87\xf2"
        "\xdc\xbf\x5a\x63\xbe\x52\x72\xf9\x4a\x35\xcd\xfa\xb6\x7f\x47\xc4\xa9"
        "\x28\xed\xcd\xf2\xeb\xcd\xe7\x9c\x5b\x7c\xd0\x5c\x6b\x5b\xe7\xf8\x2f"
        "\x5b\xb2\xf2\xdb\x63\xc1\xfc\x38\x1e\x16\xf7\x3e\xf9\x99\xc9\x4a\xa3"
        "\xf2\x2c\x75\xee\xf4\xe8\x76\xc4\x7f\xbb\x8e\x7f\x93\xe5\xf6\x4f\xba"
        "\xb4\x7f\x76\x3e\x3e\xe8\xb1\x8c\x63\xe9\xbd\xff\xaf\xb5\x6d\xe3\xfa"
        "\x6f\xaf\xe6\x37\x11\x2f\x74\x6d\xff\x95\x19\xad\x64\xfd\xf9\xc9\x91"
        "\xd6\xf5\x30\xd2\xbe\x2a\x56\xfb\xfd\xce\xb1\x9f\xd7\x2a\xbf\x7b\xfd"
        "\x7f\xfa\x61\x1b\xaa\xda\x55\xd6\xfe\x07\xd6\xaf\xff\x70\xd2\x39\x5f"
        "\x5b\xdf\x7c\x19\x5f\xef\xfb\x33\x5d\x6b\xdb\x56\xaf\xff\x3d\xc9\xfb"
        "\xad\xf4\x9e\x7c\xdd\x8d\x4a\xa3\x31\x3b\x1a\xb1\x27\x79\x67\xf5\xfa"
        "\xb1\x95\xcf\xb6\xf3\xed\xfd\xb3\xfa\x9f\x3a\xb9\x7e\xff\xd7\xed\xfa"
        "\xdf\x1f\x11\x1f\xf6\x58\xff\x3b\x47\xbf\xfd\xdf\xd6\xeb\xbf\xbd\xb2"
        "\xfa\x4f\x6e\xaa\xfd\x37\x9f\x78\xf0\xf6\x47\x5f\xad\x55\x7e\x6f\xed"
        "\xff\x72\x2b\x75\x2a\x5f\xd3\x4b\xff\xd7\xeb\x01\x3e\xcb\xb9\x03\x00"
        "\x00\x00\x00\x00\x80\xdd\xa6\x10\x11\x87\x22\x29\x94\x63\x5f\x9e\x2e"
        "\x14\xca\xe5\xa5\xdf\x77\x1c\x8d\x03\x85\x6a\xad\xde\x38\x7d\xb9\x36"
        "\x77\x75\x32\x5a\xcf\xca\x0e\x47\xa9\xd0\x9e\xe9\x3e\xdc\xf1\x7b\x88"
        "\xd1\xfc\xf7\xb0\xed\xfc\xd8\x53\xf9\xf1\x88\x38\x12\x11\x9f\x0f\xed"
        "\x6f\xe5\xcb\x13\xb5\xea\xe4\x4e\x57\x1e\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x76\x89\x83\xcb\xcf\xff\xc7\x13\xcf"
        "\xff\x67\x7e\x19\xda\xe9\xa3\x03\xb6\x5d\x71\xe9\xfd\xdf\xc0\x00\xda"
        "\xf0\x95\xff\xfd\x78\xd3\x13\xb0\x2b\x6d\x18\xff\xc0\x73\x4b\xfc\xc3"
        "\xe0\x12\xff\x30\xb8\xc4\x3f\x0c\xa4\xd6\x14\x9f\xf8\x87\xc1\x25\xfe"
        "\x61\x70\x89\x7f\x18\x5c\xe2\x1f\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfa\xea\xe2\x85\x0b"
        "\xd9\xd2\x5c\x7c\x7c\x73\x22\xcb\x4f\x5e\x9f\x9f\x9b\xae\x5d\x3f\x33"
        "\x99\xd6\xa7\xcb\x33\x73\x13\xe5\x89\xda\xec\xb5\xf2\x54\xad\x36\x55"
        "\x4d\xcb\x13\xb5\x99\x8d\xfe\x5e\xb5\x56\xbb\x36\x3a\x16\x73\x37\x46"
        "\x1a\x69\xbd\x31\x52\x9f\x5f\xb8\x34\x53\x9b\xbb\xda\xb8\x74\x65\xa6"
        "\x32\x95\x5e\x4a\xbd\x67\x1c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x56\xab\xcf\x2f\x4c\x57\xaa\xd5\x74\xb6\x0f\x89"
        "\x52\xb5\x9a\x16\x22\xa2\x97\x9d\x23\xfa\x54\xe8\x00\x26\xb2\x76\xbb"
        "\x55\xec\xed\x3c\x6f\x4f\x22\x89\x95\x35\xc5\xdd\x72\x5a\x24\xfa\x9a"
        "\xd8\xe9\x9e\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x56\xfc\x15\x00\x00\xff\xff\xd9\x2b\x32\x1d",
        1411));
    NONFAILING(syz_mount_image(/*fs=*/0x200000000040, /*dir=*/0x200000000200,
                               /*flags=MS_POSIXACL|MS_RELATIME*/ 0x210000,
                               /*opts=*/0x200000000280, /*chdir=*/3,
                               /*size=*/0x583, /*img=*/0x200000000800));
    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 = 0x143142 (4 bytes)
    //    mode: open_mode = 0x40 (2 bytes)
    //  ]
    //  returns fd
    NONFAILING(memcpy((void*)0x200000000400, "./file1\000", 8));
    res =
        syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000400ul,
                /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_CREAT|FASYNC|0x2*/ 0x143142,
                /*mode=S_IXUSR*/ 0x40);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  pwritev2 arguments: [
    //    fd: fd (resource)
    //    vec: ptr[in, array[iovec[in, array[int8]]]] {
    //      array[iovec[in, array[int8]]] {
    //        iovec[in, array[int8]] {
    //          addr: ptr[in, buffer] {
    //            buffer: {ff} (length 0x1)
    //          }
    //          len: len = 0xabfb (8 bytes)
    //        }
    //      }
    //    }
    //    vlen: len = 0x1 (8 bytes)
    //    off_low: int32 = 0x5405 (4 bytes)
    //    off_high: int32 = 0x0 (4 bytes)
    //    flags: rwf_flags = 0x0 (8 bytes)
    //  ]
    NONFAILING(*(uint64_t*)0x200000000100 = 0x200000000080);
    NONFAILING(memset((void*)0x200000000080, 255, 1));
    NONFAILING(*(uint64_t*)0x200000000108 = 0xabfb);
    syscall(__NR_pwritev2, /*fd=*/r[0], /*vec=*/0x200000000100ul, /*vlen=*/1ul,
            /*off_low=*/0x5405, /*off_high=*/0, /*flags=*/0ul);
    break;
  case 3:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x42 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    NONFAILING(memcpy((void*)0x200000000080, "./file1\000", 8));
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul,
                  /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    //  mmap arguments: [
    //    addr: VMA[0x600000]
    //    len: len = 0x600000 (8 bytes)
    //    prot: mmap_prot = 0x27ffff7 (8 bytes)
    //    flags: mmap_flags = 0x4012011 (8 bytes)
    //    fd: fd (resource)
    //    offset: intptr = 0x0 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x600000ul,
            /*prot=PROT_GROWSUP|PROT_WRITE|PROT_READ|PROT_EXEC|0x7ffff0*/
            0x27ffff7ul,
            /*flags=MAP_UNINITIALIZED|MAP_NONBLOCK|MAP_LOCKED|MAP_FIXED|0x1*/
            0x4012011ul, /*fd=*/r[1], /*offset=*/0ul);
    break;
  case 5:
    //  ioctl$KVM_SET_SREGS arguments: [
    //    fd: fd_kvmcpu (resource)
    //    cmd: const = 0x4138ae84 (4 bytes)
    //    arg: ptr[in, kvm_sregs] {
    //      kvm_sregs {
    //        cs: kvm_segment {
    //          base: kvm_guest_addrs = 0xeeee8000 (8 bytes)
    //          limit: kvm_guest_addrs = 0xd000 (4 bytes)
    //          select: kvm_guest_selector = 0xe (2 bytes)
    //          type: int8 = 0xf1 (1 bytes)
    //          present: int8 = 0x5 (1 bytes)
    //          dpl: int8 = 0xfd (1 bytes)
    //          db: int8 = 0xd4 (1 bytes)
    //          s: int8 = 0xd4 (1 bytes)
    //          l: int8 = 0x0 (1 bytes)
    //          g: int8 = 0xd7 (1 bytes)
    //          avl: int8 = 0x7 (1 bytes)
    //          unusabl: int8 = 0x4f (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        ds: kvm_segment {
    //          base: kvm_guest_addrs = 0x5000 (8 bytes)
    //          limit: kvm_guest_addrs = 0xdddd1000 (4 bytes)
    //          select: kvm_guest_selector = 0x10 (2 bytes)
    //          type: int8 = 0xb (1 bytes)
    //          present: int8 = 0x8 (1 bytes)
    //          dpl: int8 = 0x3 (1 bytes)
    //          db: int8 = 0x6 (1 bytes)
    //          s: int8 = 0xb (1 bytes)
    //          l: int8 = 0x5 (1 bytes)
    //          g: int8 = 0xf (1 bytes)
    //          avl: int8 = 0x3 (1 bytes)
    //          unusabl: int8 = 0xc0 (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        es: kvm_segment {
    //          base: kvm_guest_addrs = 0x8080000 (8 bytes)
    //          limit: kvm_guest_addrs = 0xdddd1000 (4 bytes)
    //          select: kvm_guest_selector = 0xf (2 bytes)
    //          type: int8 = 0x1 (1 bytes)
    //          present: int8 = 0x2 (1 bytes)
    //          dpl: int8 = 0x40 (1 bytes)
    //          db: int8 = 0x3 (1 bytes)
    //          s: int8 = 0x1 (1 bytes)
    //          l: int8 = 0xd (1 bytes)
    //          g: int8 = 0x0 (1 bytes)
    //          avl: int8 = 0xc4 (1 bytes)
    //          unusabl: int8 = 0x4 (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        fs: kvm_segment {
    //          base: kvm_guest_addrs = 0x8000000 (8 bytes)
    //          limit: kvm_guest_addrs = 0x2000 (4 bytes)
    //          select: kvm_guest_selector = 0x8 (2 bytes)
    //          type: int8 = 0x4 (1 bytes)
    //          present: int8 = 0x3 (1 bytes)
    //          dpl: int8 = 0x46 (1 bytes)
    //          db: int8 = 0x5 (1 bytes)
    //          s: int8 = 0xd (1 bytes)
    //          l: int8 = 0x6 (1 bytes)
    //          g: int8 = 0x3 (1 bytes)
    //          avl: int8 = 0x8 (1 bytes)
    //          unusabl: int8 = 0x3 (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        gs: kvm_segment {
    //          base: kvm_guest_addrs = 0x100000 (8 bytes)
    //          limit: kvm_guest_addrs = 0x4000 (4 bytes)
    //          select: kvm_guest_selector = 0x4 (2 bytes)
    //          type: int8 = 0x4 (1 bytes)
    //          present: int8 = 0x3 (1 bytes)
    //          dpl: int8 = 0x9 (1 bytes)
    //          db: int8 = 0xd (1 bytes)
    //          s: int8 = 0x6 (1 bytes)
    //          l: int8 = 0x1 (1 bytes)
    //          g: int8 = 0x4 (1 bytes)
    //          avl: int8 = 0x5 (1 bytes)
    //          unusabl: int8 = 0x4b (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        ss: kvm_segment {
    //          base: kvm_guest_addrs = 0x8000000 (8 bytes)
    //          limit: kvm_guest_addrs = 0x8000000 (4 bytes)
    //          select: kvm_guest_selector = 0xe (2 bytes)
    //          type: int8 = 0x0 (1 bytes)
    //          present: int8 = 0x3 (1 bytes)
    //          dpl: int8 = 0x1 (1 bytes)
    //          db: int8 = 0x1 (1 bytes)
    //          s: int8 = 0xf7 (1 bytes)
    //          l: int8 = 0x4 (1 bytes)
    //          g: int8 = 0x90 (1 bytes)
    //          avl: int8 = 0xfb (1 bytes)
    //          unusabl: int8 = 0xfc (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        tr: kvm_segment {
    //          base: kvm_guest_addrs = 0x6000 (8 bytes)
    //          limit: kvm_guest_addrs = 0x4000 (4 bytes)
    //          select: kvm_guest_selector = 0xf (2 bytes)
    //          type: int8 = 0x4 (1 bytes)
    //          present: int8 = 0x3 (1 bytes)
    //          dpl: int8 = 0xff (1 bytes)
    //          db: int8 = 0xc (1 bytes)
    //          s: int8 = 0xb (1 bytes)
    //          l: int8 = 0x10 (1 bytes)
    //          g: int8 = 0x9 (1 bytes)
    //          avl: int8 = 0x9 (1 bytes)
    //          unusabl: int8 = 0xf8 (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        ldt: kvm_segment {
    //          base: kvm_guest_addrs = 0x8080000 (8 bytes)
    //          limit: kvm_guest_addrs = 0x8080000 (4 bytes)
    //          select: kvm_guest_selector = 0x3 (2 bytes)
    //          type: int8 = 0x5 (1 bytes)
    //          present: int8 = 0x28 (1 bytes)
    //          dpl: int8 = 0x3 (1 bytes)
    //          db: int8 = 0xa (1 bytes)
    //          s: int8 = 0x9 (1 bytes)
    //          l: int8 = 0x54 (1 bytes)
    //          g: int8 = 0x1 (1 bytes)
    //          avl: int8 = 0xbf (1 bytes)
    //          unusabl: int8 = 0x7 (1 bytes)
    //          padding: const = 0x0 (1 bytes)
    //        }
    //        gdt: kvm_dtable {
    //          base: kvm_guest_addrs = 0xeeef0000 (8 bytes)
    //          limit: int16 = 0x9 (2 bytes)
    //          pad: buffer: {00 00 00 00 00 00} (length 0x6)
    //        }
    //        idt: kvm_dtable {
    //          base: kvm_guest_addrs = 0x1000 (8 bytes)
    //          limit: int16 = 0x9 (2 bytes)
    //          pad: buffer: {00 00 00 00 00 00} (length 0x6)
    //        }
    //        cr0: kvm_x86_cr0 = 0x40010000 (8 bytes)
    //        cr2: const = 0x0 (8 bytes)
    //        cr3: kvm_guest_addrs = 0x2 (8 bytes)
    //        cr4: kvm_x86_cr4 = 0x300 (8 bytes)
    //        cr8: int64 = 0x5 (8 bytes)
    //        efer: kvm_x86_efer = 0x2000 (8 bytes)
    //        apic: kvm_guest_addrs = 0xe6e70c00 (8 bytes)
    //        intr: array[int64] {
    //          int64 = 0x3 (8 bytes)
    //          int64 = 0x401 (8 bytes)
    //          int64 = 0x7 (8 bytes)
    //          int64 = 0xc5 (8 bytes)
    //        }
    //      }
    //    }
    //  ]
    NONFAILING(*(uint64_t*)0x2000000001c0 = 0xeeee8000);
    NONFAILING(*(uint32_t*)0x2000000001c8 = 0xd000);
    NONFAILING(*(uint16_t*)0x2000000001cc = 0xe);
    NONFAILING(*(uint8_t*)0x2000000001ce = 0xf1);
    NONFAILING(*(uint8_t*)0x2000000001cf = 5);
    NONFAILING(*(uint8_t*)0x2000000001d0 = 0xfd);
    NONFAILING(*(uint8_t*)0x2000000001d1 = 0xd4);
    NONFAILING(*(uint8_t*)0x2000000001d2 = 0xd4);
    NONFAILING(*(uint8_t*)0x2000000001d3 = 0);
    NONFAILING(*(uint8_t*)0x2000000001d4 = 0xd7);
    NONFAILING(*(uint8_t*)0x2000000001d5 = 7);
    NONFAILING(*(uint8_t*)0x2000000001d6 = 0x4f);
    NONFAILING(*(uint8_t*)0x2000000001d7 = 0);
    NONFAILING(*(uint64_t*)0x2000000001d8 = 0x5000);
    NONFAILING(*(uint32_t*)0x2000000001e0 = 0xdddd1000);
    NONFAILING(*(uint16_t*)0x2000000001e4 = 0x10);
    NONFAILING(*(uint8_t*)0x2000000001e6 = 0xb);
    NONFAILING(*(uint8_t*)0x2000000001e7 = 8);
    NONFAILING(*(uint8_t*)0x2000000001e8 = 3);
    NONFAILING(*(uint8_t*)0x2000000001e9 = 6);
    NONFAILING(*(uint8_t*)0x2000000001ea = 0xb);
    NONFAILING(*(uint8_t*)0x2000000001eb = 5);
    NONFAILING(*(uint8_t*)0x2000000001ec = 0xf);
    NONFAILING(*(uint8_t*)0x2000000001ed = 3);
    NONFAILING(*(uint8_t*)0x2000000001ee = 0xc0);
    NONFAILING(*(uint8_t*)0x2000000001ef = 0);
    NONFAILING(*(uint64_t*)0x2000000001f0 = 0x8080000);
    NONFAILING(*(uint32_t*)0x2000000001f8 = 0xdddd1000);
    NONFAILING(*(uint16_t*)0x2000000001fc = 0xf);
    NONFAILING(*(uint8_t*)0x2000000001fe = 1);
    NONFAILING(*(uint8_t*)0x2000000001ff = 2);
    NONFAILING(*(uint8_t*)0x200000000200 = 0x40);
    NONFAILING(*(uint8_t*)0x200000000201 = 3);
    NONFAILING(*(uint8_t*)0x200000000202 = 1);
    NONFAILING(*(uint8_t*)0x200000000203 = 0xd);
    NONFAILING(*(uint8_t*)0x200000000204 = 0);
    NONFAILING(*(uint8_t*)0x200000000205 = 0xc4);
    NONFAILING(*(uint8_t*)0x200000000206 = 4);
    NONFAILING(*(uint8_t*)0x200000000207 = 0);
    NONFAILING(*(uint64_t*)0x200000000208 = 0x8000000);
    NONFAILING(*(uint32_t*)0x200000000210 = 0x2000);
    NONFAILING(*(uint16_t*)0x200000000214 = 8);
    NONFAILING(*(uint8_t*)0x200000000216 = 4);
    NONFAILING(*(uint8_t*)0x200000000217 = 3);
    NONFAILING(*(uint8_t*)0x200000000218 = 0x46);
    NONFAILING(*(uint8_t*)0x200000000219 = 5);
    NONFAILING(*(uint8_t*)0x20000000021a = 0xd);
    NONFAILING(*(uint8_t*)0x20000000021b = 6);
    NONFAILING(*(uint8_t*)0x20000000021c = 3);
    NONFAILING(*(uint8_t*)0x20000000021d = 8);
    NONFAILING(*(uint8_t*)0x20000000021e = 3);
    NONFAILING(*(uint8_t*)0x20000000021f = 0);
    NONFAILING(*(uint64_t*)0x200000000220 = 0x100000);
    NONFAILING(*(uint32_t*)0x200000000228 = 0x4000);
    NONFAILING(*(uint16_t*)0x20000000022c = 4);
    NONFAILING(*(uint8_t*)0x20000000022e = 4);
    NONFAILING(*(uint8_t*)0x20000000022f = 3);
    NONFAILING(*(uint8_t*)0x200000000230 = 9);
    NONFAILING(*(uint8_t*)0x200000000231 = 0xd);
    NONFAILING(*(uint8_t*)0x200000000232 = 6);
    NONFAILING(*(uint8_t*)0x200000000233 = 1);
    NONFAILING(*(uint8_t*)0x200000000234 = 4);
    NONFAILING(*(uint8_t*)0x200000000235 = 5);
    NONFAILING(*(uint8_t*)0x200000000236 = 0x4b);
    NONFAILING(*(uint8_t*)0x200000000237 = 0);
    NONFAILING(*(uint64_t*)0x200000000238 = 0x8000000);
    NONFAILING(*(uint32_t*)0x200000000240 = 0x8000000);
    NONFAILING(*(uint16_t*)0x200000000244 = 0xe);
    NONFAILING(*(uint8_t*)0x200000000246 = 0);
    NONFAILING(*(uint8_t*)0x200000000247 = 3);
    NONFAILING(*(uint8_t*)0x200000000248 = 1);
    NONFAILING(*(uint8_t*)0x200000000249 = 1);
    NONFAILING(*(uint8_t*)0x20000000024a = 0xf7);
    NONFAILING(*(uint8_t*)0x20000000024b = 4);
    NONFAILING(*(uint8_t*)0x20000000024c = 0x90);
    NONFAILING(*(uint8_t*)0x20000000024d = 0xfb);
    NONFAILING(*(uint8_t*)0x20000000024e = 0xfc);
    NONFAILING(*(uint8_t*)0x20000000024f = 0);
    NONFAILING(*(uint64_t*)0x200000000250 = 0x6000);
    NONFAILING(*(uint32_t*)0x200000000258 = 0x4000);
    NONFAILING(*(uint16_t*)0x20000000025c = 0xf);
    NONFAILING(*(uint8_t*)0x20000000025e = 4);
    NONFAILING(*(uint8_t*)0x20000000025f = 3);
    NONFAILING(*(uint8_t*)0x200000000260 = -1);
    NONFAILING(*(uint8_t*)0x200000000261 = 0xc);
    NONFAILING(*(uint8_t*)0x200000000262 = 0xb);
    NONFAILING(*(uint8_t*)0x200000000263 = 0x10);
    NONFAILING(*(uint8_t*)0x200000000264 = 9);
    NONFAILING(*(uint8_t*)0x200000000265 = 9);
    NONFAILING(*(uint8_t*)0x200000000266 = 0xf8);
    NONFAILING(*(uint8_t*)0x200000000267 = 0);
    NONFAILING(*(uint64_t*)0x200000000268 = 0x8080000);
    NONFAILING(*(uint32_t*)0x200000000270 = 0x8080000);
    NONFAILING(*(uint16_t*)0x200000000274 = 3);
    NONFAILING(*(uint8_t*)0x200000000276 = 5);
    NONFAILING(*(uint8_t*)0x200000000277 = 0x28);
    NONFAILING(*(uint8_t*)0x200000000278 = 3);
    NONFAILING(*(uint8_t*)0x200000000279 = 0xa);
    NONFAILING(*(uint8_t*)0x20000000027a = 9);
    NONFAILING(*(uint8_t*)0x20000000027b = 0x54);
    NONFAILING(*(uint8_t*)0x20000000027c = 1);
    NONFAILING(*(uint8_t*)0x20000000027d = 0xbf);
    NONFAILING(*(uint8_t*)0x20000000027e = 7);
    NONFAILING(*(uint8_t*)0x20000000027f = 0);
    NONFAILING(*(uint64_t*)0x200000000280 = 0xeeef0000);
    NONFAILING(*(uint16_t*)0x200000000288 = 9);
    NONFAILING(memset((void*)0x20000000028a, 0, 6));
    NONFAILING(*(uint64_t*)0x200000000290 = 0x1000);
    NONFAILING(*(uint16_t*)0x200000000298 = 9);
    NONFAILING(memset((void*)0x20000000029a, 0, 6));
    NONFAILING(*(uint64_t*)0x2000000002a0 = 0x40010000);
    NONFAILING(*(uint64_t*)0x2000000002a8 = 0);
    NONFAILING(*(uint64_t*)0x2000000002b0 = 2);
    NONFAILING(*(uint64_t*)0x2000000002b8 = 0x300);
    NONFAILING(*(uint64_t*)0x2000000002c0 = 5);
    NONFAILING(*(uint64_t*)0x2000000002c8 = 0x2000);
    NONFAILING(*(uint64_t*)0x2000000002d0 = 0xe6e70c00);
    NONFAILING(*(uint64_t*)0x2000000002d8 = 3);
    NONFAILING(*(uint64_t*)0x2000000002e0 = 0x401);
    NONFAILING(*(uint64_t*)0x2000000002e8 = 7);
    NONFAILING(*(uint64_t*)0x2000000002f0 = 0xc5);
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x4138ae84,
            /*arg=*/0x2000000001c0ul);
    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;
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}