// https://syzkaller.appspot.com/bug?id=b3d4ed3e41b3085ce97f4504f4183e3f99115fb2
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

#include <linux/loop.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 279
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#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 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");
  }
  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;
retry:
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void reset_loop()
{
  char buf[64];
  snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
  int loopfd = open(buf, O_RDWR);
  if (loopfd != -1) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

void execute_one(void)
{
  NONFAILING(memcpy((void*)0x20000100, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x20000500, "./file0\000", 8));
  NONFAILING(memcpy(
      (void*)0x20000a80,
      "\x78\x9c\xec\xdd\xcf\x6f\x1c\x57\x1d\x00\xf0\xef\x8c\x7f\x36\x4d\xeb\x04"
      "\x7a\x80\x0a\x48\x80\x42\x40\x51\x76\xe3\x4d\x1b\x55\xbd\xb4\xb9\x80\x50"
      "\x55\x09\x51\x71\x40\x1c\x52\x63\x6f\x2c\x93\x5d\xaf\xf1\xae\x4b\x6d\x2c"
      "\xe1\xfe\x0d\x20\x81\xc4\x09\xfe\x04\x0e\x48\x1c\x90\x7a\xe2\xc0\x8d\x23"
      "\x12\x07\x84\x54\x0e\x48\x01\x2c\x50\x8c\x04\xd2\xa2\x99\x1d\x3b\x5b\x7b"
      "\x4d\x96\xec\x7a\x97\x7a\x3f\x1f\x69\x32\xf3\xe6\xcd\xcc\xf7\xbd\x6c\x66"
      "\xdf\xdb\xb7\x9b\x79\x01\x4c\xac\xab\x11\xb1\x17\x11\xb3\x11\xf1\x56\x44"
      "\x2c\x14\xfb\x93\x62\x89\xd7\x3a\x4b\x76\xdc\xc3\xfd\xdd\xe5\x83\xfd\xdd"
      "\xe5\x24\xda\xed\x37\xff\x9a\xe4\xf9\xd9\xbe\xe8\x3a\x27\xf3\x74\x71\xcd"
      "\xf9\x88\xf8\xda\x97\x23\xbe\x95\x9c\x8c\xdb\xdc\xde\xb9\xbf\x54\xab\x55"
      "\x37\x8b\x74\xb9\x55\xdf\x28\x37\xb7\x77\x6e\xac\xd5\x97\x56\xab\xab\xd5"
      "\xf5\x4a\xe5\xf6\xe2\xed\x9b\x2f\xdf\x7a\xa9\x32\xb4\xba\x5e\xa9\xff\xfc"
      "\xc1\x97\xd6\x5e\xff\xfa\xaf\x7e\xf9\xc9\xf7\x7f\xbb\xf7\xc5\xef\x65\xc5"
      "\xba\x58\xe4\x75\xd7\x63\x98\x3a\x55\x9f\x39\x8a\x93\x99\x8e\x88\xd7\xcf"
      "\x22\xd8\x18\x4c\x15\xeb\xd9\x31\x97\x83\x27\x93\x46\xc4\x47\x22\xe2\x33"
      "\xf9\xfd\xbf\x10\x53\xf9\xbf\x4e\x00\xe0\x3c\x6b\xb7\x17\xa2\xbd\xd0\x9d"
      "\x06\x00\xce\xbb\x34\x1f\x03\x4b\xd2\x52\x44\xa4\x69\xd1\x09\x28\x75\xc6"
      "\xf0\x9e\x8b\x0b\x69\xad\xd1\x6c\x5d\xbf\xd7\xd8\x5a\x5f\xe9\x8c\x95\x5d"
      "\x8a\x99\xf4\xde\x5a\xad\x7a\xf3\xf2\xdc\xef\xbf\x93\x1f\x3c\x93\x64\xe9"
      "\xc5\x3c\x2f\xcf\xcf\xd3\x95\x63\xe9\x5b\x11\x71\x39\x22\x7e\x38\xf7\x54"
      "\x9e\x2e\x2d\x37\x6a\x2b\xe3\xe9\xf2\x00\xc0\xc4\x7b\xba\xbb\xfd\x8f\x88"
      "\x7f\xcc\xa5\x69\xa9\xd4\xd7\xa9\x3d\xbe\xd5\x03\x00\x3e\x34\xe6\xc7\x5d"
      "\x00\x00\x60\xe4\xb4\xff\x00\x30\x79\xb4\xff\x00\x30\x79\xfa\x68\xff\x8b"
      "\x2f\xfb\xf7\xce\xbc\x2c\x00\xc0\x68\xf8\xfc\x0f\x00\x93\x47\xfb\x0f\x00"
      "\x93\x47\xfb\x0f\x00\x13\xe5\xab\x6f\xbc\x91\x2d\xed\x83\xe2\xf9\xd7\x2b"
      "\x6f\x6f\x6f\xdd\x6f\xbc\x7d\x63\xa5\xda\xbc\x5f\xaa\x6f\x2d\x97\x96\x1b"
      "\x9b\x1b\xa5\xd5\x46\x63\x35\x7f\x66\x4f\xfd\x71\xd7\xab\x35\x1a\x1b\x8b"
      "\x2f\xc6\xd6\x3b\xe5\x56\xb5\xd9\x2a\x37\xb7\x77\xee\xd6\x1b\x5b\xeb\xad"
      "\xbb\xf9\x73\xbd\xef\x56\x67\x46\x52\x2b\x00\xe0\xbf\xb9\x7c\xe5\xbd\xdf"
      "\x25\x11\xb1\xf7\xca\x53\xf9\x12\x5d\x73\x39\x68\xab\xe1\x7c\x4b\xc7\x5d"
      "\x00\x60\x6c\xa6\x06\x39\x59\x07\x01\x3e\xd4\xcc\xf6\x05\x93\xab\xaf\x26"
      "\x3c\xef\x24\xfc\xe6\xcc\xcb\x02\x8c\x47\xcf\x87\x79\xcf\xf7\xdc\xfc\xa0"
      "\x1f\xff\x0f\x41\xfc\xce\x08\xfe\xaf\x5c\xfb\x78\xff\xe3\xff\xe6\x78\x86"
      "\xf3\xc5\xf8\x3f\x4c\xae\x27\x1b\xff\x7f\x75\xe8\xe5\x00\x46\xcf\xf8\x3f"
      "\x4c\xae\x76\x3b\x39\x3e\xe7\xff\xec\x51\x16\x00\x70\x2e\x0d\xf0\x13\xbe"
      "\xf6\xf7\x87\xd5\x09\x01\xc6\xea\x71\x93\x79\x0f\xe5\xfb\x7f\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x38\x67\x2e\x46\xc4\xb7\x23\x49\x4b\xf9\x5c\xe0\x69\xf6\x67"
      "\x5a\x2a\x45\x3c\x13\x11\x97\x62\x26\xb9\xb7\x56\xab\xde\x8c\x88\x67\xe3"
      "\x4a\x44\xcc\xcc\x65\xe9\xc5\x71\x17\x1a\x00\x18\x50\xfa\xe7\xa4\x98\xff"
      "\xeb\xda\xc2\x0b\x17\x8f\xe7\xce\x26\xff\x9c\xcb\xd7\x11\xf1\xdd\x9f\xbc"
      "\xf9\xa3\x77\x96\x5a\xad\xcd\xc5\x6c\xff\xdf\x8e\xf6\xcf\x1d\x4e\x1f\x56"
      "\x79\x74\xde\x00\xf3\x0a\x02\x00\x43\x96\xb7\xdf\x95\x62\xdd\xf5\x41\xfe"
      "\xe1\xfe\xee\xf2\xe1\x32\xca\xf2\x3c\xb8\x13\xff\x2e\xa6\x22\x5e\x3e\xd8"
      "\xdf\xcd\x97\x4e\xce\x74\x64\x3b\x23\xe6\xf3\xbe\xc4\x85\xbf\x27\x31\x5d"
      "\x9c\x33\x1f\x11\xcf\x47\xc4\xd4\x10\xe2\xef\xbd\x1b\x11\x1f\xeb\x55\xff"
      "\x24\x1f\x1b\xb9\x54\xcc\x7c\xda\x1d\x3f\x8a\xd8\xcf\x8c\x34\x7e\xfa\x81"
      "\xf8\x69\x9e\xd7\x59\x67\x9d\xaf\x8f\x0e\xa1\x2c\x30\x69\xde\xbb\x13\x11"
      "\xaf\xf5\xba\xff\xd2\xb8\x9a\xaf\x7b\xdf\xff\xf3\xf9\x3b\xd4\xe0\x1e\xdc"
      "\xe9\x5c\xec\xf0\xbd\xef\xa0\x2b\xfe\x74\x11\x69\xaa\x47\xfc\xec\x9e\xbf"
      "\xda\x6f\x8c\x17\x7f\xfd\x95\x13\x3b\xdb\x0b\x9d\xbc\x77\x23\x9e\x9f\xee"
      "\x15\x3f\x39\x8a\x9f\x9c\x12\xff\x85\x3e\xe3\xff\xe1\x13\x9f\xfa\xc1\xab"
      "\xa7\xe4\xb5\x7f\x1a\x71\x2d\x7a\xc7\xef\x8e\x55\x6e\xd5\x37\xca\xcd\xed"
      "\x9d\x1b\x6b\xf5\xa5\xd5\xea\x6a\x75\xbd\x52\xb9\xbd\x78\xfb\xe6\xcb\xb7"
      "\x5e\xaa\x94\xf3\x31\xea\xf2\xe1\x48\xf5\x49\x7f\x79\xe5\xfa\xb3\xa7\x95"
      "\x2d\xab\xff\x85\x53\xe2\xcf\xf7\xac\xff\xec\xd1\xb9\x9f\xeb\xb3\xfe\x3f"
      "\xfb\xd7\x5b\xdf\xfc\xf4\xa3\xe4\xdc\xf1\xf8\x5f\xf8\x6c\xef\xd7\xff\xb9"
      "\x9e\xf1\x3b\xb2\x36\xf1\xf3\x7d\xc6\x5f\xba\xf0\x8b\x53\xa7\xef\xce\xe2"
      "\xaf\x9c\x52\xff\xc7\xbd\xfe\xd7\xfb\x8c\xff\xfe\x9f\x76\x56\xfa\x3c\x14"
      "\x00\x18\x81\xe6\xf6\xce\xfd\xa5\x5a\xad\xba\x39\xd0\x46\xf6\x29\x74\x18"
      "\xd7\x39\xb1\x91\x15\xb1\xbf\x83\x0f\xbb\x8b\x83\x05\xfd\x63\x9c\x45\x2d"
      "\x9e\x70\x63\xe6\xac\xfe\x56\xcf\x7c\x63\xfa\xa8\xaf\x38\xdc\x2b\x7f\x23"
      "\xbb\xe2\x88\xab\x93\x0e\xbd\x16\x03\x6d\x3c\x1c\x55\xac\xf1\xbd\x27\x01"
      "\xa3\xf1\xe8\xa6\x1f\x77\x49\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x80\xd3\x8c\xe2\xbf\x2e\x8d\xbb\x8e\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9c\x5f\xff"
      "\x09\x00\x00\xff\xff\xb3\x8b\xcc\xe8",
      1341));
  NONFAILING(syz_mount_image(
      /*fs=*/0x20000100, /*dir=*/0x20000500,
      /*flags=MS_LAZYTIME|MS_SILENT|MS_NOSUID*/ 0x2008002, /*opts=*/0x20000080,
      /*chdir=*/1, /*size=*/0x53d, /*img=*/0x20000a80));
  NONFAILING(memcpy((void*)0x20000140, "vfat\000", 5));
  NONFAILING(
      memcpy((void*)0x20000040,
             "\023\023w\305\3745\324\024T\325\324\035)\255\032`)"
             "Y\201F\346\276\026nA\255\r\275@T\003<\2373\273\332\202$"
             "\242\363\327r\347cnH\263<\277p\203r\350\361\271\223>"
             "\305\022wC\276\"\006 \236\360-\371\313\362\366\350\200\3238/\000",
             78));
  NONFAILING(syz_mount_image(
      /*fs=*/0x20000140, /*dir=*/0x20000040,
      /*flags=MS_LAZYTIME|MS_UNBINDABLE|MS_SYNCHRONOUS|MS_SILENT|MS_RDONLY|MS_NOSUID|0x1c08*/
      0x2029c1b, /*opts=*/0, /*chdir=*/0xfc, /*size=*/0, /*img=*/0x200000c0));
  NONFAILING(memcpy((void*)0x20000040, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x20000500, "./file0\000", 8));
  NONFAILING(*(uint8_t*)0x20000280 = 0);
  NONFAILING(memcpy(
      (void*)0x20000a00,
      "\x78\x9c\xec\xdd\xcf\x6f\x1b\x59\x1d\x00\xf0\xef\x4c\xe2\xd2\x1f\x29\x49"
      "\x81\x43\xa9\x44\xa9\x68\x51\x5a\x41\xed\xa4\xa1\x6d\xc4\xa1\x14\x09\xd1"
      "\x53\x25\xa0\xdc\x4b\x48\x9c\x28\x8a\x13\x47\xb1\xd3\x36\x51\x05\xa9\xf8"
      "\x03\x90\x10\x02\x24\x4e\x9c\xb8\x20\xf1\x07\x20\xa1\xfe\x09\x08\xa9\x12"
      "\xdc\x11\x20\xd0\x6a\xb7\xdd\x3d\xec\x61\xb7\x5e\xd9\x1e\xf7\x47\xd6\x4e"
      "\x52\xad\x93\xa9\xe2\xcf\x47\x7a\x99\x37\x33\xb6\xbf\xdf\x17\xcb\xcf\xf3"
      "\x66\x9e\x3c\x01\x0c\xac\x73\x11\x71\x33\x22\x9e\x37\x1a\x8d\x4b\x11\x31"
      "\x9a\x6d\x4f\xb3\x12\x5b\xed\xd2\x7c\xdc\xb3\xa7\x0f\x67\x9b\x25\x89\x46"
      "\xe3\xce\xbb\x49\x24\xd9\xb6\xce\x6b\x25\xd9\xf2\x44\xf6\xb4\xa3\x11\xf1"
      "\xa3\x5b\x11\x3f\x4d\x3e\x1d\xb7\xb6\xb1\xb9\x34\x53\xa9\x94\xd7\xb2\xf5"
      "\x52\x7d\x79\xb5\x54\xdb\xd8\xbc\xbc\xb8\x3c\xb3\x50\x5e\x28\xaf\x4c\x4d"
      "\x4d\x5e\x9b\xbe\x3e\x7d\x75\x7a\xa2\x2f\xed\x6c\xe6\x74\xe3\x7b\xff\xfd"
      "\xcd\x2f\xff\xf8\xfd\x1b\x7f\xfd\xe6\xfd\x7f\xdd\xfd\xff\xc5\x9f\x35\xd3"
      "\x1a\xc9\xf6\xbf\xda\x8e\x7e\x6a\x37\xbd\xd0\xfa\x5f\x74\x0c\x47\xc4\xda"
      "\x7e\x04\xcb\xc1\x50\xd6\x9e\x42\xde\x89\x00\x00\xb0\x27\xcd\x63\xfc\x2f"
      "\x44\xc4\xd7\x22\xe2\x52\x8c\xc6\x50\xeb\x68\x0e\x00\x00\x00\x38\x4c\x1a"
      "\xdf\x19\x89\x8f\x92\x88\x06\x00\x00\x00\x70\x68\xa5\xad\x39\xb0\x49\x5a"
      "\xcc\xe6\x02\x8c\x44\x9a\x16\x8b\xed\xf9\xb2\x5f\x8a\xe3\x69\xa5\x5a\xab"
      "\x7f\x63\xbe\xba\xbe\x32\xd7\x9e\x2b\x3b\x16\x85\x74\x7e\xb1\x52\x9e\xc8"
      "\xe6\x0a\x8f\x45\x21\x69\xae\x4f\xb6\xea\x2f\xd7\xaf\x6c\x5b\x9f\x8a\x88"
      "\x53\x11\xf1\xeb\xd1\x63\xad\xf5\xe2\x6c\xb5\x32\x97\xf7\xc9\x0f\x00\x00"
      "\x00\x18\x10\x27\xb6\x8d\xff\x3f\x18\x6d\x8f\xff\x01\x00\x00\x80\x43\x66"
      "\x2c\xef\x04\x00\x00\x00\x80\x7d\x67\xfc\x0f\x00\x00\x00\x87\x9f\xf1\x3f"
      "\x00\x00\x00\x1c\x6a\x3f\xb8\x7d\xbb\x59\x1a\x9d\xfb\x5f\xcf\xdd\xdb\x58"
      "\x5f\xaa\xde\xbb\x3c\x57\xae\x2d\x15\x97\xd7\x67\x8b\xb3\xd5\xb5\xd5\xe2"
      "\x42\xb5\xba\xd0\xfa\xcd\xbe\xe5\xdd\x5e\xaf\x52\xad\xae\x7e\x2b\x56\xd6"
      "\x1f\x94\xea\xe5\x5a\xbd\x54\xdb\xd8\xbc\xbb\x5c\x5d\x5f\xa9\xdf\x5d\x7c"
      "\xed\x16\xd8\x00\x00\x00\xc0\x01\x3a\xf5\xd5\xc7\xff\x4c\x22\x62\xeb\xdb"
      "\xc7\x5a\xa5\xe9\x48\xde\x49\x01\x07\xe2\xd6\x9b\x3c\xf8\x3f\xfb\x97\x07"
      "\x70\xf0\x86\xf2\x4e\x00\xc8\xcd\x70\xde\x09\x00\xb9\x29\xe4\x9d\x00\x90"
      "\xbb\x64\x97\xfd\x3d\x27\xef\xfc\xad\xff\xb9\x00\x00\x00\xfb\x63\xfc\xcb"
      "\xbd\xaf\xff\xef\x7c\x6e\x60\x2b\x3d\x80\xf4\x80\x7d\xe4\x43\x0c\x83\xcb"
      "\xf5\x7f\x18\x5c\xae\xff\xc3\xe0\x2a\x38\x02\x80\x81\xb7\xff\xd7\xff\x1b"
      "\x8d\x37\x4a\x08\x00\x00\xe8\xbb\x91\x56\x49\xd2\x62\x76\x2d\x70\x24\xd2"
      "\xb4\x58\x8c\x38\xd9\xba\x2d\x40\x21\x99\x5f\xac\x94\x27\x22\xe2\xf3\x11"
      "\xf1\x8f\xd1\xc2\xe7\x9a\xeb\x93\xad\x67\x26\xbb\x8e\x19\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xb6\x46"
      "\x23\x89\x06\x00\x00\x00\x70\xa8\x45\xa4\xff\x4b\xb2\xfb\x7f\x8d\x8f\x5e"
      "\x18\xd9\x7e\x7e\xe0\x48\xf2\xe1\x68\x6b\x19\x11\xf7\x7f\x7f\xe7\xb7\x0f"
      "\x66\xea\xf5\xb5\xc9\xe6\xf6\xf7\x5e\x6c\xaf\xff\x2e\xdb\x7e\x25\x8f\x33"
      "\x18\x00\x00\x00\xc0\x76\x9d\x71\x7a\x67\x1c\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\x00\x00\x00\x00\x00\xfd\xf4\xec\xe9\xc3"
      "\xd9\x4e\x39\xc8\xb8\xef\x7c\x37\x22\xc6\xba\xc5\x1f\x8e\xa3\xad\xe5\xd1"
      "\x28\x44\xc4\xf1\xf7\x93\x18\x7e\xe5\x79\x49\x44\x0c\xf5\x21\xfe\xd6\xa3"
      "\x88\x38\xdd\x2d\x7e\xd2\x4c\x2b\xc6\xb2\x2c\xba\xc5\x3f\x96\x63\xfc\x34"
      "\x22\x4e\xf4\x21\x3e\x0c\xb2\xc7\xcd\xfe\xe7\x66\xb7\xcf\x5f\x1a\xe7\x5a"
      "\xcb\xee\x9f\xbf\xe1\xac\x7c\x56\xbd\xfb\xbf\xf4\x45\xff\x37\xd4\xa3\xff"
      "\x39\xb9\xc7\x18\x67\x9e\xfc\xb9\xd4\x33\xfe\xa3\x88\x33\xc3\xdd\xfb\x9f"
      "\x4e\xfc\xa4\x47\xfc\xf3\x7b\x8c\xff\x93\x1f\x6f\x6e\xf6\xda\xd7\xf8\x43"
      "\xc4\x78\xd7\xef\x9f\xe4\xb5\x58\xa5\xfa\xf2\x6a\xa9\xb6\xb1\x79\x79\x71"
      "\x79\x66\xa1\xbc\x50\x5e\x99\x9a\x9a\xbc\x36\x7d\x7d\xfa\xea\xf4\x44\x69"
      "\x7e\xb1\x52\xce\xfe\x76\x8d\xf1\xab\xaf\xfc\xe5\xf9\x4e\xed\x3f\xde\x23"
      "\xfe\xd8\x2e\xed\xbf\xb0\xc7\xf6\x7f\xfc\xe4\xc1\xd3\x2f\xb6\xab\x85\x6e"
      "\xf1\x2f\x9e\xef\xfe\xfe\x9f\xee\x11\x3f\xcd\xbe\xfb\xbe\x9e\xd5\x9b\xfb"
      "\xc7\x3b\xf5\xad\x76\xfd\x55\x67\xff\xf4\xf7\xb3\x3b\xb5\x7f\xae\x47\xfb"
      "\x77\x7b\xff\x2f\xee\xb1\xfd\x97\x7e\xf8\x8b\x7f\xef\xf1\xa1\x00\xc0\x01"
      "\xa8\x6d\x6c\x2e\xcd\x54\x2a\xe5\x35\x15\x95\x81\xab\xfc\xfc\xed\x48\xe3"
      "\xad\xac\xe4\xdd\x33\x01\x00\x00\xfd\xf6\xf2\xa0\x3f\xef\x4c\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x60\x70\x1d\xc4\xcf\x89"
      "\x6d\x8f\xb9\x95\x4f\x53\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x76\xf4\x49\x00\x00\x00\xff"
      "\xff\x7c\x1b\xd9\xe3",
      1211));
  NONFAILING(syz_mount_image(
      /*fs=*/0x20000040, /*dir=*/0x20000500,
      /*flags=MS_REC|MS_SILENT|MS_RDONLY|MS_NODIRATIME|0x100*/ 0xc901,
      /*opts=*/0x20000280, /*chdir=*/1, /*size=*/0x4bb, /*img=*/0x20000a00));
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}