// https://syzkaller.appspot.com/bug?id=82d42d63041af807396903be5a8cde141b51113c
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

#include <linux/capability.h>
#include <linux/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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

#define MAX_FDS 30

//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:

//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty.  In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//%    claim that you wrote the original software. If you use this software
//%    in a product, an acknowledgment in the product documentation would be
//%    appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//%    misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler    madler@alumni.caltech.edu

//% BEGIN CODE DERIVED FROM puff.{c,h}

#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288

struct puff_state {
  unsigned char* out;
  unsigned long outlen;
  unsigned long outcnt;
  const unsigned char* in;
  unsigned long inlen;
  unsigned long incnt;
  int bitbuf;
  int bitcnt;
  jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
  long val = s->bitbuf;
  while (s->bitcnt < need) {
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    val |= (long)(s->in[s->incnt++]) << s->bitcnt;
    s->bitcnt += 8;
  }
  s->bitbuf = (int)(val >> need);
  s->bitcnt -= need;
  return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
  s->bitbuf = 0;
  s->bitcnt = 0;
  if (s->incnt + 4 > s->inlen)
    return 2;
  unsigned len = s->in[s->incnt++];
  len |= s->in[s->incnt++] << 8;
  if (s->in[s->incnt++] != (~len & 0xff) ||
      s->in[s->incnt++] != ((~len >> 8) & 0xff))
    return -2;
  if (s->incnt + len > s->inlen)
    return 2;
  if (s->outcnt + len > s->outlen)
    return 1;
  for (; len--; s->outcnt++, s->incnt++) {
    if (s->in[s->incnt])
      s->out[s->outcnt] = s->in[s->incnt];
  }
  return 0;
}
struct puff_huffman {
  short* count;
  short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
  int first = 0;
  int index = 0;
  int bitbuf = s->bitbuf;
  int left = s->bitcnt;
  int code = first = index = 0;
  int len = 1;
  short* next = h->count + 1;
  while (1) {
    while (left--) {
      code |= bitbuf & 1;
      bitbuf >>= 1;
      int count = *next++;
      if (code - count < first) {
        s->bitbuf = bitbuf;
        s->bitcnt = (s->bitcnt - len) & 7;
        return h->symbol[index + (code - first)];
      }
      index += count;
      first += count;
      first <<= 1;
      code <<= 1;
      len++;
    }
    left = (MAXBITS + 1) - len;
    if (left == 0)
      break;
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    bitbuf = s->in[s->incnt++];
    if (left > 8)
      left = 8;
  }
  return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
  int len;
  for (len = 0; len <= MAXBITS; len++)
    h->count[len] = 0;
  int symbol;
  for (symbol = 0; symbol < n; symbol++)
    (h->count[length[symbol]])++;
  if (h->count[0] == n)
    return 0;
  int left = 1;
  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= h->count[len];
    if (left < 0)
      return left;
  }
  short offs[MAXBITS + 1];
  offs[1] = 0;
  for (len = 1; len < MAXBITS; len++)
    offs[len + 1] = offs[len] + h->count[len];
  for (symbol = 0; symbol < n; symbol++)
    if (length[symbol] != 0)
      h->symbol[offs[length[symbol]]++] = symbol;
  return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
                      const struct puff_huffman* distcode)
{
  static const short lens[29] = {3,  4,  5,  6,   7,   8,   9,   10,  11, 13,
                                 15, 17, 19, 23,  27,  31,  35,  43,  51, 59,
                                 67, 83, 99, 115, 131, 163, 195, 227, 258};
  static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
                                 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
  static const short dists[30] = {
      1,    2,    3,    4,    5,    7,    9,    13,    17,    25,
      33,   49,   65,   97,   129,  193,  257,  385,   513,   769,
      1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
  static const short dext[30] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
                                 4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
                                 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
  int symbol;
  do {
    symbol = puff_decode(s, lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 256) {
      if (s->outcnt == s->outlen)
        return 1;
      if (symbol)
        s->out[s->outcnt] = symbol;
      s->outcnt++;
    } else if (symbol > 256) {
      symbol -= 257;
      if (symbol >= 29)
        return -10;
      int len = lens[symbol] + puff_bits(s, lext[symbol]);
      symbol = puff_decode(s, distcode);
      if (symbol < 0)
        return symbol;
      unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
      if (dist > s->outcnt)
        return -11;
      if (s->outcnt + len > s->outlen)
        return 1;
      while (len--) {
        if (dist <= s->outcnt && s->out[s->outcnt - dist])
          s->out[s->outcnt] = s->out[s->outcnt - dist];
        s->outcnt++;
      }
    }
  } while (symbol != 256);
  return 0;
}
static int puff_fixed(struct puff_state* s)
{
  static int virgin = 1;
  static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
  static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  static struct puff_huffman lencode, distcode;
  if (virgin) {
    lencode.count = lencnt;
    lencode.symbol = lensym;
    distcode.count = distcnt;
    distcode.symbol = distsym;
    short lengths[FIXLCODES];
    int symbol;
    for (symbol = 0; symbol < 144; symbol++)
      lengths[symbol] = 8;
    for (; symbol < 256; symbol++)
      lengths[symbol] = 9;
    for (; symbol < 280; symbol++)
      lengths[symbol] = 7;
    for (; symbol < FIXLCODES; symbol++)
      lengths[symbol] = 8;
    puff_construct(&lencode, lengths, FIXLCODES);
    for (symbol = 0; symbol < MAXDCODES; symbol++)
      lengths[symbol] = 5;
    puff_construct(&distcode, lengths, MAXDCODES);
    virgin = 0;
  }
  return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
  static const short order[19] = {16, 17, 18, 0, 8,  7, 9,  6, 10, 5,
                                  11, 4,  12, 3, 13, 2, 14, 1, 15};
  int nlen = puff_bits(s, 5) + 257;
  int ndist = puff_bits(s, 5) + 1;
  int ncode = puff_bits(s, 4) + 4;
  if (nlen > MAXLCODES || ndist > MAXDCODES)
    return -3;
  short lengths[MAXCODES];
  int index;
  for (index = 0; index < ncode; index++)
    lengths[order[index]] = puff_bits(s, 3);
  for (; index < 19; index++)
    lengths[order[index]] = 0;
  short lencnt[MAXBITS + 1], lensym[MAXLCODES];
  struct puff_huffman lencode = {lencnt, lensym};
  int err = puff_construct(&lencode, lengths, 19);
  if (err != 0)
    return -4;
  index = 0;
  while (index < nlen + ndist) {
    int symbol;
    int len;
    symbol = puff_decode(s, &lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 16)
      lengths[index++] = symbol;
    else {
      len = 0;
      if (symbol == 16) {
        if (index == 0)
          return -5;
        len = lengths[index - 1];
        symbol = 3 + puff_bits(s, 2);
      } else if (symbol == 17)
        symbol = 3 + puff_bits(s, 3);
      else
        symbol = 11 + puff_bits(s, 7);
      if (index + symbol > nlen + ndist)
        return -6;
      while (symbol--)
        lengths[index++] = len;
    }
  }
  if (lengths[256] == 0)
    return -9;
  err = puff_construct(&lencode, lengths, nlen);
  if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
    return -7;
  short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  struct puff_huffman distcode = {distcnt, distsym};
  err = puff_construct(&distcode, lengths + nlen, ndist);
  if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
    return -8;
  return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
                const unsigned char* source, unsigned long sourcelen)
{
  struct puff_state s = {
      .out = dest,
      .outlen = *destlen,
      .outcnt = 0,
      .in = source,
      .inlen = sourcelen,
      .incnt = 0,
      .bitbuf = 0,
      .bitcnt = 0,
  };
  int err;
  if (setjmp(s.env) != 0)
    err = 2;
  else {
    int last;
    do {
      last = puff_bits(&s, 1);
      int type = puff_bits(&s, 2);
      err = type == 0 ? puff_stored(&s)
                      : (type == 1 ? puff_fixed(&s)
                                   : (type == 2 ? puff_dynamic(&s) : -1));
      if (err != 0)
        break;
    } while (!last);
  }
  *destlen = s.outcnt;
  return err;
}

//% END CODE DERIVED FROM puff.{c,h}

#define ZLIB_HEADER_WIDTH 2

static int puff_zlib_to_file(const unsigned char* source,
                             unsigned long sourcelen, int dest_fd)
{
  if (sourcelen < ZLIB_HEADER_WIDTH)
    return 0;
  source += ZLIB_HEADER_WIDTH;
  sourcelen -= ZLIB_HEADER_WIDTH;
  const unsigned long max_destlen = 132 << 20;
  void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
                   MAP_PRIVATE | MAP_ANON, -1, 0);
  if (ret == MAP_FAILED)
    return -1;
  unsigned char* dest = (unsigned char*)ret;
  unsigned long destlen = max_destlen;
  int err = puff(dest, &destlen, source, sourcelen);
  if (err) {
    munmap(dest, max_destlen);
    errno = -err;
    return -1;
  }
  if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
    munmap(dest, max_destlen);
    return -1;
  }
  return munmap(dest, max_destlen);
}

static int setup_loop_device(unsigned char* data, unsigned long size,
                             const char* loopname, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (puff_zlib_to_file(data, size, memfd)) {
    err = errno;
    goto error_close_memfd;
  }
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  close(memfd);
  *loopfd_p = loopfd;
  return 0;

error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return -1;
}

static void reset_loop_device(const char* loopname)
{
  int loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    return;
  }
  if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
  }
  close(loopfd);
}

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device)
    reset_loop_device(loopname);
  errno = err;
  return res;
}

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

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

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

static void loop();

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

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

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

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

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");
}

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

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      close_fds();
      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;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  memcpy((void*)0x20000040, "hfs\000", 4);
  memcpy((void*)0x20000100,
         "\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);
  memcpy((void*)0x20000080,
         "\x71\x75\x69\x65\x74\x2c\x63\x72\x65\x61\x74\x6f\x72\x3d\xd4\x67\x5f"
         "\x16\x2c\x69\x6f\x63\x68\x61\x72\x73\x65\x74\x3d\x63\x70\x37\x37\x35"
         "\x2c\x63\x6f\x64\x65\x70\x61\x67\x65\x3d\x6d\x61\x63\x67\x61\x65\x6c"
         "\x69\x63\x2c\x74\x79\x70\x65\x3d\xb1\x19\x63\xb0\x2c\x00\xb6\x79\xbe"
         "\xd5\x39\x7f\xaa\x62\x4a\xe3\x35\x4a\xa8\xcf\x32\x12\x81\xef\xb9\x84"
         "\x91\x4b\xc9\x59\x28\x70\x76\x26\xbe\xd9\x50\x70\xe1\x3f\x5a\x28\xa1"
         "\xe5\xd0\x19\xc7\x01\xdb",
         108);
  memcpy(
      (void*)0x20000180,
      "\x78\x9c\xec\xdd\xcd\x6a\x13\x5d\x1c\xc7\xf1\xdf\x99\xa4\x6d\x9e\xa7\xa5"
      "\x4e\x5f\x44\x70\x23\x54\x0b\xba\x11\xad\x1b\x71\x13\x91\x5c\x84\x2b\x51"
      "\x9b\x08\xc5\x50\x51\x2b\xbe\xac\xaa\xb8\x12\xd1\xbd\xfb\xde\x82\x4b\x2f"
      "\xc0\x8d\xe2\x0d\xd4\x95\x2b\x2f\xa0\xba\x19\x39\x67\x26\x99\x24\xf3\xda"
      "\xd2\x66\x1a\xfd\x7e\xa0\xe1\x24\x73\xce\x9c\xff\xc9\xbc\x9c\xf3\x0f\x94"
      "\x11\x80\x7f\xd6\x8d\xd6\xee\xce\x95\x1f\xf6\xcf\x48\x35\xd5\xa4\x37\xd7"
      "\x24\x4f\x52\x43\xaa\x4b\x3a\xa9\x53\x8d\x27\x9b\x5b\x1b\x5b\xdd\x4e\x3b"
      "\x6f\x47\x35\xd7\xc2\xfe\x19\x85\x2d\x4d\xa2\xce\xfa\x66\x27\xad\xa9\x6d"
      "\xe7\x5a\x44\x7c\xfb\xae\xae\xb9\xc1\xcf\x70\x34\x82\x20\xb8\xfe\xbd\xea"
      "\x20\x50\x39\x77\xf5\xa7\xf0\xa4\x99\xe8\xea\x74\xdb\x1b\x63\x8f\x2c\xdf"
      "\xcb\x03\xb6\xdb\x3e\xe4\x38\x26\x8d\xd9\xd3\x9e\x9e\x69\xbe\xea\x38\x00"
      "\x00\xd5\x8a\xe6\x7f\x2f\x9a\xe7\xe7\xa2\xf5\xbb\xe7\x49\xab\xd1\xb4\x7f"
      "\x2c\xe7\xff\x42\x19\x13\xfd\xde\xb8\xe3\x18\xbb\x20\x77\xeb\xc0\xfc\xef"
      "\xb2\xac\xc0\xd8\xe3\x7b\xc2\x6d\x8a\xf3\x3d\x97\xc2\xd9\xed\x5e\x2f\x4b"
      "\x2c\xd3\xf3\xd4\xc8\xfb\x69\x85\x67\xd6\xd0\x02\xd3\x14\x65\x95\x2e\x16"
      "\xef\xbf\x7b\x1b\xdd\xce\xc5\xf5\x07\xdd\xb6\xa7\x57\x6a\x46\x06\xaa\x2d"
      "\xbb\xd7\x76\x78\xea\xf6\x14\x44\xbb\x92\x92\x9b\xe6\x28\x31\x76\x93\x7e"
      "\xa2\xcd\xba\x31\x4c\xd9\x31\xac\x85\xf1\x3f\x95\x34\x14\xff\xd2\x01\x7b"
      "\x3c\x30\xf3\xd9\x7c\x35\xb7\x8c\xaf\x0f\x6a\xf7\xd7\x7f\xf5\xc0\xd8\xc3"
      "\xe4\x8e\x94\x3f\x72\xa4\xc2\xf8\x2f\x65\xef\xd1\x8d\xd2\xb7\xb5\x14\xdd"
      "\x36\x9a\xcd\xa6\x37\x54\x65\xc1\x75\x72\x3a\xea\x21\xb2\xbb\xf3\x49\x39"
      "\xa3\x6c\xa4\x67\x24\xea\x9d\x51\x0b\x1a\xfe\x81\xc0\x2f\x8a\xd3\xb5\x5a"
      "\x1c\x69\x15\x8e\xee\x72\x41\xab\xa5\xd4\x56\x6b\xbd\x77\x19\xad\x96\x87"
      "\x5a\xd9\xd1\xf4\xcf\xe6\xec\xfe\x8e\x9a\x79\x67\x6e\x9a\x15\xfd\xd4\x47"
      "\xb5\x06\xd6\xff\x9e\x8d\x6f\x55\xb9\x57\x66\x7c\xd5\x98\xd5\x70\x2a\x70"
      "\xdf\x78\x38\x9e\xe9\xf4\xee\xea\x6e\x9f\x7e\x62\xe6\x48\x5e\x2e\xfd\x6f"
      "\x71\x26\x2b\xf4\x5f\xf9\xf7\x34\xec\xc3\x5b\xdd\xd5\x55\xcd\x3f\x7e\xfe"
      "\xe2\x7e\xad\xdb\xed\x3c\xb2\x85\x3b\x29\x85\x87\x73\xfd\x4f\xa6\x5e\x4b"
      "\xa9\x75\x2a\x2e\x68\x3b\xfe\x64\x46\x81\x93\xa8\xdc\x9b\x94\x4a\xee\xf9"
      "\x77\x90\xb1\x9f\xfd\x14\x2e\x1c\xea\x48\xed\xfd\xa3\xb0\xb2\xbd\xca\x8e"
      "\xc5\x41\xf9\xab\x0b\xad\x2f\xa5\x4f\xa4\x89\x2d\x54\x7c\x7f\xc2\x58\xc4"
      "\x07\xbd\xea\x48\x50\x11\xbb\xee\x32\x61\xfe\x17\xe7\x2b\xf5\x70\xb1\x67"
      "\x5f\xfc\xd4\x6c\xa4\xe4\x0f\x01\xd1\x1e\x03\xbb\xc6\xee\x67\x70\x71\xdb"
      "\x40\x3a\xb3\xe8\x4a\xff\xef\x2b\x83\x9b\xcd\xce\xe0\x92\x39\x57\x22\x67"
      "\x74\x39\xd7\xd9\xf3\xd2\xb9\xf2\x3d\xfa\x5a\x2c\x31\xdc\x89\x61\x5a\xfa"
      "\xa6\xdb\xfc\xfe\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x30\x69\xc6\xf1\xef\x04\x55\x8f\x11\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x80\x49\xd7\x7f\xfe\xaf\x7a\xcf\xff\x55"
      "\xb9\xe7\xff\x8e\x3e\x8a\xe5\x30\x9f\xff\xfb\x7e\x53\x3c\xff\x17\x38\x7a"
      "\x7f\x02\x00\x00\xff\xff\x22\x5a\x81\x87",
      712);
  res = -1;
  res = syz_mount_image(
      /*fs=*/0x20000040, /*dir=*/0x20000100,
      /*flags=MS_LAZYTIME|MS_REC|MS_STRICTATIME|MS_RDONLY|MS_MANDLOCK*/
      0x3004041, /*opts=*/0x20000080, /*chdir=*/0x11, /*size=*/0x2c8,
      /*img=*/0x20000180);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000180, "msdos\000", 6);
  memcpy((void*)0x20000100, ".\000", 2);
  *(uint32_t*)0x200007c0 = -1;
  *(uint8_t*)0x200007c4 = r[0];
  *(uint8_t*)0x200007c5 = -1;
  memcpy(
      (void*)0x200007c6,
      "\xf1\xbc\xca\x05\xed\x58\x8d\x63\xa5\x76\xcc\x3a\xfd\x51\xba\xf2\x9c\xde"
      "\x22\x81\xa8\x43\x92\xf4\xe6\x6f\xf7\xf7\x7d\xaa\x9a\xf7\x27\xce\xae\x8a"
      "\x8e\xc9\x5f\xc1\xb7\x30\x83\xde\x2d\xe8\x25\xa0\xce\x27\xc1\x6b\xc2\x3b"
      "\x2f\x7c\x7f\xb7\x25\x85\x54\x89\x39\x69\x8f\x28\x3e\x00\x00\x00\x25\x5a"
      "\x9a\x92\x40\x08\xf8\x47\x7e\x82\xba\x11\xcd\xb1\x1e\xfd\x5c\xa2\xf1\xab"
      "\x04\x9c\xe2\xcc\xc4\x15\xd2\xda\xf8\xda\xc7\x25\x53\x3a\x55\x8d\x56\x16"
      "\x54\xfa\xf5\xe0\x92\x4f\x13\x76\x17\x4f\x37\x4d\x66\x4f\xad\x4a\x6a\xb2"
      "\x4e\xc0\xe8\x22\xe7\xf9\x42\x6e\x8e\x5d\xe1\xfe\x58\x08\x5a\x0a\xe8\x6f"
      "\xd0\x2a\x11\x8b\x93\x65\x96\x18\x34\xd4\x62\x08\xb9\xfb\x4c\xb1\xa1\xfa"
      "\x96\x2a\x8b\x00\x00\xdc\x2e\x31\x93\x79\xea\x1e\x5a\x07\xae\xb3\xf9\xcd"
      "\x4e\x64\x8d\xf4\xdd\x18\xe6\x25\x3e\x7b\x23\x10\xa7\x8d\x63\xa2\x32\xa2"
      "\xa4\x07\x58\x02\x7a\x47\x2e\x7d\x26\x3e\xf5\x67\xa8\x41\x86\x37\x87\x88"
      "\x9b\xf1\xc9\x0f\xcc\xf3\x19\x54\xa9\x40\xc8\xb5\x84\xca\x69\xa5\x12\xf2"
      "\x8e\xde\xc0\x86\xb1\xc0\x82\x3c\x02\x88\x40\xee\xaf\x3f\x5d\x87\x69\x02"
      "\x3c\x01\x21\x86\x14\xf4\xfa\x40\xbe\x98\x92\xe7\xa2\x85\xac\x63\xf7\xf9"
      "\x7a\xaa\x5b\x8e\xcc\x86\xea\x8c\x61\x93\xbc\x21\xa2\xb8\x33\xe5\xc2\xc9"
      "\xc7\x03\xc4\xcf\xa0\x63\xdd\x34\xc2\x45\x70\x6b\xde\x3d\x7a\xc3\x73\xab"
      "\x04\xb6\x2b\x41\x11\xb5\x9e\xab\xd4\x36\xdd\x97\xe7\x88\xa3\x6e\xf2\x5b"
      "\xad\x99\xbe\x2a\xa9\x24\x94\x95\x58\xc8\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x6e\x90\x27\x7c\x25\xa2\x4d\x59\x0a\x73\x06\xae\x96\x05\x62"
      "\xb9\x18\x3b\x4d\xe2\xdd\x5e\x2f\xc7\x31\xdd\xfd\x1a\x23\xb3\xe9\x91\xd9"
      "\x47\xcd\x02\x62\x24\x52\x3a\xbd\x11\x56\x66\x5e\x5e\x57\x3a\x6d\x1e\xc5"
      "\x98\xee\xc9\xf1\x07\x90\xc1\x87\xde\xb4\x57\xee\xa1\xea\xcd\x5f\xa6\x17"
      "\xfc\x1a\x54\xc3\x7a\x12\xf3\x5b\x60\x64\x78\x4a\x33\xe0\x1c\x31\x6e\x12"
      "\x43\x4f\xb0\xc1\x38\xcd\x31\x27\x46\x03\xd8\x51\x40\x95\x00\x17\xfe\xde"
      "\x1b\x75\x61\x5d\x27\x29",
      456);
  *(uint16_t*)0x2000098e = r[0];
  *(uint8_t*)0x20000990 = -1;
  sprintf((char*)0x20000991, "%023llo", (long long)-1);
  memcpy(
      (void*)0x200009a8,
      "\x2d\xaa\x64\x0e\x5b\xbc\x38\x82\xd2\xae\xbe\xe9\xd9\x61\xbb\xfa\x49\xc0"
      "\xcc\x74\xa9\x7c\xba\x86\xce\x93\x7a\x83\xdf\xb1\x7e\x0d\xa2\x12\x96\x82"
      "\x33\xc9\x84\x67\x3d\x15\x18\x6f\xf5\x46\x86\x42\x43\x2a\xec\x49\x87\x7c"
      "\x37\x9b\x73\x23\x63\x44\xbc\x4f\x8b\x9e\xfb\xef\xde\xa7\x1e\xf7\x7f\x6f"
      "\xac\x49\x35\x1c\xf2\x48\x29\x91\x05\x40\x96\x30\x9c\xe9\x4f\x64\x7a\x90"
      "\xfb\xbf\x45\x4f\xb0\x4e\xdc\xde\x83\x9d\x82\xef\xf8\xd9\x3f\xab\xd7\x4a"
      "\xbe\x79\x54\x60\x2b\xaa\x4e\x1b\xbb\xaf\x83\x1f\xc0\x77\xfc\xa0\xeb\x49"
      "\x8f\xbb\x6a\x2c\x2c\x27\xdc\x72\xa4\x2d\xc7\x62\xcb\x97\x0b\xb4\x9f\xa9"
      "\x2e\x7e\xd4\xb6\x39\x76\xbc\x93\xb0\x4a\x4a\x43\x71\x56\x67\x3e\x1d\x31"
      "\xa7\xb1\x03\xc8\x5a\xb4\xf3\x84\x1e\xbc\xa7\x29\x8b\x0f\x33\x83\x24\xaf"
      "\x7d\x87\x25\x11\x9c\x4e\xa3\xd8\x02\x04\x6c\x48\x18\xb4\x66\x94\xcb\x73"
      "\xdb\x2a\x17\x7c\x10\x77\xbe\x54\xdf\x45\x01\xc1\xdd\xf8\x86\x10\xc5\x85"
      "\x70\xcd\xb9\x3c\x41\x3e\xf4\xf8\x84\xfb\x3a\xbb\x4b\x7c\xa9\x66\x90\xd8"
      "\x31\x5d\xda\xee\x05\x84\xcf",
      241);
  *(uint16_t*)0x20000a99 = r[0];
  *(uint32_t*)0x20000a9b = -1;
  sprintf((char*)0x20000a9f, "0x%016llx", (long long)-1);
  sprintf((char*)0x20000ab1, "%020llu", (long long)-1);
  sprintf((char*)0x20000ac5, "0x%016llx", (long long)-1);
  sprintf((char*)0x20000ad7, "0x%016llx", (long long)-1);
  sprintf((char*)0x20000ae9, "%023llo", (long long)-1);
  syz_mount_image(
      /*fs=*/0x20000180, /*dir=*/0x20000100,
      /*flags=MS_I_VERSION|MS_PRIVATE|MS_SYNCHRONOUS|MS_STRICTATIME|MS_REMOUNT|MS_RELATIME|0x240c*/
      0x1a4243c, /*opts=*/0x200007c0, /*chdir=*/1, /*size=*/0,
      /*img=*/0x20000000);
  memcpy((void*)0x20000080, "./bus\000", 6);
  syscall(__NR_open, /*file=*/0x20000080ul,
          /*flags=O_SYNC|O_NOATIME|O_CREAT|O_RDWR|0x400000000*/ 0x400141042ul,
          /*mode=*/0ul);
  memcpy((void*)0x20000380, "/dev/loop", 9);
  *(uint8_t*)0x20000389 = 0x30;
  *(uint8_t*)0x2000038a = 0;
  memcpy((void*)0x20000140, "./bus\000", 6);
  syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul, /*type=*/0ul,
          /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
  memcpy((void*)0x20000000, "./bus\000", 6);
  res = syscall(__NR_open, /*file=*/0x20000000ul,
                /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_RDWR|0x3c*/ 0x14113eul,
                /*mode=*/0ul);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000080, "#! ", 3);
  *(uint8_t*)0x20000083 = 0xa;
  syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000080ul, /*len=*/0x208e24bul);
}
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);
  const char* reason;
  (void)reason;
  do_sandbox_none();
  return 0;
}