// https://syzkaller.appspot.com/bug?id=8213f8695d54a1cea6add76c0909ea2db226d486
// 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 319
#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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

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

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

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

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

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

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

#define ZLIB_HEADER_WIDTH 2

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

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

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

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

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  } else if (strncmp(fs, "gfs2", 4) == 0 &&
             (strstr(opts, "errors=panic") || strstr(opts, "debug"))) {
    strcat(opts, ",errors=withdraw");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    if (chdir(target) == -1) {
      err = errno;
      close(res);
      res = -1;
    }
  }

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

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

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

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

#define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak"

static const char* setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan=off")) {
    if (errno == EBUSY)
      return "KMEMLEAK disabled: increase CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE"
             " or unset CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF";
    return "failed to write(kmemleak, \"scan=off\")";
  }
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  if (!write_file(KMEMLEAK_FILE, "clear"))
    return "failed to write(kmemleak, \"clear\")";
  return NULL;
}

static void check_leaks(void)
{
  int fd = open(KMEMLEAK_FILE, O_RDWR);
  if (fd == -1)
    exit(1);
  uint64_t start = current_time_ms();
  if (write(fd, "scan", 4) != 4)
    exit(1);
  sleep(1);
  while (current_time_ms() - start < 4 * 1000)
    sleep(1);
  if (write(fd, "scan", 4) != 4)
    exit(1);
  static char buf[128 << 10];
  ssize_t n = read(fd, buf, sizeof(buf) - 1);
  if (n < 0)
    exit(1);
  int nleaks = 0;
  if (n != 0) {
    sleep(1);
    if (write(fd, "scan", 4) != 4)
      exit(1);
    if (lseek(fd, 0, SEEK_SET) < 0)
      exit(1);
    n = read(fd, buf, sizeof(buf) - 1);
    if (n < 0)
      exit(1);
    buf[n] = 0;
    char* pos = buf;
    char* end = buf + n;
    while (pos < end) {
      char* next = strstr(pos + 1, "unreferenced object");
      if (!next)
        next = end;
      char prev = *next;
      *next = 0;
      fprintf(stderr, "BUG: memory leak\n%s\n", pos);
      *next = prev;
      pos = next;
      nleaks++;
    }
  }
  if (write(fd, "clear", 5) != 5)
    exit(1);
  close(fd);
  if (nleaks)
    exit(1);
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/sys/kernel/debug/failslab/task-filter", "Y"},
      {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"},
      {"/sys/kernel/debug/fail_futex/task-filter", "Y"},
      {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"},
      {"/sys/kernel/debug/fail_make_request/task-filter", "Y"},
      {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"},
      {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

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();
      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;
    }
    check_leaks();
  }
}

void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$hfsplus arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {68 66 73 70 6c 75 73 00} (length 0x8)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
  //      61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 00}
  //      (length 0xfa)
  //    }
  //    flags: mount_flags = 0x2000010 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x6d2 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x6d2)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000100, "hfsplus\000", 8));
  NONFAILING(
      memcpy((void*)0x200000002900,
             "./"
             "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
             "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
             "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
             "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000",
             250));
  NONFAILING(memcpy(
      (void*)0x200000000e80,
      "\x78\x9c\xec\xdd\xcd\x6f\x1c\x67\x1d\x07\xf0\xef\xac\xd7\xae\x37\x54\xc1"
      "\x69\x13\x1a\xa1\x22\xac\x44\x2a\x48\x11\x89\x13\x2b\x85\x70\xc1\x20\x84"
      "\x72\xa8\x50\x55\x0e\x3d\x5b\x89\xd3\x58\xdd\x24\x55\xe2\xa2\xb4\x42\xe0"
      "\x02\x82\x13\x12\x87\xfe\x01\x05\xc9\x37\x0e\x08\x89\x7b\x50\xb8\x70\x29"
      "\xb7\x5e\x7d\xac\x84\xc4\x25\xe2\x10\xf5\xb2\x68\x66\x67\xd7\xbb\xf6\xfa"
      "\x2d\x2f\x6b\x1b\x3e\x9f\x68\x32\xcf\xcc\x33\xcf\x33\xbf\xf9\xcd\x33\x33"
      "\xbb\x6b\xad\x36\xc0\xff\xad\xab\xe7\xd2\x7c\x90\x22\x57\xcf\xbd\x71\xbf"
      "\x5c\x5e\x5f\x9b\x6f\xaf\xaf\xcd\xbf\x50\x57\xb7\x93\x94\xe5\x46\xd2\xec"
      "\xce\x52\xdc\x4e\x8a\x87\xc9\x42\x59\x5f\x0c\x4c\x19\x98\x6f\xf1\xf1\xf2"
      "\x95\xb7\x3e\x7b\xb4\xfe\x79\x77\xa9\x59\x4f\xd5\xf6\x13\x3b\xb5\x1b\x61"
      "\xc4\xb6\xab\xf5\x94\xd9\xba\xbf\xd9\x91\x2d\x27\xf7\xba\x8b\xd5\x3a\xbc"
      "\xbc\x98\xe4\x5a\x3d\x1f\x36\xb5\xd7\xbe\x86\x36\x2c\x93\x76\xb6\x9e\xc3"
      "\x81\xeb\x6c\xb1\xba\x9f\xe6\xfb\xb9\x6e\x81\x43\xa6\xf7\x74\x2a\xba\xcf"
      "\xcd\x2d\x66\x92\x63\x49\xa6\xeb\xd7\x01\xa9\xef\x0e\x8d\xf1\x45\xf8\x7c"
      "\xec\xeb\x2e\x07\x00\x00\x00\x47\xc0\xa8\x8f\xbd\x3f\xbd\x73\x00\x81\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\xc0\x11\x57\xff\xfe\x7f\x51\x4f\x8d\x7a"
      "\x9e\xd9\x14\xbd\xdf\xff\x9f\xea\xad\xab\xcb\x87\xd0\xc2\x9e\xb7\x7c\xf0"
      "\x5c\xe3\x00\x00\x00\x00\x00\x00\x00\x80\xf1\xf8\xfa\xe3\x3c\xce\xfd\x1c"
      "\xef\x2d\x77\x8a\xea\x6f\xfe\x67\xaa\x85\x93\xf9\xa2\x93\x7c\x29\xef\xe7"
      "\x5e\x96\x72\x37\xe7\x73\x3f\x8b\x59\xc9\x4a\xee\xe6\x62\x92\x99\x81\x8e"
      "\xa6\xee\x2f\xae\xac\xdc\xbd\xd8\x6f\x59\x1a\xdd\xf2\xd2\xc8\x96\x97\xc6"
      "\x75\xc4\x00\x00\x00\x00\x00\x00\x00\xf0\x3f\xe9\x97\x69\x6d\xfc\xfd\x1f"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0e\x83\x22\x99\xe8\xce\xaa"
      "\xe9\x64\x3d\xcf\x4c\x1a\xcd\x6c\xd4\x65\x35\xf9\x67\x92\xa9\x83\x8e\x77"
      "\x1f\x8a\x51\x2b\x1f\x8c\x3f\x0e\x00\x00\x00\x78\x2a\xd3\x4f\xd0\xe6\xcb"
      "\x8f\xf3\x38\xf7\x73\xbc\xb7\xdc\x29\xaa\xf7\xfc\x5f\xa9\xde\x2f\x4f\xe7"
      "\xfd\xdc\xce\x4a\x96\xb3\x92\x76\x96\x72\xbd\x7e\x0f\x5d\xbe\xeb\x6f\xac"
      "\xaf\xcd\xb7\xd7\xd7\xe6\x6f\x95\x53\xb9\x3c\xdc\xef\xf7\xff\xbd\xaf\x30"
      "\xa6\xea\x1e\x26\xaa\xa5\x51\x7b\x3e\x5d\x6d\xd1\xca\x8d\x2c\x57\x6b\xce"
      "\xe7\x5a\x15\xcc\xf5\x34\xba\xfb\x3e\x9b\x9c\xee\xc5\x33\x10\xd7\x80\x8f"
      "\xca\x98\x8a\xef\xd5\xf6\x18\x59\xb3\x4e\x6b\xb9\xb3\xdf\x6f\xf7\x29\xc2"
      "\x33\x31\xfc\x51\x44\x63\x87\x2d\x5b\x1b\xc1\x25\xfd\x8c\xcc\xd5\xb1\x95"
      "\x2d\x4f\x74\x33\x50\x54\x1f\xd4\x24\x9b\x33\xb1\xeb\xd9\x69\x0e\x2d\xcd"
      "\x54\xbd\x4e\xf6\xf7\x74\x31\x8d\xfe\x27\x3f\x27\x9f\x26\xe7\xab\xa3\xf7"
      "\x7e\xac\x9e\x97\xc7\xf3\x9b\xe7\x9a\xf3\xfd\xea\x67\xa2\x91\x2a\x13\x97"
      "\x7a\xa3\xaf\xbc\x66\x76\xce\x44\xf2\x8d\xbf\xfe\xe9\xed\x9b\xed\xdb\xef"
      "\xde\xbc\x71\xef\xdc\xe1\x39\xa4\x5d\x4c\x6c\xb3\x7e\xf3\x98\x98\x1f\xc8"
      "\xc4\x2b\x47\x3a\x13\xcd\x7d\x6e\x3f\x57\x65\xe2\x54\x7f\xf9\x6a\x7e\x94"
      "\x9f\xe4\x5c\x66\xf3\x66\xee\x66\x39\x3f\xcd\x62\x56\xb2\x94\x4e\x5d\xbf"
      "\x58\x8f\xe7\xf2\xff\x99\x9d\x33\xb5\x30\xb4\xf4\xe6\x6e\x91\x4c\xd5\xe7"
      "\xa5\x7b\xce\xf6\x12\xd3\x6c\x7e\x58\x95\x16\x73\xa6\x6a\x7b\x3c\xcb\x29"
      "\x72\x27\xd7\xb3\x94\xd7\xab\x7f\x97\x72\x31\xdf\xce\xe5\x5c\xce\x95\x81"
      "\x33\x7c\x6a\xdb\xb8\xab\x63\xab\xae\xfa\xc6\xe6\xab\xbe\x77\xa6\xff\x36"
      "\x32\xf8\xb3\xdf\xac\x0b\xe5\xdd\xed\xb7\x1b\x77\xb9\x85\x9d\x8e\x78\xbb"
      "\xd1\xf9\xac\x74\xef\xfd\x65\x5e\x4f\x0c\xe4\xb5\x3b\xea\x1f\xf5\xb7\x3a"
      "\x31\x70\x1d\xcc\x0d\x64\xe9\xa5\x5e\x76\x26\x47\x76\xfe\x24\xcf\xa3\xe6"
      "\x57\xeb\x42\xb9\x8f\x5f\xed\xf2\x9c\x18\xaf\x99\x3a\x13\xe5\x05\xd4\x7b"
      "\x4a\xf4\xa2\x7b\xb9\x9b\x89\x66\xf5\x2c\xda\x3a\xce\xff\xd0\x29\xdb\xa5"
      "\x7d\xbb\xd3\xb9\xb9\xf8\xde\x36\xfd\x6f\x7e\x58\xbc\x56\xcf\xcb\x61\xb5"
      "\xf6\xb5\xdd\xb6\xee\x19\x7d\x2a\x9e\xad\x72\xbc\xbc\x94\xe9\xfa\x4e\x32"
      "\x3c\x3a\xca\xba\x97\xfb\x77\x99\x81\xba\xce\xc6\x58\xee\xd6\x0d\x3f\x71"
      "\xcb\x76\xa7\xaa\xba\xa2\xe8\x5d\xa9\x3f\xce\x9d\x6a\x00\x6c\xbd\x52\xa7"
      "\xea\xd7\x70\x5b\x7b\xba\x54\xd5\xbd\x32\xb2\x6e\xbe\xaa\x3b\x3d\x50\x37"
      "\xf4\x7a\x2b\x77\xd2\xce\xf5\x31\xe4\x0f\x80\x27\xf1\x8f\xb7\xfb\xc5\x99"
      "\x1c\x9b\x6a\xfd\xab\xf5\x69\xeb\x93\xd6\xaf\x5b\x37\x5b\x6f\x4c\xff\xe0"
      "\x85\xef\xbc\xf0\xea\x54\x26\xff\x3e\xf9\xdd\xe6\xdc\xc4\x6b\x8d\x57\x8b"
      "\xbf\xe4\x93\xfc\x7c\xe3\xfd\x3f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf0\xe4\xee\x7d\xf0"
      "\xe1\xbb\x8b\xed\xf6\xd2\xdd\xd1\x85\xc6\xf6\x55\x43\x85\x56\x36\xaf\xd9"
      "\xad\xe7\x4d\x85\xa2\xfe\x41\x9f\xfd\xb5\x3a\xbc\x85\xe9\x24\x43\x6b\xaa"
      "\xdf\x39\x1a\x7b\x18\xad\xcd\x61\x6c\x29\x74\x7e\x91\x8c\x3d\x3f\xbd\x1f"
      "\x11\x1c\xbd\xcd\xef\xca\x42\x73\xcb\x88\x1a\x55\x58\x18\x5a\xf3\xe7\xad"
      "\x1d\x7e\xb4\xcf\x08\x8b\xbd\x5d\x17\xcf\xb1\xd0\xc8\x78\x77\x3a\x91\xd1"
      "\x03\xe0\x00\x6f\x4a\xc0\x58\x5c\x58\xb9\xf5\xde\x85\x7b\x1f\x7c\xf8\xad"
      "\xe5\x5b\x8b\xef\x2c\xbd\xb3\x74\x7b\xf2\xf2\xe5\x2b\x73\x57\x2e\xbf\x3e"
      "\x7f\xe1\xc6\x72\x7b\x69\xae\xfb\xff\x41\x47\x09\x3c\x0f\x43\x2f\x03\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x80\x23\x61\xd4\x17\x03\xce\xbc\xb8\xdb"
      "\x97\x46\xf6\xf4\x1d\x8f\xfe\x9a\x83\x3e\x46\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x68\xbb\x7a"
      "\x2e\xcd\x07\x29\x72\x71\xee\xfc\x5c\xb9\xbc\xbe\x36\xdf\x2e\xa7\x5e\x79"
      "\x63\xcb\x66\x92\x46\x23\x29\x7e\x96\x14\x0f\x93\x85\x74\xa7\xcc\x0c\x74"
      "\x57\xe4\x8f\x0f\xd3\x19\xb1\x9f\x8f\x97\xaf\xbc\xf5\xd9\xa3\xf5\xcf\x37"
      "\xfa\x6a\x76\xb7\x4f\x1a\xf5\x7c\x7b\x3b\xd7\x26\x59\xad\xa7\xcc\x26\x99"
      "\xa8\xe7\x4f\x61\xa8\xbf\x6b\x4f\xdd\x5f\xf1\x9f\xde\x31\x94\x09\xfb\xa2"
      "\xd3\xe9\x2c\x3c\x5d\x7c\xf0\x6c\xfc\x37\x00\x00\xff\xff\x63\xae\xf5"
      "\x26",
      1746));
  NONFAILING(syz_mount_image(/*fs=*/0x200000000100, /*dir=*/0x200000002900,
                             /*flags=MS_LAZYTIME|MS_SYNCHRONOUS*/ 0x2000010,
                             /*opts=*/0x2000000022c0, /*chdir=*/1,
                             /*size=*/0x6d2, /*img=*/0x200000000e80));
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  if ((reason = setup_leak()))
    printf("the reproducer may not work as expected: leak checking setup "
           "failed: %s\n",
           reason);
  install_segv_handler();
  loop();
  return 0;
}