// https://syzkaller.appspot.com/bug?id=abb6cc54bd2802dfdeb0978f7adf870325b80f92
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <errno.h>
#include <errno.h>
#include <errno.h>
#include <fcntl.h>
#include <fcntl.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <net/if_arp.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <signal.h>
#include <stdarg.h>
#include <stdarg.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static void exitf(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit(kRetryStatus);
}

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  doexit(sig);
  for (;;) {
  }
}

static void install_segv_handler()
{
  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(...)                                                \
  {                                                                    \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);               \
    if (_setjmp(segv_env) == 0) {                                      \
      __VA_ARGS__;                                                     \
    }                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);               \
  }

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void use_temporary_dir()
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

static void vsnprintf_check(char* str, size_t size, const char* format,
                            va_list args)
{
  int rv;

  rv = vsnprintf(str, size, format, args);
  if (rv < 0)
    fail("tun: snprintf failed");
  if ((size_t)rv >= size)
    fail("tun: string '%s...' doesn't fit into buffer", str);
}

static void snprintf_check(char* str, size_t size, const char* format,
                           ...)
{
  va_list args;

  va_start(args, format);
  vsnprintf_check(str, size, format, args);
  va_end(args);
}

#define COMMAND_MAX_LEN 128
#define PATH_PREFIX                                                    \
  "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
#define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)

static void execute_command(const char* format, ...)
{
  va_list args;
  char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
  int rv;

  va_start(args, format);
  memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
  vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format,
                  args);
  rv = system(command);
  if (rv != 0)
    fail("tun: command \"%s\" failed with code %d", &command[0], rv);

  va_end(args);
}

static int tunfd = -1;
static int tun_frags_enabled;

#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define MAX_PIDS 32
#define ADDR_MAX_LEN 32

#define LOCAL_MAC "aa:aa:aa:aa:aa:%02hx"
#define REMOTE_MAC "bb:bb:bb:bb:bb:%02hx"

#define LOCAL_IPV4 "172.20.%d.170"
#define REMOTE_IPV4 "172.20.%d.187"

#define LOCAL_IPV6 "fe80::%02hxaa"
#define REMOTE_IPV6 "fe80::%02hxbb"

#define IFF_NAPI 0x0010
#define IFF_NAPI_FRAGS 0x0020

static void initialize_tun(uint64_t pid)
{
  if (pid >= MAX_PIDS)
    fail("tun: no more than %d executors", MAX_PIDS);
  int id = pid;

  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf(
        "tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as "
           "intended\n");
    return;
  }

  char iface[IFNAMSIZ];
  snprintf_check(iface, sizeof(iface), "syz%d", id);

  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, iface, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
      fail("tun: ioctl(TUNSETIFF) failed");
  }
  if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
    fail("tun: ioctl(TUNGETIFF) failed");
  tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;

  char local_mac[ADDR_MAX_LEN];
  snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC, id);
  char remote_mac[ADDR_MAX_LEN];
  snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC, id);

  char local_ipv4[ADDR_MAX_LEN];
  snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, id);
  char remote_ipv4[ADDR_MAX_LEN];
  snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, id);

  char local_ipv6[ADDR_MAX_LEN];
  snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, id);
  char remote_ipv6[ADDR_MAX_LEN];
  snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, id);

  execute_command("sysctl -w net.ipv6.conf.%s.accept_dad=0", iface);

  execute_command("sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                  iface);

  execute_command("ip link set dev %s address %s", iface, local_mac);
  execute_command("ip addr add %s/24 dev %s", local_ipv4, iface);
  execute_command("ip -6 addr add %s/120 dev %s", local_ipv6, iface);
  execute_command("ip neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv4, remote_mac, iface);
  execute_command("ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv6, remote_mac, iface);
  execute_command("ip link set dev %s up", iface);
}

static void setup_tun(uint64_t pid, bool enable_tun)
{
  if (enable_tun)
    initialize_tun(pid);
}

static int read_tun(char* data, int size)
{
  if (tunfd < 0)
    return -1;

  int rv = read(tunfd, data, size);
  if (rv < 0) {
    if (errno == EAGAIN)
      return -1;
    if (errno == EBADFD)
      return -1;
    fail("tun: read failed with %d", rv);
  }
  return rv;
}

static void flush_tun()
{
  char data[SYZ_TUN_MAX_PACKET_SIZE];
  while (read_tun(&data[0], sizeof(data)) != -1)
    ;
}

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block",
            (uint8_t)a1, (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    NONFAILING(strncpy(buf, (char*)a0, sizeof(buf)));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_IO);
}

static int do_sandbox_none(int executor_pid, bool enable_tun)
{
  int pid = fork();
  if (pid)
    return pid;

  sandbox_common();
  setup_tun(executor_pid, enable_tun);

  loop();
  doexit(1);
}

static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exitf("opendir(%s) failed due to NOFILE, exiting");
    }
    exitf("opendir(%s) failed", dir);
  }
  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);
    struct stat st;
    if (lstat(filename, &st))
      exitf("lstat(%s) failed", filename);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exitf("unlink(%s) failed", filename);
      if (umount2(filename, MNT_DETACH))
        exitf("umount(%s) failed", filename);
    }
  }
  closedir(dp);
  int i;
  for (i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, MNT_DETACH))
          exitf("umount(%s) failed", dir);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exitf("rmdir(%s) failed", dir);
  }
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    char cwdbuf[256];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      fail("failed to mkdir");
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      if (chdir(cwdbuf))
        fail("failed to chdir");
      flush_tun();
      test();
      doexit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid)
        break;
      usleep(1000);
      if (current_time_ms() - start > 5 * 1000) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
    remove_dir(cwdbuf);
  }
}

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
#ifndef __NR_userfaultfd
#define __NR_userfaultfd 323
#endif

long r[81];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x10ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    r[1] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 2:
    NONFAILING(memcpy((void*)0x2040aff5,
                      "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00",
                      11));
    r[3] = syz_open_dev(0x2040aff5ul, 0x0ul, 0x1ul);
    break;
  case 3:
    NONFAILING(memcpy((void*)0x20909ff8,
                      "\x00\x00\x00\x00\x00\x00\x02\x00", 8));
    r[5] = syscall(__NR_memfd_create, 0x20909ff8ul, 0x2ul);
    break;
  case 4:
    NONFAILING(*(uint64_t*)0x200a3ff0 = (uint64_t)0x20c13e00);
    NONFAILING(*(uint64_t*)0x200a3ff8 = (uint64_t)0x1bb);
    NONFAILING(memcpy(
        (void*)0x20c13e00,
        "\xb5\x10\x7b\x98\x1c\x0d\xed\x89\x94\x42\xee\xc2\xca\xb7\xe2"
        "\xc9\xe6\xcd\x9a\xee\xb4\x18\xde\xd0\x08\x97\x23\x03\x33\x9e"
        "\xa7\x48\x1a\xa2\xb3\xd0\x78\x6a\x90\x17\x40\xa8\x6a\xbe\x45"
        "\x07\x45\x32\x17\xc9\xf6\xa4\xaf\xf9\xf4\x2d\x64\xe9\xdf\xe9"
        "\x5e\xdc\x99\xab\x6e\x28\xe2\xcf\xb8\x89\xb9\x00\xa9\xd9\x99"
        "\x14\x0b\x47\x17\xbd\x64\x80\xea\x00\x0f\x7e\x16\x7e\xe7\xbe"
        "\xc2\xcf\xe3\x16\x73\xa8\x8b\xa1\x60\xa9\xbd\x59\x3e\xb0\xd9"
        "\x0f\x1e\x0c\x2e\xee\x40\xa1\x42\xa5\x0a\x08\x13\x7a\xe8\x65"
        "\x8d\xe4\xd1\xa0\x8a\xd6\xd2\x38\x1c\xfd\x97\x30\x02\x09\x06"
        "\x5a\x18\x01\x69\xb7\x94\x7c\x32\xce\x3f\x3f\xf4\x22\xa7\x65"
        "\x28\x04\x50\x5a\x06\xa0\x56\x73\x8b\x62\x74\x58\x82\x32\xde"
        "\x69\xf6\x78\x25\xae\x03\x13\x9e\x7d\x60\xca\x79\xc5\x94\x08"
        "\xe6\x49\xfa\xc9\x3d\x6b\xab\x13\x11\x2e\x70\xb8\xa5\x2e\x68"
        "\xad\x63\xba\xc4\xf0\xaa\xba\x1b\x71\x33\x77\x9f\xda\xb0\x6f"
        "\x09\xe0\x22\xf9\xd6\x05\xe8\x00\x51\xce\x42\x9d\x28\x12\xf6"
        "\x32\xf6\x58\x58\x28\x93\x3f\x8b\xc1\x5d\x79\x27\xe4\x1b\x1e"
        "\xbb\x16\xe7\x15\x93\xd9\x2e\xce\x21\xd5\xf0\x42\x54\xc2\xc7"
        "\x41\x67\xab\xcb\x2f\x27\x76\x13\xbc\x7f\x7c\xdb\x6a\x36\x98"
        "\xe2\xa8\x79\xfa\xbb\x48\x10\x15\x92\x8f\x06\xd3\x92\x5c\xa8"
        "\x03\xf5\xcb\x27\x5c\x38\x1c\x3e\x91\xf4\x52\x70\x8e\xc8\x82"
        "\x7d\x8c\x76\x2c\xb8\x86\xe8\x68\x69\x0d\x1a\x62\x59\x78\xd7"
        "\xb9\x78\x6f\x21\xa7\xd6\x0f\x27\x3a\x5f\xb5\xc8\xa0\xdd\xdc"
        "\xaa\x65\x38\x72\x64\xa1\x04\xca\xf8\x2a\x45\x1f\x4e\x83\x92"
        "\x8a\xa5\xd5\xfa\xa7\x9f\x00\x95\xbf\x9c\xae\x38\x31\x6a\xb8"
        "\xa2\x73\xdf\x80\xdd\x74\xc0\xc1\xa0\xf8\xda\xa2\x00\x6d\x01"
        "\xad\xcb\x97\x22\x9d\xeb\x1b\xdf\xdb\x57\xd1\x7a\x98\x41\x5d"
        "\x1a\xba\x54\x26\x97\xf1\xa9\x2b\x45\xca\x50\x2d\xc8\xb5\x1b"
        "\xf5\x4b\xa1\x7d\xcc\xa0\xe1\xfe\x5c\x52\x52\x24\x3f\x0c\xf9"
        "\x7a\xd6\x10\x44\xc5\xef\xb4\x3a\x26\xae\x00\x4b\x06\xbf\xf6"
        "\x9d\xf7\xed\xf2\x48\xc0\x3c\x11",
        443));
    r[9] = syscall(__NR_pwritev, r[5], 0x200a3ff0ul, 0x1ul, 0x49ul);
    break;
  case 5:
    r[10] = syscall(__NR_ioctl, r[3], 0x4c00ul, r[5]);
    break;
  case 6:
    NONFAILING(*(uint64_t*)0x200ddff8 = (uint64_t)0x0);
    r[12] =
        syscall(__NR_sendfile, r[3], r[5], 0x200ddff8ul, 0x100000001ul);
    break;
  case 7:
    r[13] = syscall(__NR_gettid);
    break;
  case 8:
    NONFAILING(*(uint64_t*)0x206fdf18 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x206fdf20 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x206fdf28 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x206fdf30 = (uint64_t)0xfffffffffffff000);
    NONFAILING(*(uint64_t*)0x206fdf38 = (uint64_t)0x3ea);
    NONFAILING(*(uint32_t*)0x206fdf40 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x206fdf44 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x206fdf48 = (uint32_t)0x1e);
    NONFAILING(*(uint32_t*)0x206fdf4c = (uint32_t)0xd);
    NONFAILING(memcpy((void*)0x206fdf50,
                      "\x32\xb0\x5d\x80\x1e\x66\x49\xb8\x12\xd2\xe6\xb6"
                      "\xcc\x15\x94\x42\xb1\x21\x53\x13\x2c\x9b\xf9\x44"
                      "\xcf\x27\x00\x12\xda\x21\xba\x80\xc0\x40\x39\x77"
                      "\x14\xf7\x7f\xaa\x1e\x8e\xd3\xfc\x72\x09\xd6\x4d"
                      "\x14\xce\xc7\x47\x9b\x05\xca\xe0\xc7\x32\xde\x3a"
                      "\xb6\xcc\x5f\x4b",
                      64));
    NONFAILING(memcpy((void*)0x206fdf90,
                      "\x94\x14\x06\x56\x9a\x73\xd0\x65\x56\xae\xe2\x94"
                      "\x3f\x5e\x94\xc8\x44\xa5\x55\x27\xaf\x84\xfb\x28"
                      "\xf0\x11\x82\x5a\xf6\x09\x10\xe7\x70\x6e\xb4\x78"
                      "\x6b\x3a\x97\x6d\xa7\xb5\x72\x11\xaf\x83\x4e\x7d"
                      "\x98\xb8\x39\x62\x96\x89\xa1\x47\x2f\x55\x78\xb2"
                      "\x99\x8b\xd7\xda",
                      64));
    NONFAILING(memcpy((void*)0x206fdfd0,
                      "\xef\xd5\x59\x22\xa7\xdc\x32\x93\x94\x61\x0a\xfb"
                      "\xac\xd2\x37\xd2\x34\xaf\xb8\x05\xeb\xc3\xb9\x4e"
                      "\x4f\xb9\xd5\x6d\xd0\x3f\x1f\x8b",
                      32));
    NONFAILING(*(uint64_t*)0x206fdff0 = (uint64_t)0x905);
    NONFAILING(*(uint64_t*)0x206fdff8 = (uint64_t)0x8);
    r[28] = syscall(__NR_ioctl, r[3], 0x4c04ul, 0x206fdf18ul);
    break;
  case 9:
    r[29] = syscall(__NR_ftruncate, r[3], 0x8ul);
    break;
  case 10:
    r[30] = syscall(__NR_sync_file_range, r[3], 0x7ful, 0x801ul, 0x7ul);
    break;
  case 11:
    NONFAILING(*(uint16_t*)0x20685000 = (uint16_t)0x0);
    NONFAILING(*(uint16_t*)0x20685002 = (uint16_t)0x0);
    NONFAILING(*(uint32_t*)0x20685004 = (uint32_t)0x9);
    NONFAILING(*(uint32_t*)0x20685008 = (uint32_t)0x5);
    NONFAILING(*(uint32_t*)0x2068500c = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x208daffc = (uint32_t)0x10);
    r[37] = syscall(__NR_getsockopt, r[5], 0x84ul, 0x22ul, 0x20685000ul,
                    0x208daffcul);
    if (r[37] != -1)
      NONFAILING(r[38] = *(uint32_t*)0x2068500c);
    break;
  case 12:
    NONFAILING(*(uint32_t*)0x2054ff74 = r[38]);
    NONFAILING(*(uint16_t*)0x2054ff78 = (uint16_t)0xa);
    NONFAILING(*(uint16_t*)0x2054ff7a = (uint16_t)0x204e);
    NONFAILING(*(uint32_t*)0x2054ff7c = (uint32_t)0x8);
    NONFAILING(*(uint8_t*)0x2054ff80 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff81 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff82 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff83 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff84 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff85 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff86 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff87 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff88 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff89 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8a = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8b = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8c = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8d = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8e = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2054ff8f = (uint8_t)0x0);
    NONFAILING(*(uint32_t*)0x2054ff90 = (uint32_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ff98 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffa0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffa8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffb0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffb8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffc0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffc8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffd0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffd8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffe0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054ffe8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2054fff0 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x200e5000 = (uint32_t)0x8c);
    r[73] = syscall(__NR_getsockopt, r[5], 0x84ul, 0x6ul, 0x2054ff74ul,
                    0x200e5000ul);
    break;
  case 13:
    r[74] = syscall(__NR_userfaultfd, 0x80000ul);
    break;
  case 14:
    NONFAILING(*(uint32_t*)0x20adf000 = (uint32_t)0x7);
    r[76] = syscall(__NR_setsockopt, r[5], 0x84ul, 0x20ul, 0x20adf000ul,
                    0x4ul);
    break;
  case 15:
    NONFAILING(memcpy((void*)0x20e57ff5,
                      "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00",
                      11));
    r[78] = syz_open_dev(0x20e57ff5ul, 0x0ul, 0x4102ul);
    break;
  case 16:
    r[79] = syscall(__NR_mmap, 0x20e5b000ul, 0x1000ul, 0x3ul, 0x2011ul,
                    r[78], 0x0ul);
    break;
  case 17:
    r[80] = syscall(__NR_shmctl, 0x0ul, 0x3ul, 0x20e5b000ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[36];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 18; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      install_segv_handler();
      use_temporary_dir();
      int pid = do_sandbox_none(i, true);
      int status = 0;
      while (waitpid(pid, &status, __WALL) != pid) {
      }
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}