// https://syzkaller.appspot.com/bug?id=7d3ae3514bf9a76edadf2da36fb388a70e37a3d0
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if_arp.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.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/futex.h>
#include <linux/genetlink.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/netlink.h>
#include <linux/tcp.h>

unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  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);
  }
  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(...)                                                        \
  {                                                                            \
    __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 void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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)
    exit(1);
  if ((size_t)rv >= size)
    exit(1);
}

#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(bool panic, 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);
  va_end(args);
  rv = system(command);
  if (rv) {
    if (panic)
      exit(1);
  }
}

static int tunfd = -1;
static int tun_frags_enabled;
#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define TUN_IFACE "syz_tun"

#define LOCAL_MAC "aa:aa:aa:aa:aa:aa"
#define REMOTE_MAC "aa:aa:aa:aa:aa:bb"

#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"

#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010
#define IFF_NAPI_FRAGS 0x0020

static void initialize_tun(void)
{
  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;
  }
  const int kTunFd = 240;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_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)
      exit(1);
  }
  if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
    exit(1);
  tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;
  execute_command(0, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE);
  execute_command(0, "sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                  TUN_IFACE);
  execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC);
  execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE);
  execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV4, REMOTE_MAC, TUN_IFACE);
  execute_command(0, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE);
  execute_command(0, "ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV6, REMOTE_MAC, TUN_IFACE);
  execute_command(1, "ip link set dev %s up", TUN_IFACE);
}

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;
    exit(1);
  }
  return rv;
}

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

static long syz_genetlink_get_family_id(long name)
{
  char buf[512] = {0};
  struct nlmsghdr* hdr = (struct nlmsghdr*)buf;
  struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr);
  struct nlattr* attr = (struct nlattr*)(genlhdr + 1);
  hdr->nlmsg_len =
      sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ;
  hdr->nlmsg_type = GENL_ID_CTRL;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
  genlhdr->cmd = CTRL_CMD_GETFAMILY;
  attr->nla_type = CTRL_ATTR_FAMILY_NAME;
  attr->nla_len = sizeof(*attr) + GENL_NAMSIZ;
  NONFAILING(strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ));
  struct iovec iov = {hdr, hdr->nlmsg_len};
  struct sockaddr_nl addr = {0};
  addr.nl_family = AF_NETLINK;
  int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (fd == -1) {
    return -1;
  }
  struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0};
  if (sendmsg(fd, &msg, 0) == -1) {
    close(fd);
    return -1;
  }
  ssize_t n = recv(fd, buf, sizeof(buf), 0);
  close(fd);
  if (n <= 0) {
    return -1;
  }
  if (hdr->nlmsg_type != GENL_ID_CTRL) {
    return -1;
  }
  for (; (char*)attr < buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID)
      return *(uint16_t*)(attr + 1);
  }
  return -1;
}

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 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 = 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 = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

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

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_tun();
  loop();
  exit(1);
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  while (umount2(dir, MNT_DETACH) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  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, MNT_DETACH) == 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, MNT_DETACH))
        exit(1);
    }
  }
  closedir(dp);
  int i;
  for (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, MNT_DETACH))
          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);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  flush_tun();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 8; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    syscall(__NR_socket, 0x10, 3, 0x10);
    break;
  case 1:
    syz_genetlink_get_family_id(0);
    break;
  case 2:
    syscall(__NR_recvfrom, -1, 0, 0, 0, 0, 0);
    break;
  case 3:
    res = syscall(__NR_socket, 2, 3, 0xa);
    if (res != -1)
      r[0] = res;
    break;
  case 4:
    NONFAILING(memcpy((void*)0x200004c0, "nat\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x200004e0 = 0x19);
    NONFAILING(*(uint32_t*)0x200004e4 = 1);
    NONFAILING(*(uint32_t*)0x200004e8 = 0x1c0);
    NONFAILING(*(uint64_t*)0x200004f0 = 0x200002c0);
    NONFAILING(*(uint64_t*)0x200004f8 = 0);
    NONFAILING(*(uint64_t*)0x20000500 = 0);
    NONFAILING(*(uint64_t*)0x20000508 = 0x200002f0);
    NONFAILING(*(uint64_t*)0x20000510 = 0x20000320);
    NONFAILING(*(uint64_t*)0x20000518 = 0);
    NONFAILING(*(uint32_t*)0x20000520 = 0x6000000);
    NONFAILING(*(uint64_t*)0x20000528 = 0);
    NONFAILING(*(uint64_t*)0x20000530 = 0x200002c0);
    NONFAILING(*(uint32_t*)0x200002c0 = 0);
    NONFAILING(memcpy((void*)0x200002c4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x200002e4 = 0);
    NONFAILING(*(uint32_t*)0x200002e8 = -1);
    NONFAILING(*(uint32_t*)0x200002ec = 0);
    NONFAILING(*(uint32_t*)0x200002f0 = 0);
    NONFAILING(memcpy((void*)0x200002f4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x20000314 = 0);
    NONFAILING(*(uint32_t*)0x20000318 = -1);
    NONFAILING(*(uint32_t*)0x2000031c = 0);
    NONFAILING(*(uint32_t*)0x20000320 = 0);
    NONFAILING(memcpy((void*)0x20000324, "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x20000344 = 0);
    NONFAILING(*(uint32_t*)0x20000348 = -1);
    NONFAILING(*(uint32_t*)0x2000034c = 0);
    NONFAILING(*(uint32_t*)0x20000350 = 0);
    NONFAILING(memcpy((void*)0x20000354, "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x20000374 = 0);
    NONFAILING(*(uint32_t*)0x20000378 = -1);
    NONFAILING(*(uint32_t*)0x2000037c = 1);
    NONFAILING(*(uint32_t*)0x20000380 = 0x11);
    NONFAILING(*(uint32_t*)0x20000384 = 0);
    NONFAILING(*(uint16_t*)0x20000388 = htobe16(0x806));
    NONFAILING(memcpy((void*)0x2000038a,
                      "\x03\x00sf0\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00",
                      16));
    NONFAILING(memcpy((void*)0x2000039a,
                      "dummy0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16));
    NONFAILING(memcpy((void*)0x200003aa,
                      "ifb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
                      16));
    NONFAILING(memcpy(
        (void*)0x200003ba,
        "lo\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16));
    NONFAILING(*(uint8_t*)0x200003ca = -1);
    NONFAILING(*(uint8_t*)0x200003cb = -1);
    NONFAILING(*(uint8_t*)0x200003cc = -1);
    NONFAILING(*(uint8_t*)0x200003cd = -1);
    NONFAILING(*(uint8_t*)0x200003ce = -1);
    NONFAILING(*(uint8_t*)0x200003cf = -1);
    NONFAILING(*(uint8_t*)0x200003d0 = 0);
    NONFAILING(*(uint8_t*)0x200003d1 = 0);
    NONFAILING(*(uint8_t*)0x200003d2 = 0);
    NONFAILING(*(uint8_t*)0x200003d3 = 0);
    NONFAILING(*(uint8_t*)0x200003d4 = 0);
    NONFAILING(*(uint8_t*)0x200003d5 = 0);
    NONFAILING(*(uint8_t*)0x200003d6 = -1);
    NONFAILING(*(uint8_t*)0x200003d7 = -1);
    NONFAILING(*(uint8_t*)0x200003d8 = -1);
    NONFAILING(*(uint8_t*)0x200003d9 = -1);
    NONFAILING(*(uint8_t*)0x200003da = -1);
    NONFAILING(*(uint8_t*)0x200003db = -1);
    NONFAILING(*(uint8_t*)0x200003dc = 0);
    NONFAILING(*(uint8_t*)0x200003dd = 0);
    NONFAILING(*(uint8_t*)0x200003de = 0);
    NONFAILING(*(uint8_t*)0x200003df = 0);
    NONFAILING(*(uint8_t*)0x200003e0 = 0);
    NONFAILING(*(uint8_t*)0x200003e1 = 0);
    NONFAILING(*(uint32_t*)0x200003e4 = 0xd0);
    NONFAILING(*(uint32_t*)0x200003e8 = 0xd0);
    NONFAILING(*(uint32_t*)0x200003ec = 0x100);
    NONFAILING(memcpy((void*)0x200003f0, "arp\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x20000410 = 0x38);
    NONFAILING(*(uint16_t*)0x20000418 = htobe16(0));
    NONFAILING(*(uint16_t*)0x2000041a = htobe16(0));
    NONFAILING(*(uint16_t*)0x2000041c = htobe16(0));
    NONFAILING(*(uint32_t*)0x20000420 = htobe32(0xe0000001));
    NONFAILING(*(uint32_t*)0x20000424 = htobe32(0));
    NONFAILING(*(uint32_t*)0x20000428 = htobe32(0x7f000001));
    NONFAILING(*(uint32_t*)0x2000042c = htobe32(0));
    NONFAILING(*(uint8_t*)0x20000430 = 0);
    NONFAILING(*(uint8_t*)0x20000431 = 0);
    NONFAILING(*(uint8_t*)0x20000432 = 0);
    NONFAILING(*(uint8_t*)0x20000433 = 0);
    NONFAILING(*(uint8_t*)0x20000434 = 0);
    NONFAILING(*(uint8_t*)0x20000435 = 0);
    NONFAILING(*(uint8_t*)0x20000436 = 0);
    NONFAILING(*(uint8_t*)0x20000437 = 0);
    NONFAILING(*(uint8_t*)0x20000438 = 0);
    NONFAILING(*(uint8_t*)0x20000439 = 0);
    NONFAILING(*(uint8_t*)0x2000043a = 0);
    NONFAILING(*(uint8_t*)0x2000043b = 0);
    NONFAILING(*(uint8_t*)0x2000043c = 0xaa);
    NONFAILING(*(uint8_t*)0x2000043d = 0xaa);
    NONFAILING(*(uint8_t*)0x2000043e = 0xaa);
    NONFAILING(*(uint8_t*)0x2000043f = 0xaa);
    NONFAILING(*(uint8_t*)0x20000440 = 0xaa);
    NONFAILING(*(uint8_t*)0x20000441 = 0);
    NONFAILING(*(uint8_t*)0x20000442 = 0);
    NONFAILING(*(uint8_t*)0x20000443 = 0);
    NONFAILING(*(uint8_t*)0x20000444 = 0);
    NONFAILING(*(uint8_t*)0x20000445 = 0);
    NONFAILING(*(uint8_t*)0x20000446 = 0);
    NONFAILING(*(uint8_t*)0x20000447 = 0);
    NONFAILING(*(uint8_t*)0x20000448 = 0);
    NONFAILING(*(uint8_t*)0x20000449 = 0);
    NONFAILING(memcpy((void*)0x20000450, "redirect\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00",
                      32));
    NONFAILING(*(uint32_t*)0x20000470 = 8);
    NONFAILING(*(uint32_t*)0x20000478 = -1);
    syscall(__NR_setsockopt, r[0], 0, 0x80, 0x200004c0, 0x238);
    break;
  case 5:
    syscall(__NR_socket, 0x10, 3, 0x10);
    break;
  case 6:
    syscall(__NR_getsockopt, 0xffffff9c, 0x84, 0x7b, 0, 0);
    break;
  case 7:
    syscall(__NR_socket, 2, 3, 0xa);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}