// https://syzkaller.appspot.com/bug?id=853bf73c001cbfdeaf7be9bcc67bfd3655e700ea
// 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 <netinet/in.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/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/net.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);
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02hx"
#define DEV_MAC "aa:aa:aa:aa:aa:%02hx"

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);
}
static void initialize_netdevices(void)
{
  unsigned i;
  const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"};
  const char* devnames[] = {"lo",
                            "sit0",
                            "bridge0",
                            "vcan0",
                            "tunl0",
                            "gre0",
                            "gretap0",
                            "ip_vti0",
                            "ip6_vti0",
                            "ip6tnl0",
                            "ip6gre0",
                            "ip6gretap0",
                            "erspan0",
                            "bond0",
                            "veth0",
                            "veth1",
                            "team0",
                            "veth0_to_bridge",
                            "veth1_to_bridge",
                            "veth0_to_bond",
                            "veth1_to_bond",
                            "veth0_to_team",
                            "veth1_to_team"};
  const char* devmasters[] = {"bridge", "bond", "team"};
  for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
    execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
  execute_command(0, "ip link add type veth");
  for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
    execute_command(
        0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(
        0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set veth0_to_%s up", devmasters[i]);
    execute_command(0, "ip link set veth1_to_%s up", devmasters[i]);
  }
  execute_command(0, "ip link set bridge_slave_0 up");
  execute_command(0, "ip link set bridge_slave_1 up");
  for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
    char addr[32];
    snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10);
    execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10);
    execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10);
    execute_command(0, "ip link set dev %s address %s", devnames[i], addr);
    execute_command(0, "ip link set dev %s up", devnames[i]);
  }
}

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 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 XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10

struct xt_counters {
  uint64_t pcnt, bcnt;
};

struct ipt_getinfo {
  char name[32];
  unsigned int valid_hooks;
  unsigned int hook_entry[5];
  unsigned int underflow[5];
  unsigned int num_entries;
  unsigned int size;
};

struct ipt_get_entries {
  char name[32];
  unsigned int size;
  void* entrytable[XT_TABLE_SIZE / sizeof(void*)];
};

struct ipt_replace {
  char name[32];
  unsigned int valid_hooks;
  unsigned int num_entries;
  unsigned int size;
  unsigned int hook_entry[5];
  unsigned int underflow[5];
  unsigned int num_counters;
  struct xt_counters* counters;
  char entrytable[XT_TABLE_SIZE];
};

struct ipt_table_desc {
  const char* name;
  struct ipt_getinfo info;
  struct ipt_replace replace;
};

static struct ipt_table_desc ipv4_tables[] = {
    {.name = "filter"}, {.name = "nat"},      {.name = "mangle"},
    {.name = "raw"},    {.name = "security"},
};

static struct ipt_table_desc ipv6_tables[] = {
    {.name = "filter"}, {.name = "nat"},      {.name = "mangle"},
    {.name = "raw"},    {.name = "security"},
};

#define IPT_BASE_CTL 64
#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
#define IPT_SO_GET_INFO (IPT_BASE_CTL)
#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)

struct arpt_getinfo {
  char name[32];
  unsigned int valid_hooks;
  unsigned int hook_entry[3];
  unsigned int underflow[3];
  unsigned int num_entries;
  unsigned int size;
};

struct arpt_get_entries {
  char name[32];
  unsigned int size;
  void* entrytable[XT_TABLE_SIZE / sizeof(void*)];
};

struct arpt_replace {
  char name[32];
  unsigned int valid_hooks;
  unsigned int num_entries;
  unsigned int size;
  unsigned int hook_entry[3];
  unsigned int underflow[3];
  unsigned int num_counters;
  struct xt_counters* counters;
  char entrytable[XT_TABLE_SIZE];
};

struct arpt_table_desc {
  const char* name;
  struct arpt_getinfo info;
  struct arpt_replace replace;
};

static struct arpt_table_desc arpt_tables[] = {
    {.name = "filter"},
};

#define ARPT_BASE_CTL 96
#define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL)
#define ARPT_SO_GET_INFO (ARPT_BASE_CTL)
#define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1)

static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables,
                                int family, int level)
{
  struct ipt_get_entries entries;
  socklen_t optlen;
  int fd, i;
  fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < num_tables; i++) {
    struct ipt_table_desc* table = &tables[i];
    strcpy(table->info.name, table->name);
    strcpy(table->replace.name, table->name);
    optlen = sizeof(table->info);
    if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->info.size > sizeof(table->replace.entrytable))
      exit(1);
    if (table->info.num_entries > XT_MAX_ENTRIES)
      exit(1);
    memset(&entries, 0, sizeof(entries));
    strcpy(entries.name, table->name);
    entries.size = table->info.size;
    optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
    if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
      exit(1);
    table->replace.valid_hooks = table->info.valid_hooks;
    table->replace.num_entries = table->info.num_entries;
    table->replace.size = table->info.size;
    memcpy(table->replace.hook_entry, table->info.hook_entry,
           sizeof(table->replace.hook_entry));
    memcpy(table->replace.underflow, table->info.underflow,
           sizeof(table->replace.underflow));
    memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
  }
  close(fd);
}

static void reset_iptables(struct ipt_table_desc* tables, int num_tables,
                           int family, int level)
{
  struct xt_counters counters[XT_MAX_ENTRIES];
  struct ipt_get_entries entries;
  struct ipt_getinfo info;
  socklen_t optlen;
  int fd, i;
  fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < num_tables; i++) {
    struct ipt_table_desc* table = &tables[i];
    if (table->info.valid_hooks == 0)
      continue;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    optlen = sizeof(info);
    if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen))
      exit(1);
    if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
      memset(&entries, 0, sizeof(entries));
      strcpy(entries.name, table->name);
      entries.size = table->info.size;
      optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
      if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
        exit(1);
      if (memcmp(table->replace.entrytable, entries.entrytable,
                 table->info.size) == 0)
        continue;
    }
    table->replace.num_counters = info.num_entries;
    table->replace.counters = counters;
    optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
             table->replace.size;
    if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

static void checkpoint_arptables(void)
{
  struct arpt_get_entries entries;
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
    struct arpt_table_desc* table = &arpt_tables[i];
    strcpy(table->info.name, table->name);
    strcpy(table->replace.name, table->name);
    optlen = sizeof(table->info);
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->info.size > sizeof(table->replace.entrytable))
      exit(1);
    if (table->info.num_entries > XT_MAX_ENTRIES)
      exit(1);
    memset(&entries, 0, sizeof(entries));
    strcpy(entries.name, table->name);
    entries.size = table->info.size;
    optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
      exit(1);
    table->replace.valid_hooks = table->info.valid_hooks;
    table->replace.num_entries = table->info.num_entries;
    table->replace.size = table->info.size;
    memcpy(table->replace.hook_entry, table->info.hook_entry,
           sizeof(table->replace.hook_entry));
    memcpy(table->replace.underflow, table->info.underflow,
           sizeof(table->replace.underflow));
    memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
  }
  close(fd);
}

static void reset_arptables()
{
  struct xt_counters counters[XT_MAX_ENTRIES];
  struct arpt_get_entries entries;
  struct arpt_getinfo info;
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
    struct arpt_table_desc* table = &arpt_tables[i];
    if (table->info.valid_hooks == 0)
      continue;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    optlen = sizeof(info);
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen))
      exit(1);
    if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
      memset(&entries, 0, sizeof(entries));
      strcpy(entries.name, table->name);
      entries.size = table->info.size;
      optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
      if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
        exit(1);
      if (memcmp(table->replace.entrytable, entries.entrytable,
                 table->info.size) == 0)
        continue;
    } else {
    }
    table->replace.num_counters = info.num_entries;
    table->replace.counters = counters;
    optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
             table->replace.size;
    if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

#define NF_BR_NUMHOOKS 6
#define EBT_TABLE_MAXNAMELEN 32
#define EBT_CHAIN_MAXNAMELEN 32
#define EBT_BASE_CTL 128
#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
#define EBT_SO_GET_INFO (EBT_BASE_CTL)
#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1)
#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1)
#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1)

struct ebt_replace {
  char name[EBT_TABLE_MAXNAMELEN];
  unsigned int valid_hooks;
  unsigned int nentries;
  unsigned int entries_size;
  struct ebt_entries* hook_entry[NF_BR_NUMHOOKS];
  unsigned int num_counters;
  struct ebt_counter* counters;
  char* entries;
};

struct ebt_entries {
  unsigned int distinguisher;
  char name[EBT_CHAIN_MAXNAMELEN];
  unsigned int counter_offset;
  int policy;
  unsigned int nentries;
  char data[0] __attribute__((aligned(__alignof__(struct ebt_replace))));
};

struct ebt_table_desc {
  const char* name;
  struct ebt_replace replace;
  char entrytable[XT_TABLE_SIZE];
};

static struct ebt_table_desc ebt_tables[] = {
    {.name = "filter"}, {.name = "nat"}, {.name = "broute"},
};

static void checkpoint_ebtables(void)
{
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
    struct ebt_table_desc* table = &ebt_tables[i];
    strcpy(table->replace.name, table->name);
    optlen = sizeof(table->replace);
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace,
                   &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->replace.entries_size > sizeof(table->entrytable))
      exit(1);
    table->replace.num_counters = 0;
    table->replace.entries = table->entrytable;
    optlen = sizeof(table->replace) + table->replace.entries_size;
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace,
                   &optlen))
      exit(1);
  }
  close(fd);
}

static void reset_ebtables()
{
  struct ebt_replace replace;
  char entrytable[XT_TABLE_SIZE];
  socklen_t optlen;
  unsigned i, j, h;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
    struct ebt_table_desc* table = &ebt_tables[i];
    if (table->replace.valid_hooks == 0)
      continue;
    memset(&replace, 0, sizeof(replace));
    strcpy(replace.name, table->name);
    optlen = sizeof(replace);
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen))
      exit(1);
    replace.num_counters = 0;
    table->replace.entries = 0;
    for (h = 0; h < NF_BR_NUMHOOKS; h++)
      table->replace.hook_entry[h] = 0;
    if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) {
      memset(&entrytable, 0, sizeof(entrytable));
      replace.entries = entrytable;
      optlen = sizeof(replace) + replace.entries_size;
      if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen))
        exit(1);
      if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0)
        continue;
    }
    for (j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) {
      if (table->replace.valid_hooks & (1 << h)) {
        table->replace.hook_entry[h] =
            (struct ebt_entries*)table->entrytable + j;
        j++;
      }
    }
    table->replace.entries = table->entrytable;
    optlen = sizeof(table->replace) + table->replace.entries_size;
    if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

static void checkpoint_net_namespace(void)
{
  checkpoint_ebtables();
  checkpoint_arptables();
  checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
                      AF_INET, SOL_IP);
  checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
                      AF_INET6, SOL_IPV6);
}

static void reset_net_namespace(void)
{
  reset_ebtables();
  reset_arptables();
  reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
                 AF_INET, SOL_IP);
  reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
                 AF_INET6, SOL_IPV6);
}

static void setup_cgroups()
{
  if (mkdir("/syzcgroup", 0777)) {
  }
  if (mkdir("/syzcgroup/unified", 0777)) {
  }
  if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
  }
  if (chmod("/syzcgroup/unified", 0777)) {
  }
  if (!write_file("/syzcgroup/unified/cgroup.subtree_control",
                  "+cpu +memory +io +pids +rdma")) {
  }
  if (mkdir("/syzcgroup/cpu", 0777)) {
  }
  if (mount("none", "/syzcgroup/cpu", "cgroup", 0,
            "cpuset,cpuacct,perf_event,hugetlb")) {
  }
  if (!write_file("/syzcgroup/cpu/cgroup.clone_children", "1")) {
  }
  if (chmod("/syzcgroup/cpu", 0777)) {
  }
  if (mkdir("/syzcgroup/net", 0777)) {
  }
  if (mount("none", "/syzcgroup/net", "cgroup", 0,
            "net_cls,net_prio,devices,freezer")) {
  }
  if (chmod("/syzcgroup/net", 0777)) {
  }
}
static void setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) {
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:")) {
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC")) {
  }
}

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
  setup_cgroups();
  setup_binfmt_misc();
}

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();
  initialize_netdevices();
  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_LOOP 1
static void setup_loop()
{
  int pid = getpid();
  char cgroupdir[64];
  char file[128];
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/pids.max", cgroupdir);
  if (!write_file(file, "32")) {
  }
  snprintf(file, sizeof(file), "%s/memory.low", cgroupdir);
  if (!write_file(file, "%d", 298 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/memory.high", cgroupdir);
  if (!write_file(file, "%d", 299 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/memory.max", cgroupdir);
  if (!write_file(file, "%d", 300 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  if (!write_file(file, "%d", pid)) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  if (!write_file(file, "%d", pid)) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  if (!write_file(file, "%d", pid)) {
  }
  checkpoint_net_namespace();
}

#define SYZ_HAVE_RESET_LOOP 1
static void reset_loop()
{
  reset_net_namespace();
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  char cgroupdir[64];
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup")) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup.cpu")) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup.net")) {
  }
  if (!write_file("/proc/self/oom_score_adj", "1000")) {
  }
  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;
  for (call = 0; call < 7; 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);
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  setup_loop();
  int iter;
  for (iter = 0;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      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);
  }
}
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

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

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    NONFAILING(memcpy((void*)0x20000280, "[\'posix_acl_access\x00", 19));
    res = syscall(__NR_memfd_create, 0x20000280, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    NONFAILING(*(uint32_t*)0x20004240 = 8);
    NONFAILING(memcpy(
        (void*)0x20004244,
        "\xa4\x69\x5c\x53\x2a\x88\x40\xcd\x6f\xab\x54\x14\xa4\x52\x6f\x2c\x79"
        "\x70\x2a\xe7\xd3\xc6\x50\x18\x14\xb0\xf7\xc6\x41\x61\xe1\x34\x36\x4c"
        "\x38\x7e\xd3\x62\x86\x3f\x52\x9d\x09\x03\xde\xef\x78\x6d\x21\x53\x10"
        "\xea\xa4\xc1\x3c\x41\x25\x0d\xb8\x79\x4e\x3f\x0b\xf1\xbe\x5e\x5d\x1a"
        "\xac\x35\x7c\x8b\x6d\x3f\x43\xc2\x21\x9d\xe0\x7c\xd2\x21\x9a\xa3\xc3"
        "\xf2\x51\x25\x2b\x86\xeb\xd7\x58\xfd\xaf\x0e\x15\x6a\xd8\x8b\x2e\x62"
        "\x4d\x1e\x40\x53\x63\xae\xbe\x4a\xa0\xf3\x1c\xe7\xf0\xe5\x17\x06\x27"
        "\x3e\xa3\xb7\xc2\xcb\xd7\xd7\x7d\x31\x4a\x4a\xdb\x25\x48\x5c\x5e\x5b"
        "\xde\x9b\x99\x8a\xe9\x5c\x05\x81\x83\x6f\xa8\x41\xe2\x41\x74\x9c\xa8"
        "\xb5\x5b\x9c\x47\x05\xc4\xa8\x71\x4b\xd7\x16\x5f\x7d\x09\x99\xad\xb6"
        "\x58\xa9\x50\x7f\xa6\x4c\x7a\x41\xe5\x8f\xc3\x46\xdc\xa4\x57\x71\x0f"
        "\x13\xe9\x69\x9b\x0e\x17\x5c\x75\x23\xb5\x5a\xa7\x4a\x54\xe6\xcc\xcf"
        "\xb4\x63\xa2\xd6\xa8\x94\x51\xf8\x5e\xbd\x96\x2b\x04\x24\x18\xe5\xcc"
        "\x26\x6a\xbd\x4f\x41\xba\xd1\x8e\xb2\x63\x93\x79\xb5\x5a\xaf\x6e\x89"
        "\xd9\x2d\x01\xbf\xd9\x95\x27\x47\x11\xf8\xe7\x20\x94\xb4\x5a\x4b\x79"
        "\xb0\x99\x5e\x38\xb2\x8f\x66\x33\x23\x7f\x10\x5a\x7e\xc0\x50\x89\x6f"
        "\x83\x3d\xe8\x86\xc1\xd3\x1e\x3c\x14\xf4\x8b\xa1\x85\x04\x3d\x7f\x3e"
        "\xe7\x23\x1f\xbf\xd2\xcb\xd3\x1e\xf3\x45\x40\x27\xc2\x69\x40\x71\x4d"
        "\xca\x40\xc7\x4d\xda\x73\x81\x2e\xdb\x9d\x2a\xdc\x73\x54\xce\x26\x33"
        "\xae\xea\xdb\xc6\xc1\x4e\x16\x9d\x99\x4d\x7a\xc1\xb6\x80\x43\xfc\x1b"
        "\x37\x27\xb2\xf9\x67\x06\xda\x8c\x3f\x3b\x37\x71\xd5\xbe\xba\x69\x18"
        "\x8f\xca\x57\x85\x27\x85\xf4\x6c\xb3\x73\xc1\x9a\x33\x74\xd8\xc0\x41"
        "\xf9\x2a\xb3\x82\x0d\x2a\x1e\xb5\x25\x23\x7c\xce\x0f\x7a\x99\xe0\xc6"
        "\x6c\xf6\x81\xe7\xea\x95\x0e\x06\x2c\xfa\xf0\xe8\xd8\xd8\x34\xda\x04"
        "\x43\x70\x3e\xa2\xb6\x35\x68\xd2\x9c\xd2\xd7\x19\x9b\x6e\xf6\x78\x4e"
        "\x0d\xc8\xa8\x97\x98\x41\xd4\xdd\xea\x77\xb9\x98\x61\x9e\x8e\xae\x45"
        "\xa9\xea\x9b\xb1\x46\x4a\xd2\xaa\x2d\xf2\x28\xe6\x0a\x65\xb5\xe8\x3a"
        "\xd3\x69\xbc\x36\x7b\x69\xa8\x20\x7d\x8f\x09\x04\xb4\xc3\x89\xc9\x73"
        "\xec\x70\x5b\x73\xb6\x66\xe2\xf2\x98\xd1\x0f\x57\xf0\x98\xed\x0a\xf8"
        "\x10\x23\x13\x58\xdd\x15\x1e\xa5\xbc\x03\x67\x5b\xf1\xc9\xfe\x6a\xc5"
        "\x70\xad\x62\x81\x52\xc8\xa2\xb8\x57\x0d\x84\x9c\x8a\x04\x60\xb6\x17"
        "\xfa\xbd\xa4\x99\xcd\x10\xaa\x0e\x36\x6b\x83\x20\xe1\x4b\x1b\xec\x56"
        "\xc6\xa9\x61\x65\xd2\x3b\x98\x06\xc0\xc4\xf8\x6d\x2d\x46\x77\xa9\x5a"
        "\x6c\x0e\x62\x7a\xae\x99\xc2\x35\xb0\x6b\xf1\x43\x2e\x7c\x81\xdd\x82"
        "\x7e\x43\xff\xf9\xec\xd2\x4f\x75\x31\xca\x4c\xfa\xcf\x47\x8f\x66\xed"
        "\x76\x4f\xcf\x53\xd7\x73\xf4\xb9\xab\xe8\x18\x5a\x66\x1f\xdc\x97\x27"
        "\xa4\x78\xf4\x22\xa4\xbb\x1a\x7e\xde\xaf\x68\xb1\xe2\xff\xa6\x8e\x30"
        "\x68\xa7\xde\x07\x7c\xed\xc7\x55\x4d\xe7\xa9\x0d\xd2\xb2\x48\x3a\x47"
        "\x81\x4c\xc7\xbc\x85\xeb\x1a\x97\x22\x46\x77\x8d\xb8\xb3\x3b\xd5\x22"
        "\xec\x79\xae\xfa\x35\x29\xa0\x00\xc5\x8b\x57\x0b\x94\x0e\x55\xc0\x48"
        "\x43\x86\x32\x5f\x40\x97\xb1\x3b\xf3\x37\x75\x9b\x0b\xec\x93\x21\xfe"
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        "\x9f\xfb\x2f\xf3\x4e\x78\xd5\x31\x23\xe9\xc1\xae\x9e\x50\x44\x7d\x77"
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        "\xea\x76\x40\xa2\x7f\x27\xb3\xbe\xfe\xed\x4b\x86\x4b\x54\x42\xf8\x89"
        "\xb7\x69\x20\x6d\x67\x67\xb5\x81\x5a\x74\xdf\x96\x08\x24\xfb\xca\xb3"
        "\x1a\xb9\x32\x81\xdb\x2b\x65\x1a\x83\x8b\x79\x0e\x52\xfb\x4c\x2e\xd2"
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        "\x4a\xa3\xa7\x1e\xcd\x29\x55\x6f\x3a\x23\xfb\xfc\x37\x35\x90\x4c\x2c"
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        "\xc4\x5f\x53\x63\x0c\x31\x1a\xaa\xe9\xce\x45\x65\xae\xd2\x33\x9d\x95"
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        "\xda\xc7\x58\xd5\x2b\x7b\xb2\x2c\xbe\x0e\xba\xd7\x99\x00\xe9\xc7\xc4"
        "\x0c\xca\x87\x99\xcc\xa6\x6b\x35\x71\xfb\xec\xf6\x8e\x3e\xa2\xe3\x88"
        "\x0b\xc2\xcb\xed\x1a\xd1\xda\xbd\x69\x59\x3e\x1a\x96\x8d\xa4\x10\xc5"
        "\xd8\x53\x8f\xdc\x81\x99\xee\x31\x0a\x3a\x2b\x14\xc6\x42\xe3\x88\xe9"
        "\xf1\x41\x3b\xb9\x0f\x87\x6a\xa4\x78\x00\x65\x54\xa0\x1f\x6b\x0d\x41"
        "\xd2\xf5\xc8\xb7\xff\x20\xd7\xcb\x79\xaf\xd1\x3f\x6a\xb3\xf1\x33\x1a"
        "\x8d\xe1\x54\xa6\x0d\xa3\x3a\xac\x53\x10\xc1\x74\xcd\x54\xa7\x99\x85"
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        "\x5e\x79\x97\xa3\x22\xee\xc7\xa6\x59\xc4\x48\x99\xf7\xc5\x3c\x8d\x34"
        "\x77\xd3\xc3\x6f\x21\x57\x76\x20\x81\x3b\x41\x22\x3a\xab\xdc\x72\xd7"
        "\x72\xa2\xf6\x0d\xeb\x3b\x55\xbf\x1b\x5c\x14\x55\x37\x1f\x14\xb0\xad"
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        "\x5d\x1e\x45\xb0\xd6\x9c\x7f\x69\x7b\xa2\x65\x95\xbd\x30\xe8\x36\x1a"
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        "\x00\xe0\xf4\xee\xd7\xdc\x80\x78\x0d\xad\xd6\xb5\x70\xa2\xc5\xa6\xe9"
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        "\x6d\x5d\x96\x3d\x34\x52\xf7\x42\xa3\x86\x66\x1b\x16\x79\xf9\xa2\xca"
        "\xe3\xb9\xde\xbf\x35\xc0\x1a\x82\xa5\xe8\x69\xcc\x63\xaa\xbb\x11\x3f"
        "\x6a\x37\xa3\x45\x4b\x13\x41\x08\xdf\xec\x97\x5a\xc6\x19\x2b\xe9\xc6"
        "\x99\x32\x1e\xf5\x28\x0e\x82\xe1\x3a\x58\xd6\xc6\xf6\x8d\x8d\x3a\xbc"
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        "\xdb\xfa\xd3\x2d\xab\x97\x66\x87\xc4\xd7\xdf\xc4\x0d\x95\x39\x97\x16"
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        "\xec\xc3\x94\x1b\x2e\x9c\xfd\x1a\xa2\xa6\xf3\x1b\x2d\x50\x94\x20\xda"
        "\xb9\x6d\x19\xfe\x66\x27\x42\x0c\x0c\x45\x4f\x48\xb9\x26\x3d\x2a\xf2"
        "\x16\xab\x08\x58\x59\x00\x05\xd5\x74\x12\x23\x47\x55\xb7\x06\xda\x1a"
        "\x7a\x14\x5f\xce\x8e\x00\x79\x69\x69\x5d\x00\xbb\x46\x22\x70\xac\x95"
        "\xfd\x1b\x48\x36\x86\xff\x6d\xb7\xff\xe5\x76\xa8\xdf\x61\xd8\x06\x04"
        "\x44\x34\x52\x23\x6e\x27\xad\xbb\x46\xd4\xa7\x0f\x2e\x7c\xcb\xf1\x73"
        "\x5a\x9e\x9f\xce\x0f\x56\x85\x9f\xa0\x0c\x01\x17\x42\xf5\xde\xd1\xa3"
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        "\x8c\x95\x39\x5b\x8c\xe6\x18\x5f\x90\xc9\x3a\x9f\x6b\x33\xf9\x05\xb0"
        "\x3c\x20\x89\x55\x4b\xef\x29\x91\x42\x8d\x4d\x2b\x27\xe0\x01\x92\x6e"
        "\x71\x4e\xef\x50\xba\x21\xb7\xa9\xc0\x48\xcb\xf2\xd7\x25\x76\xa8\x2b"
        "\x11\x45\xf4\x0c\x9e\x8a\x2d\xd7\x96\x84\xfd\x5c\x33\x19\xa8\x07\x6b"
        "\x5f\x88\x63\x29\x30\x54\x23\x48\x24\x1e\xe0\xc0\xb7\x37\xc9\x47\x4a"
        "\x44\x48\xd2\xa7\xd1\xad\x2d\x81\xa5\xbc\xd4\x56\x65\x20\xb6\x78\xae"
        "\xdb\xb3\xc5\x4c\xdc\x7d\xd6\xd0\x3b\xb6\x0a\xf9\x51\xee\xe9\xdf\xa5"
        "\xb9\x2e\xbd\x2b\x6e\x4e\xdf\x1c\xae\x7f\xee\xe7\x5c\x90\x1b\x8f\xbe"
        "\xf1\x95\x92\x10\x76\xaa\xfc\xe7\xc3\x47\x32\xc3\xc6\x70\x93\x58\x7e"
        "\x25\x86\x0e\x94\x02\x87\x68\xb9\x8c\x19\x80\x03\x8f\xce\x54\xfb\x76"
        "\xd2\x53\x1b\x9c\x3f\x94\x56\x30\xee\x9e\xc1\xaf\xa2\xac\xba\x1e\x66"
        "\xd2\xcc\xc8\xb9\x66\xc0\x47\x0d\x55\x28\xcf\xc1\x19\xc0\xba\x14\xcf"
        "\x84\xc5\xc2\xa2\xfb\xcf\x99\x65\x7c\x3c\x73\xab\x20\xb3\x25\x47\x27"
        "\x5b\xba\x54\xd4\x5e\xaf\x49\xe8\x66\x22\x46\x7e\x82\xd1\x73\xd8\xdc"
        "\xae\xaf\x5e\xba\x2a\x24\xab\xbd\xbe\xb5\xbc\xae\x6f\xf2\x22\xd4\x9e"
        "\xff\x89\x94\xc3\x12\x97\xee\x3f\x53\xed\x05\x95\xca\x90\xaa\x63\x15"
        "\xd3\x0c\xff\xb5\xfd\xf2\x7b\xd6\x8f\x78\xff\x54\x7d\x4e\x1b\x44\x31"
        "\x61\xc1\x30\xcd\xb0\x2f\x38\xbd\x0c\x5f\xc5\xeb\x86\xdc\x8a\x7c\xd9"
        "\xc3\x95\x6d\x8a\xec\x7b\x9f\x4d\x34\x2e\xdf\xfe\xf3\xb8\x19\x65\x7f"
        "\x08\x91\xbe\x01\xb9\x74\x40\x9e\x7a\x5b\x2a\xe6\x3a\xc6\x8b\xd7\x69"
        "\x6e\x1b\x6a\xb1\xda\x8e\xe4\x8e\xe9\x55\xa3\xa1\x2d\x14\xce\x06\x7c"
        "\x9c\x3c\x8b\x75\x2e\x37\xc8\x43\xfa\x9f\x5e\x9f\x3a\x1f\xff\x75\xad"
        "\x6f\xf6\x36\x6b\x34\x46\x4a\x39\x7b\xf6\xc7\x4a\x64\x88\x91\x2f\x2b"
        "\xb8\xfb\x37\x9d\x18\x06\xa9\xa6\x35\xd9\x69\xb5\x81\x8e\xaf\x11\xb7"
        "\xcd\x73\x77\xcc\x68\x4d\x71\xf3\x74\x50\x82\xef\xa2\xf4\x9f\x64\xa0"
        "\x57\x05\x0c\x5f\x5c\x17\x1b\x93\xa6\x4d\xc9\x3b\xdf\x89\xa1\x81\xa7"
        "\x0d\x38\xda\xe0\x73\x1e\x58\x63\xc6\x27\x35\xd7\xa4\xb2\x84\x19\xab"
        "\xd2\x21\x26\xa0\x0f\xc9\xa5\xa7\x5a\x74\x69\x1c\xad\xdc\x54\xd5\x42"
        "\x6b\x81\xdf\x64\x48\xef\xeb\xc6\xb5\x10\x5c\x4d\x64\x8d\xcc\x23\xae"
        "\x4f\x9e\xc7\x61\x1a\xae\xf8\x03\x0e\xa4\x4d\x38\x95\x2d\xd9\xcb\x32"
        "\xdd\xb4\x84\xd3\xcd\x4e\x6b\x01\x74\xc5\x8f\xd7\x28\x83\x52\xf1\x63"
        "\x9f\x78\xf2\xfd\x21\x13\x52\x34\x62\xc4\x99\x9a\x92\xe5\xd9\xe0\xea"
        "\x15\x41\xc3\xff\x9b\x74\x9b\x5a\x37\x68\x7f\x04\x99\xb1\xa1\x3f\xb2"
        "\x59\x0f\x7c\x76\xa1\x57\x3f\x67\x3a\xd8\x50\x38\x45\x25\x7c\x58\x8c"
        "\x30\x49\x35\x0e\x97\xed\x93\xe2\x43\x12\xff\x82\x62\x0d\x42\xf7\x22"
        "\x9c\x4a\xc1\x09\x42\x03\xe0\xb2\x02\x2e\x9a\x61\x73\xd0\x00\xe7\x64"
        "\x4f\x86\x7b\xfb\x7a\x14\x2d\x4f\xc2\xe3\x5a\x54\xde\x4e\x9e\x23\x51"
        "\x6c\xc5\xcd\xce\x02\x7b\x62\xef\x24\xfc\x32\xcd\x10\x89\x0e\x4f\x2f"
        "\xcf\x26\xa0\xf7\xb4\x00\x39\x22\x5f\xf1\x9f\xf3\x5b\xa9\x7d\x9e\xcd"
        "\xb6\xe6\xd2\xcd\x21\x16\x63\xdc\xc0\xde\xe1\xd4\x14\x09\xf2\xd8\x41"
        "\x0b\xf0\xbc\x9c\xeb\x49\x0d\x29\x2a\x3d\x97\xcc\x34\xeb\xc6\x47\x35"
        "\x4d\x84\x87\xb2\x1c\x30\x6e\x80\xb4\x5d\xc5\x78\x16\x92\x4f\xee\x5e"
        "\x24\xe3\x09\x15\x96\x7e\x18\xa9\x52\xb0\x07\xda\x91\xd2\x70\xaf\x88"
        "\xfa\xb2\x3d\xd4\x20\xfd\xb1\x02\x38\x75\x03\x28\x0d\x43\x6f\x64\x4c"
        "\xed\x68\x68\xa2\xab\x7a\xb2\xb1\x37\x49\x69\xdb\x72\xea\x9c\x61\x26"
        "\x36\xb8\x58\x54\x7a\x9b\xb1\x87\xd2\x63\x9f\xc3\x0b\xe9\x48\x76\x0b"
        "\xc6\x34\xe5\x72\x71\x8e\xfd\x0d\xad\x2f\xe4\xf6\xaa\xf4\x4b\x0c\x58"
        "\x23\xe6\x85\x47\x26\xf1\xd4\x6b\xf4\x1d\xd8\x69\x1e\x58\xa7\x7b\xdc"
        "\xb9\xaf\xa6\x3f\x3b\x0e\x1f\xbb\x0e\x5c\xaf\xa7\x60\x54\x06\x76\x9d"
        "\x62\xa3\xf7\xe3\x99\xe7\xd6\xc1\x38\xad\xb0\x2d\xe7\xf4\x84\x37\x83"
        "\xb0\xdc\x06\xf4\xc4\x53\x9b\x02\xd5\x65\xe7\x9e\x81\xeb\xa2\x06\x09"
        "\xba\x8a\x89\x14\xf7\x48\x99\xab\x42\xac\x92\xb0\x35\x80\xcf\xb5\xe4"
        "\x57\xca\x5d\x0b\x74\x7a\x69\xab\x9e\xdd\x27\x8c\xb5\x9f\x7e\x6b\xd3"
        "\x81\xa4\x83\xd9\x2d\xc8\x66\xe9\xcc\xaf\x78\x0b\x91\xa6\xf6\x99\x3b"
        "\xab\x6f\x73\xd5\x25\x93\xfe\x2c\xda\x79\x56\x1f\xfb\xed\x67\x7f\x57"
        "\x42\xf7\x84\x4d\x28\x4c\xfd\x9d\xa3\x4c\xb6\x4b\x42\x30\x73\xa4\xb3"
        "\xcf\xf0\x7f\xa6\xf1\x8e\xea\x3a\x3e\xf8\x43\x14\x68\x70\x76\x3c\x76"
        "\x6d\x16\xc7\x82\x51\x7a\xcf\xa8\x9f\xb3\xd2\x73\xe7\x0d\xc8\xba\x22"
        "\xa5\x6f\x1d\x84\x0c\x5d\xc8\x7c\x31\xe4\xdf\x33\x93\x8c\x0a\x0d\xc7"
        "\x8e\xa3\x58\x72\xae\x89\xb2\x32\x90\xe7\x86\xba\xf5\x81\xba\x3b\xcd"
        "\x99\x5e\x5b\xdd\xf2\x2e\x6a\x54\xa6\xd6\xae\x09\x32\x78\xf6\xfb\xbd"
        "\x3e\x51\x4c\xfe\xa1\x44\xd6\x90\x10\x73\xe5\x47\xd1\x43\xc3\x29\xea"
        "\x2a\x1f\x97\xab\x9a\xa7\x66\xa2\xc0\x32\x48\x90\xc8\xcb\x1a\xec\x1b"
        "\x21\xc8\x8e\xdf\xbb\x8f\x0d\x81\x48\x48\xf3\x1b\xd4\xa0\x37\x0c\xc3"
        "\xcb\xa4\x76\x5c\x50\x97\x5c\x83\x49\xda\x80\x5d\xf6\xfe\x1b\x67\x90"
        "\x4b\x5a\xa7\x06\x87\xe6\x1f\x6b\xef\x11\x79\xe3\x0a\x9b\x79\x57\x04"
        "\xd1\x1b\xdd\x7a\xba\x53\x2b\xc4\x85\x28\x57\x4a\x3d\xfa\xdd\x9f\x28"
        "\x1c\x0c\xbf\xec\xd9\x91\xe3\x2c\x90\x1b\x8d\x7c\xc5\x77\x44\xce\x51"
        "\x58\xf2\x25\x94\x73\xf3\x7e\x02\x5c\x3f\x1d\xda\xe6\xc5\x1c\xf5\x0c"
        "\x2b\xc1\x0b\xbd\xb1\x7d\x01\xac\x0f\x48\x07\x04\x3c\xda\xdb\x05\x30"
        "\x28\x3e\x52\xb6\xe8\x25\x16\x60\x3a\x1d\x70\x79\xbb\x45\xae\x71\xc1"
        "\x5b\x23\xa9\x87\x7b\xc2\xae\x70\x6d\xa4\x33\x1b\x9a\xc9\xab\x6e\x1e"
        "\xc8\xfd\x40\x41\x89\x4c\xe2\xc9\x89\xdc\x1c\x95\x80\x2e\x3d\x44\x3f"
        "\xf2\xcf\x05\xec\x7e\x83\x48\xdf\x32\xae\x02\x02\x42\x0d\xad\xbf\x6e"
        "\x23\xde\x91\x7c\x76\xab\x51\x24\x26\xaf\x82\xad\xea\x7a\x5f\xd7\x2f"
        "\xde\xf2\x80\x18\x51\x90\x5e\xc7\x3b\x83\xbf\xc8\xc6\xe6\x3e\x57\x26"
        "\x16\xa6\x87\x85\x1b\x8a\xfa\x9e\x3f\x6c\x1e\xe3\x57\xb6\xff\xa9\x17"
        "\xee\xac\xd1\x00\x5c\x67\xbc\xed\x23\x5f\x61\x43\x6c\xb4\x4d\xd9\xbf"
        "\x68\x42\xc8\xea\x5b\xa2\x81\xf7\x75\x31\xe1\xd0\x8a\x7a\x09\xef\x0c"
        "\x19\xd2\xca\xc6\x55\xbf\xb8\x1a\xc4\xb7\xad\x40\x08\x3d\x09\xd9\xb8"
        "\x3e\x7d\x56\xad\xa5\xb9\x72\xcf\x6e\xe5\x3c\xa6\x93\xaf\x57\x6f\xe2"
        "\x2c\xfd\xe1\x79\x69\x27\xaa\x2b\x54\x37\x88\x84\xa9\x3e\x80\xec\xc9"
        "\x92\xcf\x29\x8b\xa9\x9e\x4a\xd5\xb9\xd1\x35\xaf\x6e\x23\x7f\x24\xc5"
        "\x19\xf0\x78\xb3\x0a\xb1\xfa\x02\x84\x38\x97\x69\x35\x75\x1d\x84\x0a"
        "\x60\x78\xad\x33\xf1\x22\x9a\xdf\x56\x63\xb5\xba\x3c\x8a\xbc\xff\x8f"
        "\xf3\x01\x83\x44\x6a\x62\xaa\xe8\xa0\x93\x7f\x8b\xb4\x18\xe0\xd0\xc9"
        "\x84\xc4\x41\x27\x1c\xcf\xc3\x98\x4c\xdc\x23\x79\x33\x46\xcf\xc3\x68"
        "\x09\xf5\xce\xec\x33\x0e\x73\xe4\xf1\x3d\x5a\x17\x72\x65\x26\xb6\xe3"
        "\x99\x31\xa8\xde\x1f\xb1\xd9\x98\x68\x07\x47\xf0\x17\x24\xb1\x17\x71"
        "\x07\x59\xb9\xd2\x9b\xf6\x8f\xda\x85\x29\x47\x3e\xae\xb2\x81\x82\xe5"
        "\x02\x22\x0a\x6b\xf5\xcd\xca\x4c\x11\x8d\x2e\xda\xef\xe1\xff\xac\x00"
        "\x7b\xdb\x8f\x24\x64\x07\xdb\xa1\xf7\xae\x27\x72\x98\xb7\x65\xe4\x48"
        "\xb5\x01\xe1\xc5\x7e\x5f\x9e\x62\x0f\xb6\xa8\x94\x50\x6d\x7e\x81\xfa"
        "\x92\xbd\x55\x71\xb3\x2e\xda\xa3\xfb\xeb\x1a\x84\xe9\xdb\xd2\xd2\xe6"
        "\x1d\x31\xbf\xfa\xce\x3a\xd6\x15\x83\x7f\x3f\xa9\x5f\x2e\xd3\x7c\x9e"
        "\x96\xcc\x04\x5b\xae\xdb\x79\xad\x9c\x7f\xf3\x7b\xd9\x67\x98\xe6\xcc"
        "\xe6\xa8\xd2\xfc\x84\x53\xc3\xa4\x48\x65\xe1\xfa\xe5\xe5\xfb\x55\x11"
        "\x26\x03\x8e\xf2\xed\x4f\x6f\x7b\x6e\x18\x60\x72\xae\xc9\xd6\x2b\x86"
        "\x70\xf9\x72\xea\xbd\xf1\x2f\x13\xa1\xd3\xbe\x51\xd0\x37\xb2\x5e\xe0"
        "\x55\x27\x72\xc1\xfc\xfe\xcc\xcf\xa2\xbb\x44\x5a\x34\xda\xeb\x79\xd4"
        "\xa1\xbc\xfb\xf7\x0e\x71\x80\x91\xdd\x72\xca\x46\x06\x97\x31\xc3\x87"
        "\x75\x13\x6d\x72\x56\xe4\x45\xb5\x84\x19\xea\x84\x5d\xd0\xf6\x5a\x8a"
        "\x1d\xaf\x88\xc7\x50\x73\x1a\x00\x92\x29\x7c\x4c\x96\x40\x05\xbc\x9c"
        "\xf9\xec\x21\x5f\x07\xc1\x8a\x39\x5b\x35\x0c\xab\x70\x65\x8b\xbb",
        4096));
    NONFAILING(*(uint16_t*)0x20005244 = 0xfdd1);
    syscall(__NR_write, r[0], 0x20004240, 0xfffffe48);
    break;
  case 2:
    NONFAILING(memcpy((void*)0x20000100, "/dev/ashmem\x00", 12));
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0x800, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    syscall(__NR_ioctl, r[1], 0x40087703, 0x20010002);
    break;
  case 4:
    syscall(__NR_mmap, 0x20ffb000, 0x1000, 0, 0x400000000202012, r[1], 0);
    break;
  case 5:
    NONFAILING(memcpy((void*)0x20000000, "\x00", 1));
    syscall(__NR_ioctl, r[1], 0x40087708, 0x20000000);
    break;
  case 6:
    syscall(__NR_ioctl, r[1], 0x770a, 0);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}