// https://syzkaller.appspot.com/bug?id=14177cd007e876c70445b10912cfab974e43657c
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <arpa/inet.h>
#include <endian.h>
#include <errno.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 <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/uio.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <stdint.h>
#include <string.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);
}

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

struct csum_inet {
  uint32_t acc;
};

static void csum_inet_init(struct csum_inet* csum)
{
  csum->acc = 0;
}

static void csum_inet_update(struct csum_inet* csum, const uint8_t* data,
                             size_t length)
{
  if (length == 0)
    return;

  size_t i;
  for (i = 0; i < length - 1; i += 2)
    csum->acc += *(uint16_t*)&data[i];

  if (length & 1)
    csum->acc += (uint16_t)data[length - 1];

  while (csum->acc > 0xffff)
    csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16);
}

static uint16_t csum_inet_digest(struct csum_inet* csum)
{
  return ~csum->acc;
}

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(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);
  rv = system(command);
  if (panic && 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:%02hx:aa"
#define REMOTE_MAC "aa:aa:aa:aa:%02hx:bb"

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

#define LOCAL_IPV6 "fe80::%02hx:aa"
#define REMOTE_IPV6 "fe80::%02hx:bb"

#define IFF_NAPI 0x0010
#define IFF_NAPI_FRAGS 0x0020

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

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

  execute_command(1, "sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                  iface);

  execute_command(1, "ip link set dev %s address %s", iface, local_mac);
  execute_command(1, "ip addr add %s/24 dev %s", local_ipv4, iface);
  execute_command(1, "ip -6 addr add %s/120 dev %s", local_ipv6, iface);
  execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv4, remote_mac, iface);
  execute_command(1, "ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv6, remote_mac, iface);
  execute_command(1, "ip link set dev %s up", iface);
}

#define DEV_IPV4 "172.20.%d.%d"
#define DEV_IPV6 "fe80::%02hx:%02hx"
#define DEV_MAC "aa:aa:aa:aa:%02hx:%02hx"

static void initialize_netdevices(int id)
{
  unsigned i;
  const char* devtypes[] = {"ip6gretap", "bridge", "vcan"};
  const char* devnames[] = {"lo",       "sit0",    "bridge0", "vcan0",
                            "tunl0",    "gre0",    "gretap0", "ip_vti0",
                            "ip6_vti0", "ip6tnl0", "ip6gre0", "ip6gretap0",
                            "erspan0"};

  for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
    execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
  for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
    char addr[ADDR_MAX_LEN];
    snprintf_check(addr, sizeof(addr), DEV_IPV4, id, id + 10);
    execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_IPV6, id, id + 10);
    execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_MAC, id, id + 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 void setup_tun(uint64_t pid, bool enable_tun)
{
  if (enable_tun) {
    initialize_tun(pid);
    initialize_netdevices(pid);
  }
}

#define MAX_FRAGS 4
struct vnet_fragmentation {
  uint32_t full;
  uint32_t count;
  uint32_t frags[MAX_FRAGS];
};

static uintptr_t syz_emit_ethernet(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (tunfd < 0)
    return (uintptr_t)-1;

  uint32_t length = a0;
  char* data = (char*)a1;

  struct vnet_fragmentation* frags = (struct vnet_fragmentation*)a2;
  struct iovec vecs[MAX_FRAGS + 1];
  uint32_t nfrags = 0;
  if (!tun_frags_enabled || frags == NULL) {
    vecs[nfrags].iov_base = data;
    vecs[nfrags].iov_len = length;
    nfrags++;
  } else {
    bool full = true;
    uint32_t i, count = 0;
    full = frags->full;
    count = frags->count;
    if (count > MAX_FRAGS)
      count = MAX_FRAGS;
    for (i = 0; i < count && length != 0; i++) {
      uint32_t size = 0;
      size = frags->frags[i];
      if (size > length)
        size = length;
      vecs[nfrags].iov_base = data;
      vecs[nfrags].iov_len = size;
      nfrags++;
      data += size;
      length -= size;
    }
    if (length != 0 && (full || nfrags == 0)) {
      vecs[nfrags].iov_base = data;
      vecs[nfrags].iov_len = length;
      nfrags++;
    }
  }
  return writev(tunfd, vecs, nfrags);
}

static void test();

void loop()
{
  while (1) {
    test();
  }
}

long r[1];
void test()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_socket, 0xa, 2, 0);
  memcpy((void*)0x20000040, "\x66\x69\x6c\x74\x65\x72\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x55\x05\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00",
         32);
  *(uint32_t*)0x20000060 = 0xe;
  *(uint32_t*)0x20000064 = 4;
  *(uint32_t*)0x20000068 = 0x378;
  *(uint32_t*)0x2000006c = -1;
  *(uint32_t*)0x20000070 = 0;
  *(uint32_t*)0x20000074 = 0x1a0;
  *(uint32_t*)0x20000078 = 0;
  *(uint32_t*)0x2000007c = -1;
  *(uint32_t*)0x20000080 = -1;
  *(uint32_t*)0x20000084 = 0x2a8;
  *(uint32_t*)0x20000088 = 0x2a8;
  *(uint32_t*)0x2000008c = 0x2a8;
  *(uint32_t*)0x20000090 = -1;
  *(uint32_t*)0x20000094 = 4;
  *(uint64_t*)0x20000098 = 0x20000000;
  *(uint8_t*)0x200000a0 = 0xfe;
  *(uint8_t*)0x200000a1 = 0x80;
  *(uint8_t*)0x200000a2 = 0;
  *(uint8_t*)0x200000a3 = 0;
  *(uint8_t*)0x200000a4 = 0;
  *(uint8_t*)0x200000a5 = 0;
  *(uint8_t*)0x200000a6 = 0;
  *(uint8_t*)0x200000a7 = 0;
  *(uint8_t*)0x200000a8 = 0;
  *(uint8_t*)0x200000a9 = 0;
  *(uint8_t*)0x200000aa = 0;
  *(uint8_t*)0x200000ab = 0;
  *(uint8_t*)0x200000ac = 0;
  *(uint8_t*)0x200000ad = 0;
  *(uint8_t*)0x200000ae = 0;
  *(uint8_t*)0x200000af = 0xaa;
  *(uint8_t*)0x200000b0 = 0;
  *(uint8_t*)0x200000b1 = 0;
  *(uint8_t*)0x200000b2 = 0;
  *(uint8_t*)0x200000b3 = 0;
  *(uint8_t*)0x200000b4 = 0;
  *(uint8_t*)0x200000b5 = 0;
  *(uint8_t*)0x200000b6 = 0;
  *(uint8_t*)0x200000b7 = 0;
  *(uint8_t*)0x200000b8 = 0;
  *(uint8_t*)0x200000b9 = 0;
  *(uint8_t*)0x200000ba = -1;
  *(uint8_t*)0x200000bb = -1;
  *(uint32_t*)0x200000bc = htobe32(0);
  *(uint32_t*)0x200000c0 = htobe32(0);
  *(uint32_t*)0x200000c4 = htobe32(0);
  *(uint32_t*)0x200000c8 = htobe32(0);
  *(uint32_t*)0x200000cc = htobe32(0);
  *(uint32_t*)0x200000d0 = htobe32(0);
  *(uint32_t*)0x200000d4 = htobe32(0);
  *(uint32_t*)0x200000d8 = htobe32(0);
  *(uint32_t*)0x200000dc = htobe32(0);
  memcpy((void*)0x200000e0,
         "\x65\x72\x73\x70\x61\x6e\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         16);
  *(uint8_t*)0x200000f0 = 0x73;
  *(uint8_t*)0x200000f1 = 0x79;
  *(uint8_t*)0x200000f2 = 0x7a;
  *(uint8_t*)0x200000f3 = 0;
  *(uint8_t*)0x200000f4 = 0;
  *(uint8_t*)0x20000100 = 0;
  *(uint8_t*)0x20000101 = 0;
  *(uint8_t*)0x20000102 = 0;
  *(uint8_t*)0x20000103 = 0;
  *(uint8_t*)0x20000104 = 0;
  *(uint8_t*)0x20000105 = 0;
  *(uint8_t*)0x20000106 = 0;
  *(uint8_t*)0x20000107 = 0;
  *(uint8_t*)0x20000108 = 0;
  *(uint8_t*)0x20000109 = 0;
  *(uint8_t*)0x2000010a = 0;
  *(uint8_t*)0x2000010b = 0;
  *(uint8_t*)0x2000010c = 0;
  *(uint8_t*)0x2000010d = 0;
  *(uint8_t*)0x2000010e = 0;
  *(uint8_t*)0x2000010f = 0;
  *(uint8_t*)0x20000110 = 0;
  *(uint8_t*)0x20000111 = 0;
  *(uint8_t*)0x20000112 = 0;
  *(uint8_t*)0x20000113 = 0;
  *(uint8_t*)0x20000114 = 0;
  *(uint8_t*)0x20000115 = 0;
  *(uint8_t*)0x20000116 = 0;
  *(uint8_t*)0x20000117 = 0;
  *(uint8_t*)0x20000118 = 0;
  *(uint8_t*)0x20000119 = 0;
  *(uint8_t*)0x2000011a = 0;
  *(uint8_t*)0x2000011b = 0;
  *(uint8_t*)0x2000011c = 0;
  *(uint8_t*)0x2000011d = 0;
  *(uint8_t*)0x2000011e = 0;
  *(uint8_t*)0x2000011f = 0;
  *(uint16_t*)0x20000120 = 0;
  *(uint8_t*)0x20000122 = 0;
  *(uint8_t*)0x20000123 = 0;
  *(uint8_t*)0x20000124 = 0;
  *(uint32_t*)0x20000128 = 0;
  *(uint16_t*)0x2000012c = 0xa8;
  *(uint16_t*)0x2000012e = 0xd0;
  *(uint32_t*)0x20000130 = 0;
  *(uint64_t*)0x20000138 = 0;
  *(uint64_t*)0x20000140 = 0;
  *(uint16_t*)0x20000148 = 0x28;
  memcpy((void*)0x2000014a, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20000167 = 0;
  *(uint32_t*)0x20000168 = 0x1a0;
  *(uint8_t*)0x20000170 = 0;
  *(uint8_t*)0x20000171 = 0;
  *(uint8_t*)0x20000172 = 0;
  *(uint8_t*)0x20000173 = 0;
  *(uint8_t*)0x20000174 = 0;
  *(uint8_t*)0x20000175 = 0;
  *(uint8_t*)0x20000176 = 0;
  *(uint8_t*)0x20000177 = 0;
  *(uint8_t*)0x20000178 = 0;
  *(uint8_t*)0x20000179 = 0;
  *(uint8_t*)0x2000017a = 0;
  *(uint8_t*)0x2000017b = 0;
  *(uint8_t*)0x2000017c = 0;
  *(uint8_t*)0x2000017d = 0;
  *(uint8_t*)0x2000017e = 0;
  *(uint8_t*)0x2000017f = 0;
  *(uint8_t*)0x20000180 = 0;
  *(uint8_t*)0x20000181 = 0;
  *(uint8_t*)0x20000182 = 0;
  *(uint8_t*)0x20000183 = 0;
  *(uint8_t*)0x20000184 = 0;
  *(uint8_t*)0x20000185 = 0;
  *(uint8_t*)0x20000186 = 0;
  *(uint8_t*)0x20000187 = 0;
  *(uint8_t*)0x20000188 = 0;
  *(uint8_t*)0x20000189 = 0;
  *(uint8_t*)0x2000018a = 0;
  *(uint8_t*)0x2000018b = 0;
  *(uint8_t*)0x2000018c = 0;
  *(uint8_t*)0x2000018d = 0;
  *(uint8_t*)0x2000018e = 0;
  *(uint8_t*)0x2000018f = 0;
  *(uint8_t*)0x20000190 = 0;
  *(uint8_t*)0x20000191 = 0;
  *(uint8_t*)0x20000192 = 0;
  *(uint8_t*)0x20000193 = 0;
  *(uint8_t*)0x20000194 = 0;
  *(uint8_t*)0x20000195 = 0;
  *(uint8_t*)0x20000196 = 0;
  *(uint8_t*)0x20000197 = 0;
  *(uint8_t*)0x20000198 = 0;
  *(uint8_t*)0x20000199 = 0;
  *(uint8_t*)0x2000019a = 0;
  *(uint8_t*)0x2000019b = 0;
  *(uint8_t*)0x2000019c = 0;
  *(uint8_t*)0x2000019d = 0;
  *(uint8_t*)0x2000019e = 0;
  *(uint8_t*)0x2000019f = 0;
  *(uint8_t*)0x200001a0 = 0;
  *(uint8_t*)0x200001a1 = 0;
  *(uint8_t*)0x200001a2 = 0;
  *(uint8_t*)0x200001a3 = 0;
  *(uint8_t*)0x200001a4 = 0;
  *(uint8_t*)0x200001a5 = 0;
  *(uint8_t*)0x200001a6 = 0;
  *(uint8_t*)0x200001a7 = 0;
  *(uint8_t*)0x200001a8 = 0;
  *(uint8_t*)0x200001a9 = 0;
  *(uint8_t*)0x200001aa = 0;
  *(uint8_t*)0x200001ab = 0;
  *(uint8_t*)0x200001ac = 0;
  *(uint8_t*)0x200001ad = 0;
  *(uint8_t*)0x200001ae = 0;
  *(uint8_t*)0x200001af = 0;
  *(uint8_t*)0x200001b0 = 0;
  *(uint8_t*)0x200001b1 = 0;
  *(uint8_t*)0x200001b2 = 0;
  *(uint8_t*)0x200001b3 = 0;
  *(uint8_t*)0x200001b4 = 0;
  *(uint8_t*)0x200001b5 = 0;
  *(uint8_t*)0x200001b6 = 0;
  *(uint8_t*)0x200001b7 = 0;
  *(uint8_t*)0x200001b8 = 0;
  *(uint8_t*)0x200001b9 = 0;
  *(uint8_t*)0x200001ba = 0;
  *(uint8_t*)0x200001bb = 0;
  *(uint8_t*)0x200001bc = 0;
  *(uint8_t*)0x200001bd = 0;
  *(uint8_t*)0x200001be = 0;
  *(uint8_t*)0x200001bf = 0;
  *(uint8_t*)0x200001c0 = 0;
  *(uint8_t*)0x200001c1 = 0;
  *(uint8_t*)0x200001c2 = 0;
  *(uint8_t*)0x200001c3 = 0;
  *(uint8_t*)0x200001c4 = 0;
  *(uint8_t*)0x200001c5 = 0;
  *(uint8_t*)0x200001c6 = 0;
  *(uint8_t*)0x200001c7 = 0;
  *(uint8_t*)0x200001c8 = 0;
  *(uint8_t*)0x200001c9 = 0;
  *(uint8_t*)0x200001ca = 0;
  *(uint8_t*)0x200001cb = 0;
  *(uint8_t*)0x200001cc = 0;
  *(uint8_t*)0x200001cd = 0;
  *(uint8_t*)0x200001ce = 0;
  *(uint8_t*)0x200001cf = 0;
  *(uint8_t*)0x200001d0 = 0;
  *(uint8_t*)0x200001d1 = 0;
  *(uint8_t*)0x200001d2 = 0;
  *(uint8_t*)0x200001d3 = 0;
  *(uint8_t*)0x200001d4 = 0;
  *(uint8_t*)0x200001d5 = 0;
  *(uint8_t*)0x200001d6 = 0;
  *(uint8_t*)0x200001d7 = 0;
  *(uint8_t*)0x200001d8 = 0;
  *(uint8_t*)0x200001d9 = 0;
  *(uint8_t*)0x200001da = 0;
  *(uint8_t*)0x200001db = 0;
  *(uint8_t*)0x200001dc = 0;
  *(uint8_t*)0x200001dd = 0;
  *(uint8_t*)0x200001de = 0;
  *(uint8_t*)0x200001df = 0;
  *(uint8_t*)0x200001e0 = 0;
  *(uint8_t*)0x200001e1 = 0;
  *(uint8_t*)0x200001e2 = 0;
  *(uint8_t*)0x200001e3 = 0;
  *(uint8_t*)0x200001e4 = 0;
  *(uint8_t*)0x200001e5 = 0;
  *(uint8_t*)0x200001e6 = 0;
  *(uint8_t*)0x200001e7 = 0;
  *(uint8_t*)0x200001e8 = 0;
  *(uint8_t*)0x200001e9 = 0;
  *(uint8_t*)0x200001ea = 0;
  *(uint8_t*)0x200001eb = 0;
  *(uint8_t*)0x200001ec = 0;
  *(uint8_t*)0x200001ed = 0;
  *(uint8_t*)0x200001ee = 0;
  *(uint8_t*)0x200001ef = 0;
  *(uint8_t*)0x200001f0 = 0;
  *(uint8_t*)0x200001f1 = 0;
  *(uint8_t*)0x200001f2 = 0;
  *(uint8_t*)0x200001f3 = 0;
  *(uint8_t*)0x200001f4 = 0;
  *(uint8_t*)0x200001f5 = 0;
  *(uint8_t*)0x200001f6 = 0;
  *(uint8_t*)0x200001f7 = 0;
  *(uint32_t*)0x200001f8 = 0;
  *(uint16_t*)0x200001fc = 0xa8;
  *(uint16_t*)0x200001fe = 0xd0;
  *(uint32_t*)0x20000200 = 0;
  *(uint64_t*)0x20000208 = 0;
  *(uint64_t*)0x20000210 = 0;
  *(uint16_t*)0x20000218 = 0x28;
  memcpy((void*)0x2000021a, "\x52\x45\x4a\x45\x43\x54\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20000237 = 0;
  *(uint32_t*)0x20000238 = 0;
  *(uint8_t*)0x20000240 = 0;
  *(uint8_t*)0x20000241 = 0;
  *(uint8_t*)0x20000242 = 0;
  *(uint8_t*)0x20000243 = 0;
  *(uint8_t*)0x20000244 = 0;
  *(uint8_t*)0x20000245 = 0;
  *(uint8_t*)0x20000246 = 0;
  *(uint8_t*)0x20000247 = 0;
  *(uint8_t*)0x20000248 = 0;
  *(uint8_t*)0x20000249 = 0;
  *(uint8_t*)0x2000024a = 0;
  *(uint8_t*)0x2000024b = 0;
  *(uint8_t*)0x2000024c = 0;
  *(uint8_t*)0x2000024d = 0;
  *(uint8_t*)0x2000024e = 0;
  *(uint8_t*)0x2000024f = 0;
  *(uint8_t*)0x20000250 = 0;
  *(uint8_t*)0x20000251 = 0;
  *(uint8_t*)0x20000252 = 0;
  *(uint8_t*)0x20000253 = 0;
  *(uint8_t*)0x20000254 = 0;
  *(uint8_t*)0x20000255 = 0;
  *(uint8_t*)0x20000256 = 0;
  *(uint8_t*)0x20000257 = 0;
  *(uint8_t*)0x20000258 = 0;
  *(uint8_t*)0x20000259 = 0;
  *(uint8_t*)0x2000025a = 0;
  *(uint8_t*)0x2000025b = 0;
  *(uint8_t*)0x2000025c = 0;
  *(uint8_t*)0x2000025d = 0;
  *(uint8_t*)0x2000025e = 0;
  *(uint8_t*)0x2000025f = 0;
  *(uint8_t*)0x20000260 = 0;
  *(uint8_t*)0x20000261 = 0;
  *(uint8_t*)0x20000262 = 0;
  *(uint8_t*)0x20000263 = 0;
  *(uint8_t*)0x20000264 = 0;
  *(uint8_t*)0x20000265 = 0;
  *(uint8_t*)0x20000266 = 0;
  *(uint8_t*)0x20000267 = 0;
  *(uint8_t*)0x20000268 = 0;
  *(uint8_t*)0x20000269 = 0;
  *(uint8_t*)0x2000026a = 0;
  *(uint8_t*)0x2000026b = 0;
  *(uint8_t*)0x2000026c = 0;
  *(uint8_t*)0x2000026d = 0;
  *(uint8_t*)0x2000026e = 0;
  *(uint8_t*)0x2000026f = 0;
  *(uint8_t*)0x20000270 = 0;
  *(uint8_t*)0x20000271 = 0;
  *(uint8_t*)0x20000272 = 0;
  *(uint8_t*)0x20000273 = 0;
  *(uint8_t*)0x20000274 = 0;
  *(uint8_t*)0x20000275 = 0;
  *(uint8_t*)0x20000276 = 0;
  *(uint8_t*)0x20000277 = 0;
  *(uint8_t*)0x20000278 = 0;
  *(uint8_t*)0x20000279 = 0;
  *(uint8_t*)0x2000027a = 0;
  *(uint8_t*)0x2000027b = 0;
  *(uint8_t*)0x2000027c = 0;
  *(uint8_t*)0x2000027d = 0;
  *(uint8_t*)0x2000027e = 0;
  *(uint8_t*)0x2000027f = 0;
  *(uint8_t*)0x20000280 = 0;
  *(uint8_t*)0x20000281 = 0;
  *(uint8_t*)0x20000282 = 0;
  *(uint8_t*)0x20000283 = 0;
  *(uint8_t*)0x20000284 = 0;
  *(uint8_t*)0x20000285 = 0;
  *(uint8_t*)0x20000286 = 0;
  *(uint8_t*)0x20000287 = 0;
  *(uint8_t*)0x20000288 = 0;
  *(uint8_t*)0x20000289 = 0;
  *(uint8_t*)0x2000028a = 0;
  *(uint8_t*)0x2000028b = 0;
  *(uint8_t*)0x2000028c = 0;
  *(uint8_t*)0x2000028d = 0;
  *(uint8_t*)0x2000028e = 0;
  *(uint8_t*)0x2000028f = 0;
  *(uint8_t*)0x20000290 = 0;
  *(uint8_t*)0x20000291 = 0;
  *(uint8_t*)0x20000292 = 0;
  *(uint8_t*)0x20000293 = 0;
  *(uint8_t*)0x20000294 = 0;
  *(uint8_t*)0x20000295 = 0;
  *(uint8_t*)0x20000296 = 0;
  *(uint8_t*)0x20000297 = 0;
  *(uint8_t*)0x20000298 = 0;
  *(uint8_t*)0x20000299 = 0;
  *(uint8_t*)0x2000029a = 0;
  *(uint8_t*)0x2000029b = 0;
  *(uint8_t*)0x2000029c = 0;
  *(uint8_t*)0x2000029d = 0;
  *(uint8_t*)0x2000029e = 0;
  *(uint8_t*)0x2000029f = 0;
  *(uint8_t*)0x200002a0 = 0;
  *(uint8_t*)0x200002a1 = 0;
  *(uint8_t*)0x200002a2 = 0;
  *(uint8_t*)0x200002a3 = 0;
  *(uint8_t*)0x200002a4 = 0;
  *(uint8_t*)0x200002a5 = 0;
  *(uint8_t*)0x200002a6 = 0;
  *(uint8_t*)0x200002a7 = 0;
  *(uint8_t*)0x200002a8 = 0;
  *(uint8_t*)0x200002a9 = 0;
  *(uint8_t*)0x200002aa = 0;
  *(uint8_t*)0x200002ab = 0;
  *(uint8_t*)0x200002ac = 0;
  *(uint8_t*)0x200002ad = 0;
  *(uint8_t*)0x200002ae = 0;
  *(uint8_t*)0x200002af = 0;
  *(uint8_t*)0x200002b0 = 0;
  *(uint8_t*)0x200002b1 = 0;
  *(uint8_t*)0x200002b2 = 0;
  *(uint8_t*)0x200002b3 = 0;
  *(uint8_t*)0x200002b4 = 0;
  *(uint8_t*)0x200002b5 = 0;
  *(uint8_t*)0x200002b6 = 0;
  *(uint8_t*)0x200002b7 = 0;
  *(uint8_t*)0x200002b8 = 0;
  *(uint8_t*)0x200002b9 = 0;
  *(uint8_t*)0x200002ba = 0;
  *(uint8_t*)0x200002bb = 0;
  *(uint8_t*)0x200002bc = 0;
  *(uint8_t*)0x200002bd = 0;
  *(uint8_t*)0x200002be = 0;
  *(uint8_t*)0x200002bf = 0;
  *(uint8_t*)0x200002c0 = 0;
  *(uint8_t*)0x200002c1 = 0;
  *(uint8_t*)0x200002c2 = 0;
  *(uint8_t*)0x200002c3 = 0;
  *(uint8_t*)0x200002c4 = 0;
  *(uint8_t*)0x200002c5 = 0;
  *(uint8_t*)0x200002c6 = 0;
  *(uint8_t*)0x200002c7 = 0;
  *(uint32_t*)0x200002c8 = 0;
  *(uint16_t*)0x200002cc = 0xe0;
  *(uint16_t*)0x200002ce = 0x108;
  *(uint32_t*)0x200002d0 = 0;
  *(uint64_t*)0x200002d8 = 0;
  *(uint64_t*)0x200002e0 = 0;
  *(uint16_t*)0x200002e8 = 0x38;
  memcpy((void*)0x200002ea, "\x63\x6f\x6e\x6e\x62\x79\x74\x65\x73\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20000307 = 0;
  *(uint64_t*)0x20000308 = 0;
  *(uint64_t*)0x20000310 = 0;
  *(uint8_t*)0x20000318 = 0;
  *(uint8_t*)0x20000319 = 0;
  *(uint16_t*)0x20000320 = 0x28;
  memcpy((void*)0x20000322, "\x4e\x46\x51\x55\x45\x55\x45\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x2000033f = 3;
  *(uint16_t*)0x20000340 = 0;
  *(uint16_t*)0x20000342 = 4;
  *(uint16_t*)0x20000344 = 0;
  *(uint8_t*)0x20000348 = 0;
  *(uint8_t*)0x20000349 = 0;
  *(uint8_t*)0x2000034a = 0;
  *(uint8_t*)0x2000034b = 0;
  *(uint8_t*)0x2000034c = 0;
  *(uint8_t*)0x2000034d = 0;
  *(uint8_t*)0x2000034e = 0;
  *(uint8_t*)0x2000034f = 0;
  *(uint8_t*)0x20000350 = 0;
  *(uint8_t*)0x20000351 = 0;
  *(uint8_t*)0x20000352 = 0;
  *(uint8_t*)0x20000353 = 0;
  *(uint8_t*)0x20000354 = 0;
  *(uint8_t*)0x20000355 = 0;
  *(uint8_t*)0x20000356 = 0;
  *(uint8_t*)0x20000357 = 0;
  *(uint8_t*)0x20000358 = 0;
  *(uint8_t*)0x20000359 = 0;
  *(uint8_t*)0x2000035a = 0;
  *(uint8_t*)0x2000035b = 0;
  *(uint8_t*)0x2000035c = 0;
  *(uint8_t*)0x2000035d = 0;
  *(uint8_t*)0x2000035e = 0;
  *(uint8_t*)0x2000035f = 0;
  *(uint8_t*)0x20000360 = 0;
  *(uint8_t*)0x20000361 = 0;
  *(uint8_t*)0x20000362 = 0;
  *(uint8_t*)0x20000363 = 0;
  *(uint8_t*)0x20000364 = 0;
  *(uint8_t*)0x20000365 = 0;
  *(uint8_t*)0x20000366 = 0;
  *(uint8_t*)0x20000367 = 0;
  *(uint8_t*)0x20000368 = 0;
  *(uint8_t*)0x20000369 = 0;
  *(uint8_t*)0x2000036a = 0;
  *(uint8_t*)0x2000036b = 0;
  *(uint8_t*)0x2000036c = 0;
  *(uint8_t*)0x2000036d = 0;
  *(uint8_t*)0x2000036e = 0;
  *(uint8_t*)0x2000036f = 0;
  *(uint8_t*)0x20000370 = 0;
  *(uint8_t*)0x20000371 = 0;
  *(uint8_t*)0x20000372 = 0;
  *(uint8_t*)0x20000373 = 0;
  *(uint8_t*)0x20000374 = 0;
  *(uint8_t*)0x20000375 = 0;
  *(uint8_t*)0x20000376 = 0;
  *(uint8_t*)0x20000377 = 0;
  *(uint8_t*)0x20000378 = 0;
  *(uint8_t*)0x20000379 = 0;
  *(uint8_t*)0x2000037a = 0;
  *(uint8_t*)0x2000037b = 0;
  *(uint8_t*)0x2000037c = 0;
  *(uint8_t*)0x2000037d = 0;
  *(uint8_t*)0x2000037e = 0;
  *(uint8_t*)0x2000037f = 0;
  *(uint8_t*)0x20000380 = 0;
  *(uint8_t*)0x20000381 = 0;
  *(uint8_t*)0x20000382 = 0;
  *(uint8_t*)0x20000383 = 0;
  *(uint8_t*)0x20000384 = 0;
  *(uint8_t*)0x20000385 = 0;
  *(uint8_t*)0x20000386 = 0;
  *(uint8_t*)0x20000387 = 0;
  *(uint8_t*)0x20000388 = 0;
  *(uint8_t*)0x20000389 = 0;
  *(uint8_t*)0x2000038a = 0;
  *(uint8_t*)0x2000038b = 0;
  *(uint8_t*)0x2000038c = 0;
  *(uint8_t*)0x2000038d = 0;
  *(uint8_t*)0x2000038e = 0;
  *(uint8_t*)0x2000038f = 0;
  *(uint8_t*)0x20000390 = 0;
  *(uint8_t*)0x20000391 = 0;
  *(uint8_t*)0x20000392 = 0;
  *(uint8_t*)0x20000393 = 0;
  *(uint8_t*)0x20000394 = 0;
  *(uint8_t*)0x20000395 = 0;
  *(uint8_t*)0x20000396 = 0;
  *(uint8_t*)0x20000397 = 0;
  *(uint8_t*)0x20000398 = 0;
  *(uint8_t*)0x20000399 = 0;
  *(uint8_t*)0x2000039a = 0;
  *(uint8_t*)0x2000039b = 0;
  *(uint8_t*)0x2000039c = 0;
  *(uint8_t*)0x2000039d = 0;
  *(uint8_t*)0x2000039e = 0;
  *(uint8_t*)0x2000039f = 0;
  *(uint8_t*)0x200003a0 = 0;
  *(uint8_t*)0x200003a1 = 0;
  *(uint8_t*)0x200003a2 = 0;
  *(uint8_t*)0x200003a3 = 0;
  *(uint8_t*)0x200003a4 = 0;
  *(uint8_t*)0x200003a5 = 0;
  *(uint8_t*)0x200003a6 = 0;
  *(uint8_t*)0x200003a7 = 0;
  *(uint8_t*)0x200003a8 = 0;
  *(uint8_t*)0x200003a9 = 0;
  *(uint8_t*)0x200003aa = 0;
  *(uint8_t*)0x200003ab = 0;
  *(uint8_t*)0x200003ac = 0;
  *(uint8_t*)0x200003ad = 0;
  *(uint8_t*)0x200003ae = 0;
  *(uint8_t*)0x200003af = 0;
  *(uint8_t*)0x200003b0 = 0;
  *(uint8_t*)0x200003b1 = 0;
  *(uint8_t*)0x200003b2 = 0;
  *(uint8_t*)0x200003b3 = 0;
  *(uint8_t*)0x200003b4 = 0;
  *(uint8_t*)0x200003b5 = 0;
  *(uint8_t*)0x200003b6 = 0;
  *(uint8_t*)0x200003b7 = 0;
  *(uint8_t*)0x200003b8 = 0;
  *(uint8_t*)0x200003b9 = 0;
  *(uint8_t*)0x200003ba = 0;
  *(uint8_t*)0x200003bb = 0;
  *(uint8_t*)0x200003bc = 0;
  *(uint8_t*)0x200003bd = 0;
  *(uint8_t*)0x200003be = 0;
  *(uint8_t*)0x200003bf = 0;
  *(uint8_t*)0x200003c0 = 0;
  *(uint8_t*)0x200003c1 = 0;
  *(uint8_t*)0x200003c2 = 0;
  *(uint8_t*)0x200003c3 = 0;
  *(uint8_t*)0x200003c4 = 0;
  *(uint8_t*)0x200003c5 = 0;
  *(uint8_t*)0x200003c6 = 0;
  *(uint8_t*)0x200003c7 = 0;
  *(uint8_t*)0x200003c8 = 0;
  *(uint8_t*)0x200003c9 = 0;
  *(uint8_t*)0x200003ca = 0;
  *(uint8_t*)0x200003cb = 0;
  *(uint8_t*)0x200003cc = 0;
  *(uint8_t*)0x200003cd = 0;
  *(uint8_t*)0x200003ce = 0;
  *(uint8_t*)0x200003cf = 0;
  *(uint32_t*)0x200003d0 = 0;
  *(uint16_t*)0x200003d4 = 0xa8;
  *(uint16_t*)0x200003d6 = 0xd0;
  *(uint32_t*)0x200003d8 = 0;
  *(uint64_t*)0x200003e0 = 0;
  *(uint64_t*)0x200003e8 = 0;
  *(uint16_t*)0x200003f0 = 0x28;
  memcpy((void*)0x200003f2, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x2000040f = 0;
  *(uint32_t*)0x20000410 = 0xfffffffe;
  syscall(__NR_setsockopt, r[0], 0x29, 0x40, 0x20000040, 0x3d8);
  *(uint8_t*)0x2037c000 = -1;
  *(uint8_t*)0x2037c001 = -1;
  *(uint8_t*)0x2037c002 = -1;
  *(uint8_t*)0x2037c003 = -1;
  *(uint8_t*)0x2037c004 = -1;
  *(uint8_t*)0x2037c005 = -1;
  *(uint8_t*)0x2037c006 = 0;
  *(uint8_t*)0x2037c007 = 0;
  *(uint8_t*)0x2037c008 = 0x14;
  *(uint8_t*)0x2037c009 = 0;
  *(uint8_t*)0x2037c00a = 0;
  *(uint8_t*)0x2037c00b = 0;
  *(uint16_t*)0x2037c00c = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x2037c00e, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2037c00e, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x2037c00f, 0xb, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x2037c00f, 0, 2, 6);
  *(uint16_t*)0x2037c010 = htobe16(0x1c);
  *(uint16_t*)0x2037c012 = 0;
  *(uint16_t*)0x2037c014 = htobe16(0);
  *(uint8_t*)0x2037c016 = 0;
  *(uint8_t*)0x2037c017 = 0;
  *(uint16_t*)0x2037c018 = 0;
  *(uint8_t*)0x2037c01a = 0xac;
  *(uint8_t*)0x2037c01b = 0x14;
  *(uint8_t*)0x2037c01c = 0;
  *(uint8_t*)0x2037c01d = 0xbb;
  *(uint32_t*)0x2037c01e = htobe32(0xe0000001);
  *(uint16_t*)0x2037c022 = 0;
  *(uint16_t*)0x2037c024 = 0;
  *(uint16_t*)0x2037c026 = htobe16(8);
  *(uint16_t*)0x2037c028 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x2037c01a, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x2037c01e, 4);
  uint16_t csum_1_chunk_2 = 0x1100;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2);
  uint16_t csum_1_chunk_3 = 0x800;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2);
  csum_inet_update(&csum_1, (const uint8_t*)0x2037c022, 8);
  *(uint16_t*)0x2037c028 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x2037c00e, 20);
  *(uint16_t*)0x2037c018 = csum_inet_digest(&csum_2);
  syz_emit_ethernet(0x2a, 0x2037c000, 0);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (;;) {
    setup_tun(0, true);
    loop();
  }
}