// https://syzkaller.appspot.com/bug?id=a63c0e4c1b0b82c8a768cd3ca9f7c459faa11787
// 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);
}

long r[1];
void loop()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0x2c000, 3, 0x32, -1, 0);
  r[0] = syscall(__NR_socket, 2, 0x80005, 0);
  memcpy((void*)0x20016ca8, "\x66\x69\x6c\x74\x65\x72\x00\x00\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);
  *(uint32_t*)0x20016cc8 = 0xe;
  *(uint32_t*)0x20016ccc = 4;
  *(uint32_t*)0x20016cd0 = 0x2f8;
  *(uint32_t*)0x20016cd4 = -1;
  *(uint32_t*)0x20016cd8 = 0;
  *(uint32_t*)0x20016cdc = 0;
  *(uint32_t*)0x20016ce0 = 0;
  *(uint32_t*)0x20016ce4 = -1;
  *(uint32_t*)0x20016ce8 = -1;
  *(uint32_t*)0x20016cec = 0;
  *(uint32_t*)0x20016cf0 = 0;
  *(uint32_t*)0x20016cf4 = 0;
  *(uint32_t*)0x20016cf8 = -1;
  *(uint32_t*)0x20016cfc = 4;
  *(uint64_t*)0x20016d00 = 0x20001000;
  *(uint8_t*)0x20016d08 = 0;
  *(uint8_t*)0x20016d09 = 0;
  *(uint8_t*)0x20016d0a = 0;
  *(uint8_t*)0x20016d0b = 0;
  *(uint8_t*)0x20016d0c = 0;
  *(uint8_t*)0x20016d0d = 0;
  *(uint8_t*)0x20016d0e = 0;
  *(uint8_t*)0x20016d0f = 0;
  *(uint8_t*)0x20016d10 = 0;
  *(uint8_t*)0x20016d11 = 0;
  *(uint8_t*)0x20016d12 = 0;
  *(uint8_t*)0x20016d13 = 0;
  *(uint8_t*)0x20016d14 = 0;
  *(uint8_t*)0x20016d15 = 0;
  *(uint8_t*)0x20016d16 = 0;
  *(uint8_t*)0x20016d17 = 0;
  *(uint8_t*)0x20016d18 = 0;
  *(uint8_t*)0x20016d19 = 0;
  *(uint8_t*)0x20016d1a = 0;
  *(uint8_t*)0x20016d1b = 0;
  *(uint8_t*)0x20016d1c = 0;
  *(uint8_t*)0x20016d1d = 0;
  *(uint8_t*)0x20016d1e = 0;
  *(uint8_t*)0x20016d1f = 0;
  *(uint8_t*)0x20016d20 = 0;
  *(uint8_t*)0x20016d21 = 0;
  *(uint8_t*)0x20016d22 = 0;
  *(uint8_t*)0x20016d23 = 0;
  *(uint8_t*)0x20016d24 = 0;
  *(uint8_t*)0x20016d25 = 0;
  *(uint8_t*)0x20016d26 = 0;
  *(uint8_t*)0x20016d27 = 0;
  *(uint8_t*)0x20016d28 = 0;
  *(uint8_t*)0x20016d29 = 0;
  *(uint8_t*)0x20016d2a = 0;
  *(uint8_t*)0x20016d2b = 0;
  *(uint8_t*)0x20016d2c = 0;
  *(uint8_t*)0x20016d2d = 0;
  *(uint8_t*)0x20016d2e = 0;
  *(uint8_t*)0x20016d2f = 0;
  *(uint8_t*)0x20016d30 = 0;
  *(uint8_t*)0x20016d31 = 0;
  *(uint8_t*)0x20016d32 = 0;
  *(uint8_t*)0x20016d33 = 0;
  *(uint8_t*)0x20016d34 = 0;
  *(uint8_t*)0x20016d35 = 0;
  *(uint8_t*)0x20016d36 = 0;
  *(uint8_t*)0x20016d37 = 0;
  *(uint8_t*)0x20016d38 = 0;
  *(uint8_t*)0x20016d39 = 0;
  *(uint8_t*)0x20016d3a = 0;
  *(uint8_t*)0x20016d3b = 0;
  *(uint8_t*)0x20016d3c = 0;
  *(uint8_t*)0x20016d3d = 0;
  *(uint8_t*)0x20016d3e = 0;
  *(uint8_t*)0x20016d3f = 0;
  *(uint8_t*)0x20016d40 = 0;
  *(uint8_t*)0x20016d41 = 0;
  *(uint8_t*)0x20016d42 = 0;
  *(uint8_t*)0x20016d43 = 0;
  *(uint8_t*)0x20016d44 = 0;
  *(uint8_t*)0x20016d45 = 0;
  *(uint8_t*)0x20016d46 = 0;
  *(uint8_t*)0x20016d47 = 0;
  *(uint8_t*)0x20016d48 = 0;
  *(uint8_t*)0x20016d49 = 0;
  *(uint8_t*)0x20016d4a = 0;
  *(uint8_t*)0x20016d4b = 0;
  *(uint8_t*)0x20016d4c = 0;
  *(uint8_t*)0x20016d4d = 0;
  *(uint8_t*)0x20016d4e = 0;
  *(uint8_t*)0x20016d4f = 0;
  *(uint8_t*)0x20016d50 = 0;
  *(uint8_t*)0x20016d51 = 0;
  *(uint8_t*)0x20016d52 = 0;
  *(uint8_t*)0x20016d53 = 0;
  *(uint8_t*)0x20016d54 = 0;
  *(uint8_t*)0x20016d55 = 0;
  *(uint8_t*)0x20016d56 = 0;
  *(uint8_t*)0x20016d57 = 0;
  *(uint8_t*)0x20016d58 = 0;
  *(uint8_t*)0x20016d59 = 0;
  *(uint8_t*)0x20016d5a = 0;
  *(uint8_t*)0x20016d5b = 0;
  *(uint32_t*)0x20016d5c = 0;
  *(uint16_t*)0x20016d60 = 0x70;
  *(uint16_t*)0x20016d62 = 0x98;
  *(uint32_t*)0x20016d64 = 0;
  *(uint64_t*)0x20016d68 = 0;
  *(uint64_t*)0x20016d70 = 0;
  *(uint16_t*)0x20016d78 = 0x28;
  memcpy((void*)0x20016d7a, "\x00\x00\x00\x00\x00\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*)0x20016d97 = 0;
  *(uint32_t*)0x20016d98 = 0xfffffffe;
  *(uint8_t*)0x20016da0 = 0;
  *(uint8_t*)0x20016da1 = 0;
  *(uint8_t*)0x20016da2 = 0;
  *(uint8_t*)0x20016da3 = 0;
  *(uint8_t*)0x20016da4 = 0;
  *(uint8_t*)0x20016da5 = 0;
  *(uint8_t*)0x20016da6 = 0;
  *(uint8_t*)0x20016da7 = 0;
  *(uint8_t*)0x20016da8 = 0;
  *(uint8_t*)0x20016da9 = 0;
  *(uint8_t*)0x20016daa = 0;
  *(uint8_t*)0x20016dab = 0;
  *(uint8_t*)0x20016dac = 0;
  *(uint8_t*)0x20016dad = 0;
  *(uint8_t*)0x20016dae = 0;
  *(uint8_t*)0x20016daf = 0;
  *(uint8_t*)0x20016db0 = 0;
  *(uint8_t*)0x20016db1 = 0;
  *(uint8_t*)0x20016db2 = 0;
  *(uint8_t*)0x20016db3 = 0;
  *(uint8_t*)0x20016db4 = 0;
  *(uint8_t*)0x20016db5 = 0;
  *(uint8_t*)0x20016db6 = 0;
  *(uint8_t*)0x20016db7 = 0;
  *(uint8_t*)0x20016db8 = 0;
  *(uint8_t*)0x20016db9 = 0;
  *(uint8_t*)0x20016dba = 0;
  *(uint8_t*)0x20016dbb = 0;
  *(uint8_t*)0x20016dbc = 0;
  *(uint8_t*)0x20016dbd = 0;
  *(uint8_t*)0x20016dbe = 0;
  *(uint8_t*)0x20016dbf = 0;
  *(uint8_t*)0x20016dc0 = 0;
  *(uint8_t*)0x20016dc1 = 0;
  *(uint8_t*)0x20016dc2 = 0;
  *(uint8_t*)0x20016dc3 = 0;
  *(uint8_t*)0x20016dc4 = 0;
  *(uint8_t*)0x20016dc5 = 0;
  *(uint8_t*)0x20016dc6 = 0;
  *(uint8_t*)0x20016dc7 = 0;
  *(uint8_t*)0x20016dc8 = 0;
  *(uint8_t*)0x20016dc9 = 0;
  *(uint8_t*)0x20016dca = 0;
  *(uint8_t*)0x20016dcb = 0;
  *(uint8_t*)0x20016dcc = 0;
  *(uint8_t*)0x20016dcd = 0;
  *(uint8_t*)0x20016dce = 0;
  *(uint8_t*)0x20016dcf = 0;
  *(uint8_t*)0x20016dd0 = 0;
  *(uint8_t*)0x20016dd1 = 0;
  *(uint8_t*)0x20016dd2 = 0;
  *(uint8_t*)0x20016dd3 = 0;
  *(uint8_t*)0x20016dd4 = 0;
  *(uint8_t*)0x20016dd5 = 0;
  *(uint8_t*)0x20016dd6 = 0;
  *(uint8_t*)0x20016dd7 = 0;
  *(uint8_t*)0x20016dd8 = 0;
  *(uint8_t*)0x20016dd9 = 0;
  *(uint8_t*)0x20016dda = 0;
  *(uint8_t*)0x20016ddb = 0;
  *(uint8_t*)0x20016ddc = 0;
  *(uint8_t*)0x20016ddd = 0;
  *(uint8_t*)0x20016dde = 0;
  *(uint8_t*)0x20016ddf = 0;
  *(uint8_t*)0x20016de0 = 0;
  *(uint8_t*)0x20016de1 = 0;
  *(uint8_t*)0x20016de2 = 0;
  *(uint8_t*)0x20016de3 = 0;
  *(uint8_t*)0x20016de4 = 0;
  *(uint8_t*)0x20016de5 = 0;
  *(uint8_t*)0x20016de6 = 0;
  *(uint8_t*)0x20016de7 = 0;
  *(uint8_t*)0x20016de8 = 0;
  *(uint8_t*)0x20016de9 = 0;
  *(uint8_t*)0x20016dea = 0;
  *(uint8_t*)0x20016deb = 0;
  *(uint8_t*)0x20016dec = 0;
  *(uint8_t*)0x20016ded = 0;
  *(uint8_t*)0x20016dee = 0;
  *(uint8_t*)0x20016def = 0;
  *(uint8_t*)0x20016df0 = 0;
  *(uint8_t*)0x20016df1 = 0;
  *(uint8_t*)0x20016df2 = 0;
  *(uint8_t*)0x20016df3 = 0;
  *(uint32_t*)0x20016df4 = 0;
  *(uint16_t*)0x20016df8 = 0x70;
  *(uint16_t*)0x20016dfa = 0x98;
  *(uint32_t*)0x20016dfc = 0;
  *(uint64_t*)0x20016e00 = 0;
  *(uint64_t*)0x20016e08 = 0;
  *(uint16_t*)0x20016e10 = 0x28;
  memcpy((void*)0x20016e12, "\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*)0x20016e2f = 0;
  *(uint32_t*)0x20016e30 = 0;
  *(uint32_t*)0x20016e38 = htobe32(0x7f000001);
  *(uint32_t*)0x20016e3c = htobe32(0x7f000001);
  *(uint32_t*)0x20016e40 = htobe32(0xff000000);
  *(uint32_t*)0x20016e44 = htobe32(-1);
  *(uint8_t*)0x20016e48 = 0x73;
  *(uint8_t*)0x20016e49 = 0x79;
  *(uint8_t*)0x20016e4a = 0x7a;
  *(uint8_t*)0x20016e4b = 0x30;
  *(uint8_t*)0x20016e4c = 0;
  memcpy((void*)0x20016e58,
         "\x91\xe2\xb2\x14\xd5\x17\x5c\x63\x8d\xe7\x93\x7d\x2a\x21\xe3\xd6",
         16);
  *(uint8_t*)0x20016e68 = -1;
  *(uint8_t*)0x20016e69 = 0;
  *(uint8_t*)0x20016e6a = 0;
  *(uint8_t*)0x20016e6b = 0;
  *(uint8_t*)0x20016e6c = 0;
  *(uint8_t*)0x20016e6d = 0;
  *(uint8_t*)0x20016e6e = 0;
  *(uint8_t*)0x20016e6f = 0;
  *(uint8_t*)0x20016e70 = 0;
  *(uint8_t*)0x20016e71 = 0;
  *(uint8_t*)0x20016e72 = 0;
  *(uint8_t*)0x20016e73 = 0;
  *(uint8_t*)0x20016e74 = 0;
  *(uint8_t*)0x20016e75 = 0;
  *(uint8_t*)0x20016e76 = 0;
  *(uint8_t*)0x20016e77 = 0;
  *(uint8_t*)0x20016e78 = 0;
  *(uint8_t*)0x20016e79 = 0;
  *(uint8_t*)0x20016e7a = 0;
  *(uint8_t*)0x20016e7b = 0;
  *(uint8_t*)0x20016e7c = 0;
  *(uint8_t*)0x20016e7d = 0;
  *(uint8_t*)0x20016e7e = 0;
  *(uint8_t*)0x20016e7f = 0;
  *(uint8_t*)0x20016e80 = 0;
  *(uint8_t*)0x20016e81 = 0;
  *(uint8_t*)0x20016e82 = 0;
  *(uint8_t*)0x20016e83 = 0;
  *(uint8_t*)0x20016e84 = 0;
  *(uint8_t*)0x20016e85 = 0;
  *(uint8_t*)0x20016e86 = 0;
  *(uint8_t*)0x20016e87 = 0;
  *(uint16_t*)0x20016e88 = 0x9f;
  *(uint8_t*)0x20016e8a = 2;
  *(uint8_t*)0x20016e8b = 0;
  *(uint32_t*)0x20016e8c = 0;
  *(uint16_t*)0x20016e90 = 0x98;
  *(uint16_t*)0x20016e92 = 0xf8;
  *(uint32_t*)0x20016e94 = 0;
  *(uint64_t*)0x20016e98 = 0;
  *(uint64_t*)0x20016ea0 = 0;
  *(uint16_t*)0x20016ea8 = 0x28;
  memcpy((void*)0x20016eaa, "\x63\x6f\x6e\x6e\x6c\x61\x62\x65\x6c\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20016ec7 = 0;
  *(uint16_t*)0x20016ec8 = 0;
  *(uint16_t*)0x20016eca = 0;
  *(uint16_t*)0x20016ed0 = 0x60;
  memcpy((void*)0x20016ed2, "\x43\x4c\x55\x53\x54\x45\x52\x49\x50\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20016eef = 0;
  *(uint32_t*)0x20016ef0 = 1;
  *(uint8_t*)0x20016ef4 = 0xaa;
  *(uint8_t*)0x20016ef5 = 0xaa;
  *(uint8_t*)0x20016ef6 = 0xaa;
  *(uint8_t*)0x20016ef7 = 0xaa;
  *(uint8_t*)0x20016ef8 = 0;
  *(uint8_t*)0x20016ef9 = 0xaa;
  *(uint16_t*)0x20016efa = 0xfffe;
  *(uint16_t*)0x20016efc = -1;
  *(uint16_t*)0x20016efe = 1;
  *(uint16_t*)0x20016f00 = 0xda;
  *(uint16_t*)0x20016f02 = 1;
  *(uint16_t*)0x20016f04 = 8;
  *(uint16_t*)0x20016f06 = 6;
  *(uint16_t*)0x20016f08 = 0x32d;
  *(uint16_t*)0x20016f0a = 0x76;
  *(uint16_t*)0x20016f0c = -1;
  *(uint16_t*)0x20016f0e = 0x8868;
  *(uint16_t*)0x20016f10 = 3;
  *(uint16_t*)0x20016f12 = 6;
  *(uint16_t*)0x20016f14 = 3;
  *(uint16_t*)0x20016f16 = 7;
  *(uint16_t*)0x20016f18 = 9;
  *(uint16_t*)0x20016f1a = -1;
  *(uint16_t*)0x20016f1c = 0x800;
  *(uint32_t*)0x20016f20 = 0;
  *(uint32_t*)0x20016f24 = 0x16;
  *(uint64_t*)0x20016f28 = 0;
  *(uint8_t*)0x20016f30 = 0;
  *(uint8_t*)0x20016f31 = 0;
  *(uint8_t*)0x20016f32 = 0;
  *(uint8_t*)0x20016f33 = 0;
  *(uint8_t*)0x20016f34 = 0;
  *(uint8_t*)0x20016f35 = 0;
  *(uint8_t*)0x20016f36 = 0;
  *(uint8_t*)0x20016f37 = 0;
  *(uint8_t*)0x20016f38 = 0;
  *(uint8_t*)0x20016f39 = 0;
  *(uint8_t*)0x20016f3a = 0;
  *(uint8_t*)0x20016f3b = 0;
  *(uint8_t*)0x20016f3c = 0;
  *(uint8_t*)0x20016f3d = 0;
  *(uint8_t*)0x20016f3e = 0;
  *(uint8_t*)0x20016f3f = 0;
  *(uint8_t*)0x20016f40 = 0;
  *(uint8_t*)0x20016f41 = 0;
  *(uint8_t*)0x20016f42 = 0;
  *(uint8_t*)0x20016f43 = 0;
  *(uint8_t*)0x20016f44 = 0;
  *(uint8_t*)0x20016f45 = 0;
  *(uint8_t*)0x20016f46 = 0;
  *(uint8_t*)0x20016f47 = 0;
  *(uint8_t*)0x20016f48 = 0;
  *(uint8_t*)0x20016f49 = 0;
  *(uint8_t*)0x20016f4a = 0;
  *(uint8_t*)0x20016f4b = 0;
  *(uint8_t*)0x20016f4c = 0;
  *(uint8_t*)0x20016f4d = 0;
  *(uint8_t*)0x20016f4e = 0;
  *(uint8_t*)0x20016f4f = 0;
  *(uint8_t*)0x20016f50 = 0;
  *(uint8_t*)0x20016f51 = 0;
  *(uint8_t*)0x20016f52 = 0;
  *(uint8_t*)0x20016f53 = 0;
  *(uint8_t*)0x20016f54 = 0;
  *(uint8_t*)0x20016f55 = 0;
  *(uint8_t*)0x20016f56 = 0;
  *(uint8_t*)0x20016f57 = 0;
  *(uint8_t*)0x20016f58 = 0;
  *(uint8_t*)0x20016f59 = 0;
  *(uint8_t*)0x20016f5a = 0;
  *(uint8_t*)0x20016f5b = 0;
  *(uint8_t*)0x20016f5c = 0;
  *(uint8_t*)0x20016f5d = 0;
  *(uint8_t*)0x20016f5e = 0;
  *(uint8_t*)0x20016f5f = 0;
  *(uint8_t*)0x20016f60 = 0;
  *(uint8_t*)0x20016f61 = 0;
  *(uint8_t*)0x20016f62 = 0;
  *(uint8_t*)0x20016f63 = 0;
  *(uint8_t*)0x20016f64 = 0;
  *(uint8_t*)0x20016f65 = 0;
  *(uint8_t*)0x20016f66 = 0;
  *(uint8_t*)0x20016f67 = 0;
  *(uint8_t*)0x20016f68 = 0;
  *(uint8_t*)0x20016f69 = 0;
  *(uint8_t*)0x20016f6a = 0;
  *(uint8_t*)0x20016f6b = 0;
  *(uint8_t*)0x20016f6c = 0;
  *(uint8_t*)0x20016f6d = 0;
  *(uint8_t*)0x20016f6e = 0;
  *(uint8_t*)0x20016f6f = 0;
  *(uint8_t*)0x20016f70 = 0;
  *(uint8_t*)0x20016f71 = 0;
  *(uint8_t*)0x20016f72 = 0;
  *(uint8_t*)0x20016f73 = 0;
  *(uint8_t*)0x20016f74 = 0;
  *(uint8_t*)0x20016f75 = 0;
  *(uint8_t*)0x20016f76 = 0;
  *(uint8_t*)0x20016f77 = 0;
  *(uint8_t*)0x20016f78 = 0;
  *(uint8_t*)0x20016f79 = 0;
  *(uint8_t*)0x20016f7a = 0;
  *(uint8_t*)0x20016f7b = 0;
  *(uint8_t*)0x20016f7c = 0;
  *(uint8_t*)0x20016f7d = 0;
  *(uint8_t*)0x20016f7e = 0;
  *(uint8_t*)0x20016f7f = 0;
  *(uint8_t*)0x20016f80 = 0;
  *(uint8_t*)0x20016f81 = 0;
  *(uint8_t*)0x20016f82 = 0;
  *(uint8_t*)0x20016f83 = 0;
  *(uint32_t*)0x20016f84 = 0;
  *(uint16_t*)0x20016f88 = 0x70;
  *(uint16_t*)0x20016f8a = 0xd0;
  *(uint32_t*)0x20016f8c = 0;
  *(uint64_t*)0x20016f90 = 0;
  *(uint64_t*)0x20016f98 = 0;
  *(uint16_t*)0x20016fa0 = 0x60;
  memcpy((void*)0x20016fa2, "\x43\x4c\x55\x53\x54\x45\x52\x49\x50\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00",
         29);
  *(uint8_t*)0x20016fbf = 0;
  *(uint32_t*)0x20016fc0 = 1;
  memcpy((void*)0x20016fc4, "\x31\x14\x7f\xe7\x2f\x89", 6);
  *(uint16_t*)0x20016fca = 0x20;
  *(uint16_t*)0x20016fcc = 0x6d76;
  *(uint16_t*)0x20016fce = 1;
  *(uint16_t*)0x20016fd0 = 7;
  *(uint16_t*)0x20016fd2 = 6;
  *(uint16_t*)0x20016fd4 = 0xfffa;
  *(uint16_t*)0x20016fd6 = 7;
  *(uint16_t*)0x20016fd8 = 6;
  *(uint16_t*)0x20016fda = 1;
  *(uint16_t*)0x20016fdc = 0x81;
  *(uint16_t*)0x20016fde = 1;
  *(uint16_t*)0x20016fe0 = 7;
  *(uint16_t*)0x20016fe2 = 0x49;
  *(uint16_t*)0x20016fe4 = 5;
  *(uint16_t*)0x20016fe6 = 3;
  *(uint16_t*)0x20016fe8 = 0x1ff;
  *(uint16_t*)0x20016fea = 8;
  *(uint16_t*)0x20016fec = 0;
  *(uint32_t*)0x20016ff0 = 1;
  *(uint32_t*)0x20016ff4 = 2;
  *(uint64_t*)0x20016ff8 = 7;
  *(uint64_t*)0x20001000 = 0;
  *(uint64_t*)0x20001008 = 0;
  *(uint64_t*)0x20001010 = 0;
  *(uint64_t*)0x20001018 = 0;
  *(uint64_t*)0x20001020 = 0;
  *(uint64_t*)0x20001028 = 0;
  *(uint64_t*)0x20001030 = 0;
  *(uint64_t*)0x20001038 = 0;
  syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20016ca8, 0x358);
  *(uint8_t*)0x2001ffa2 = -1;
  *(uint8_t*)0x2001ffa3 = -1;
  *(uint8_t*)0x2001ffa4 = -1;
  *(uint8_t*)0x2001ffa5 = -1;
  *(uint8_t*)0x2001ffa6 = -1;
  *(uint8_t*)0x2001ffa7 = -1;
  *(uint8_t*)0x2001ffa8 = 0xaa;
  *(uint8_t*)0x2001ffa9 = 0xaa;
  *(uint8_t*)0x2001ffaa = 0xaa;
  *(uint8_t*)0x2001ffab = 0xaa;
  *(uint8_t*)0x2001ffac = 0;
  *(uint8_t*)0x2001ffad = 0;
  *(uint16_t*)0x2001ffae = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x2001ffb0, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2001ffb0, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x2001ffb1, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x2001ffb1, 0, 2, 6);
  *(uint16_t*)0x2001ffb2 = htobe16(0x2c);
  *(uint16_t*)0x2001ffb4 = 0;
  *(uint16_t*)0x2001ffb6 = htobe16(0);
  *(uint8_t*)0x2001ffb8 = 0;
  *(uint8_t*)0x2001ffb9 = 6;
  *(uint16_t*)0x2001ffba = 0;
  *(uint8_t*)0x2001ffbc = 0xac;
  *(uint8_t*)0x2001ffbd = 0x14;
  *(uint8_t*)0x2001ffbe = 0;
  *(uint8_t*)0x2001ffbf = 0xaa;
  *(uint32_t*)0x2001ffc0 = htobe32(0);
  *(uint16_t*)0x2001ffc4 = 0;
  *(uint16_t*)0x2001ffc6 = 0;
  *(uint32_t*)0x2001ffc8 = 0x42424242;
  *(uint32_t*)0x2001ffcc = 0x42424242;
  STORE_BY_BITMASK(uint8_t, 0x2001ffd0, 0, 0, 1);
  STORE_BY_BITMASK(uint8_t, 0x2001ffd0, 0, 1, 3);
  STORE_BY_BITMASK(uint8_t, 0x2001ffd0, 6, 4, 4);
  *(uint8_t*)0x2001ffd1 = 0x10;
  *(uint16_t*)0x2001ffd2 = htobe16(0);
  *(uint16_t*)0x2001ffd4 = 0;
  *(uint16_t*)0x2001ffd6 = htobe16(0);
  *(uint8_t*)0x2001ffd8 = 5;
  *(uint8_t*)0x2001ffd9 = 2;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x2001ffbc, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x2001ffc0, 4);
  uint16_t csum_1_chunk_2 = 0x600;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2);
  uint16_t csum_1_chunk_3 = 0x1800;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2);
  csum_inet_update(&csum_1, (const uint8_t*)0x2001ffc4, 24);
  *(uint16_t*)0x2001ffd4 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x2001ffb0, 20);
  *(uint16_t*)0x2001ffba = csum_inet_digest(&csum_2);
  syz_emit_ethernet(0x3a, 0x2001ffa2, 0x20000000);
}

int main()
{
  setup_tun(0, true);
  loop();
  return 0;
}