// https://syzkaller.appspot.com/bug?id=be77af8f4170f3350bed40f1b060851541287f2f
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <stdint.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

#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;
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void loop()
{
  long res;
  res = syscall(__NR_socket, 0xa, 2, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x18, 1, 1);
  if (res != -1)
    r[1] = res;
  *(uint16_t*)0x205fafd2 = 0x18;
  *(uint32_t*)0x205fafd4 = 1;
  *(uint32_t*)0x205fafd8 = 0;
  *(uint32_t*)0x205fafdc = r[0];
  *(uint16_t*)0x205fafe0 = 2;
  *(uint16_t*)0x205fafe2 = htobe16(0x4e21);
  *(uint8_t*)0x205fafe4 = 0xac;
  *(uint8_t*)0x205fafe5 = 0x14;
  *(uint8_t*)0x205fafe6 = 0;
  *(uint8_t*)0x205fafe7 = 0xbb;
  *(uint8_t*)0x205fafe8 = 0;
  *(uint8_t*)0x205fafe9 = 0;
  *(uint8_t*)0x205fafea = 0;
  *(uint8_t*)0x205fafeb = 0;
  *(uint8_t*)0x205fafec = 0;
  *(uint8_t*)0x205fafed = 0;
  *(uint8_t*)0x205fafee = 0;
  *(uint8_t*)0x205fafef = 0;
  *(uint32_t*)0x205faff0 = 4;
  *(uint32_t*)0x205faff4 = 0;
  *(uint32_t*)0x205faff8 = 2;
  *(uint32_t*)0x205faffc = 0;
  syscall(__NR_connect, r[1], 0x205fafd2, 0x2e);
  *(uint16_t*)0x20000000 = 0xa;
  *(uint16_t*)0x20000002 = htobe16(0x4e20);
  *(uint32_t*)0x20000004 = 0x1000;
  *(uint8_t*)0x20000008 = 0;
  *(uint8_t*)0x20000009 = 0;
  *(uint8_t*)0x2000000a = 0;
  *(uint8_t*)0x2000000b = 0;
  *(uint8_t*)0x2000000c = 0;
  *(uint8_t*)0x2000000d = 0;
  *(uint8_t*)0x2000000e = 0;
  *(uint8_t*)0x2000000f = 0;
  *(uint8_t*)0x20000010 = 0;
  *(uint8_t*)0x20000011 = 0;
  *(uint8_t*)0x20000012 = -1;
  *(uint8_t*)0x20000013 = -1;
  *(uint32_t*)0x20000014 = htobe32(0x7f000001);
  *(uint32_t*)0x20000018 = 1;
  syscall(__NR_connect, r[0], 0x20000000, 0x1c);
  *(uint16_t*)0x2064eff0 = 4;
  *(uint16_t*)0x2064eff2 = htobe16(0);
  *(uint32_t*)0x2064eff4 = htobe32(0x800);
  memcpy((void*)0x2064eff8, "\x86\x46\x2e\xb9\x66\xdc", 6);
  *(uint8_t*)0x2064effe = 8;
  *(uint8_t*)0x2064efff = 0;
  syscall(__NR_sendto, r[1], 0x20de7000, 0, 0xc3fe68eda9554f8b, 0x2064eff0,
          0x80);
  *(uint8_t*)0x2070aef1 = 1;
  *(uint8_t*)0x2070aef2 = 0x80;
  *(uint8_t*)0x2070aef3 = 0xc2;
  *(uint8_t*)0x2070aef4 = 0;
  *(uint8_t*)0x2070aef5 = 0;
  *(uint8_t*)0x2070aef6 = 0;
  *(uint8_t*)0x2070aef7 = 1;
  *(uint8_t*)0x2070aef8 = 0x80;
  *(uint8_t*)0x2070aef9 = 0xc2;
  *(uint8_t*)0x2070aefa = 0;
  *(uint8_t*)0x2070aefb = 0;
  *(uint8_t*)0x2070aefc = 0;
  *(uint16_t*)0x2070aefd = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x2070aeff, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2070aeff, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x2070af00, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x2070af00, 0, 2, 6);
  *(uint16_t*)0x2070af01 = htobe16(0x1c);
  *(uint16_t*)0x2070af03 = htobe16(0);
  *(uint16_t*)0x2070af05 = htobe16(0);
  *(uint8_t*)0x2070af07 = 0;
  *(uint8_t*)0x2070af08 = 0x11;
  *(uint16_t*)0x2070af09 = 0;
  *(uint8_t*)0x2070af0b = 0xac;
  *(uint8_t*)0x2070af0c = 0x14;
  *(uint8_t*)0x2070af0d = -1;
  *(uint8_t*)0x2070af0e = 0xbb;
  *(uint32_t*)0x2070af0f = htobe32(-1);
  *(uint16_t*)0x2070af13 = htobe16(0);
  *(uint16_t*)0x2070af15 = htobe16(0x4e21);
  *(uint16_t*)0x2070af17 = htobe16(8);
  *(uint16_t*)0x2070af19 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x2070af0b, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x2070af0f, 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*)0x2070af13, 8);
  *(uint16_t*)0x2070af19 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x2070aeff, 20);
  *(uint16_t*)0x2070af09 = csum_inet_digest(&csum_2);
}

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