// 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*)0x200000c0 = 0xa;
  *(uint16_t*)0x200000c2 = htobe16(0x4e21);
  *(uint32_t*)0x200000c4 = 0x7fff;
  *(uint8_t*)0x200000c8 = 0;
  *(uint8_t*)0x200000c9 = 0;
  *(uint8_t*)0x200000ca = 0;
  *(uint8_t*)0x200000cb = 0;
  *(uint8_t*)0x200000cc = 0;
  *(uint8_t*)0x200000cd = 0;
  *(uint8_t*)0x200000ce = 0;
  *(uint8_t*)0x200000cf = 0;
  *(uint8_t*)0x200000d0 = 0;
  *(uint8_t*)0x200000d1 = 0;
  *(uint8_t*)0x200000d2 = -1;
  *(uint8_t*)0x200000d3 = -1;
  *(uint32_t*)0x200000d4 = htobe32(0);
  *(uint32_t*)0x200000d8 = 3;
  syscall(__NR_connect, r[0], 0x200000c0, 0x1c);
  syscall(__NR_sendto, r[1], 0x20de7000, 0, 0xc3fe68eda9554f8b, 0x20000000, 0);
  *(uint8_t*)0x20000100 = 0xaa;
  *(uint8_t*)0x20000101 = 0xaa;
  *(uint8_t*)0x20000102 = 0xaa;
  *(uint8_t*)0x20000103 = 0xaa;
  *(uint8_t*)0x20000104 = 0xaa;
  *(uint8_t*)0x20000105 = 0xaa;
  *(uint8_t*)0x20000106 = -1;
  *(uint8_t*)0x20000107 = -1;
  *(uint8_t*)0x20000108 = -1;
  *(uint8_t*)0x20000109 = -1;
  *(uint8_t*)0x2000010a = -1;
  *(uint8_t*)0x2000010b = -1;
  *(uint16_t*)0x2000010c = htobe16(0x86dd);
  STORE_BY_BITMASK(uint8_t, 0x2000010e, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2000010e, 6, 4, 4);
  memcpy((void*)0x2000010f, "\xd8\x65\x2b", 3);
  *(uint16_t*)0x20000112 = htobe16(0x14);
  *(uint8_t*)0x20000114 = 6;
  *(uint8_t*)0x20000115 = 0;
  *(uint8_t*)0x20000116 = 0xfe;
  *(uint8_t*)0x20000117 = 0x7e;
  *(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;
  *(uint8_t*)0x20000120 = 0;
  *(uint8_t*)0x20000121 = 0;
  *(uint8_t*)0x20000122 = 0;
  *(uint8_t*)0x20000123 = 0;
  *(uint8_t*)0x20000124 = 0;
  *(uint8_t*)0x20000125 = 0xaa;
  *(uint8_t*)0x20000126 = 0xfe;
  *(uint8_t*)0x20000127 = 0x80;
  *(uint8_t*)0x20000128 = 0;
  *(uint8_t*)0x20000129 = 0;
  *(uint8_t*)0x2000012a = 0;
  *(uint8_t*)0x2000012b = 0;
  *(uint8_t*)0x2000012c = 0;
  *(uint8_t*)0x2000012d = 0;
  *(uint8_t*)0x2000012e = 0;
  *(uint8_t*)0x2000012f = 0;
  *(uint8_t*)0x20000130 = 0;
  *(uint8_t*)0x20000131 = 0;
  *(uint8_t*)0x20000132 = 0;
  *(uint8_t*)0x20000133 = 0;
  *(uint8_t*)0x20000134 = 0;
  *(uint8_t*)0x20000135 = 0xaa;
  *(uint16_t*)0x20000136 = htobe16(0x4e20);
  *(uint16_t*)0x20000138 = htobe16(0x4e20);
  *(uint32_t*)0x2000013a = 0x41424344;
  *(uint32_t*)0x2000013e = 0x41424344;
  STORE_BY_BITMASK(uint8_t, 0x20000142, 0, 0, 1);
  STORE_BY_BITMASK(uint8_t, 0x20000142, 0, 1, 3);
  STORE_BY_BITMASK(uint8_t, 0x20000142, 5, 4, 4);
  *(uint8_t*)0x20000143 = 0;
  *(uint16_t*)0x20000144 = htobe16(0);
  *(uint16_t*)0x20000146 = 0;
  *(uint16_t*)0x20000148 = htobe16(0);
  *(uint32_t*)0x200002c0 = 0;
  *(uint32_t*)0x200002c4 = 0;
  *(uint32_t*)0x200002c8 = 0;
  *(uint32_t*)0x200002cc = 0;
  *(uint32_t*)0x200002d0 = 0;
  *(uint32_t*)0x200002d4 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000116, 16);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000126, 16);
  uint32_t csum_1_chunk_2 = 0x14000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 4);
  uint32_t csum_1_chunk_3 = 0x6000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000136, 20);
  *(uint16_t*)0x20000146 = csum_inet_digest(&csum_1);
}

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