// https://syzkaller.appspot.com/bug?id=d38ed0177151ca71af235c613ab4897461cf9ff3
// 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[1] = {0xffffffffffffffff};
void loop()
{
  long res;
  *(uint8_t*)0x20000040 = -1;
  *(uint8_t*)0x20000041 = -1;
  *(uint8_t*)0x20000042 = -1;
  *(uint8_t*)0x20000043 = -1;
  *(uint8_t*)0x20000044 = -1;
  *(uint8_t*)0x20000045 = -1;
  *(uint8_t*)0x20000046 = 0xaa;
  *(uint8_t*)0x20000047 = 0xaa;
  *(uint8_t*)0x20000048 = 0xaa;
  *(uint8_t*)0x20000049 = 0xaa;
  *(uint8_t*)0x2000004a = 0xaa;
  *(uint8_t*)0x2000004b = 0xbb;
  *(uint16_t*)0x2000004c = htobe16(0x9100);
  STORE_BY_BITMASK(uint16_t, 0x2000004e, 6, 0, 3);
  STORE_BY_BITMASK(uint16_t, 0x2000004e, 7, 3, 1);
  STORE_BY_BITMASK(uint16_t, 0x2000004e, 3, 4, 12);
  *(uint16_t*)0x20000050 = htobe16(0x8100);
  STORE_BY_BITMASK(uint16_t, 0x20000052, 0, 0, 3);
  STORE_BY_BITMASK(uint16_t, 0x20000052, 0x5d5, 3, 1);
  STORE_BY_BITMASK(uint16_t, 0x20000052, 1, 4, 12);
  *(uint16_t*)0x20000054 = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x20000056, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20000056, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x20000057, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x20000057, 0, 2, 6);
  *(uint16_t*)0x20000058 = htobe16(0x1c);
  *(uint16_t*)0x2000005a = htobe16(0);
  *(uint16_t*)0x2000005c = htobe16(0);
  *(uint8_t*)0x2000005e = 0;
  *(uint8_t*)0x2000005f = 0;
  *(uint16_t*)0x20000060 = 0;
  *(uint32_t*)0x20000062 = htobe32(0x7f000001);
  *(uint8_t*)0x20000066 = 0xac;
  *(uint8_t*)0x20000067 = 0x14;
  *(uint8_t*)0x20000068 = 0x14;
  *(uint8_t*)0x20000069 = 0xbb;
  *(uint16_t*)0x2000006a = htobe16(0);
  *(uint16_t*)0x2000006c = htobe16(0);
  *(uint16_t*)0x2000006e = htobe16(8);
  *(uint16_t*)0x20000070 = 0;
  *(uint32_t*)0x20000000 = 0;
  *(uint32_t*)0x20000004 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint32_t*)0x2000000c = 0;
  *(uint32_t*)0x20000010 = 0;
  *(uint32_t*)0x20000014 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000062, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000066, 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*)0x2000006a, 8);
  *(uint16_t*)0x20000070 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x20000056, 20);
  *(uint16_t*)0x20000060 = csum_inet_digest(&csum_2);
  res = syscall(__NR_socket, 2, 1, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20d06000 = 1;
  syscall(__NR_setsockopt, r[0], 6, 0x10000000013, 0x20d06000, 4);
  *(uint32_t*)0x20788ffc = 1;
  syscall(__NR_setsockopt, r[0], 6, 0x14, 0x20788ffc, 0xfdf6);
  memcpy((void*)0x20a6efff, "\xcf", 1);
  *(uint16_t*)0x20385ff0 = 2;
  *(uint16_t*)0x20385ff2 = htobe16(0);
  *(uint32_t*)0x20385ff4 = htobe32(0x7f000001);
  *(uint8_t*)0x20385ff8 = 0;
  *(uint8_t*)0x20385ff9 = 0;
  *(uint8_t*)0x20385ffa = 0;
  *(uint8_t*)0x20385ffb = 0;
  *(uint8_t*)0x20385ffc = 0;
  *(uint8_t*)0x20385ffd = 0;
  *(uint8_t*)0x20385ffe = 0;
  *(uint8_t*)0x20385fff = 0;
  syscall(__NR_sendto, r[0], 0x20a6efff, 1, 0x20020003, 0x20385ff0, 0x10);
  memcpy((void*)0x20000140, "\x02", 1);
  *(uint16_t*)0x20000100 = 2;
  *(uint16_t*)0x20000102 = htobe16(0);
  *(uint8_t*)0x20000104 = 0xac;
  *(uint8_t*)0x20000105 = 0x14;
  *(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;
  syscall(__NR_sendto, r[0], 0x20000140, 1, 0, 0x20000100, 0x10);
}

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