// 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 = 0;
  memcpy((void*)0x20982f5b, "\x03\x52\xba\x8e\x82\x27", 6);
  memcpy((void*)0x20982f61, "\x62\x15\x41\x07\x72\xf8", 6);
  *(uint16_t*)0x20982f67 = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x20982f69, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20982f69, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x20982f6a, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x20982f6a, 0, 2, 6);
  *(uint16_t*)0x20982f6b = htobe16(1);
  *(uint16_t*)0x20982f6d = htobe16(0);
  *(uint16_t*)0x20982f6f = htobe16(0);
  *(uint8_t*)0x20982f71 = 0;
  *(uint8_t*)0x20982f72 = 0;
  *(uint16_t*)0x20982f73 = 0;
  *(uint32_t*)0x20982f75 = htobe32(0);
  *(uint32_t*)0x20982f79 = htobe32(0xe0000001);
  *(uint16_t*)0x20982f7d = htobe16(0);
  *(uint16_t*)0x20982f7f = htobe16(0);
  *(uint8_t*)0x20982f81 = 4;
  STORE_BY_BITMASK(uint8_t, 0x20982f82, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20982f82, 0, 4, 4);
  *(uint16_t*)0x20982f83 = 0;
  STORE_BY_BITMASK(uint8_t, 0x20982f85, 0, 0, 1);
  STORE_BY_BITMASK(uint8_t, 0x20982f85, 0, 1, 4);
  STORE_BY_BITMASK(uint8_t, 0x20982f85, 0, 5, 3);
  memcpy((void*)0x20982f86, "\x20\x99\xe9", 3);
  *(uint8_t*)0x20982f89 = 0;
  memcpy((void*)0x20982f8a, "\x5d\x00\x10", 3);
  *(uint32_t*)0x200e7fec = 0;
  *(uint32_t*)0x200e7ff0 = 0;
  *(uint32_t*)0x200e7ff4 = 0;
  *(uint32_t*)0x200e7ff8 = 0;
  *(uint32_t*)0x200e7ffc = 0;
  *(uint32_t*)0x200e8000 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x20982f75, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x20982f79, 4);
  uint16_t csum_1_chunk_2 = 0x2100;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2);
  uint16_t csum_1_chunk_3 = 0x1000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2);
  csum_inet_update(&csum_1, (const uint8_t*)0x20982f7d, 16);
  *(uint16_t*)0x20982f83 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x20982f69, 20);
  *(uint16_t*)0x20982f73 = csum_inet_digest(&csum_2);
  res = syscall(__NR_socket, 2, 1, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000100 = 1;
  syscall(__NR_setsockopt, r[0], 6, 0x10000000013, 0x20000100, 0x22d);
  *(uint32_t*)0x20788ffc = 1;
  syscall(__NR_setsockopt, r[0], 6, 0x14, 0x20788ffc, 0xfdf6);
  memcpy((void*)0x20000dc0, "a", 1);
  *(uint16_t*)0x200001c0 = 2;
  *(uint16_t*)0x200001c2 = htobe16(0);
  *(uint32_t*)0x200001c4 = htobe32(0x7f000001);
  *(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;
  syscall(__NR_sendto, r[0], 0x20000dc0, 1, 0x20020003, 0x200001c0, 0x10);
  *(uint64_t*)0x20000180 = 0x20000480;
  *(uint16_t*)0x20000480 = 0x1f;
  *(uint8_t*)0x20000482 = 0;
  *(uint8_t*)0x20000483 = 0;
  *(uint8_t*)0x20000484 = 0;
  *(uint8_t*)0x20000485 = 0;
  *(uint8_t*)0x20000486 = 0;
  *(uint8_t*)0x20000487 = 0;
  *(uint32_t*)0x20000188 = 0x80;
  *(uint64_t*)0x20000190 = 0x20000280;
  *(uint64_t*)0x20000280 = 0x200000c0;
  memcpy((void*)0x200000c0, "\xe3", 1);
  *(uint64_t*)0x20000288 = 1;
  *(uint64_t*)0x20000198 = 1;
  *(uint64_t*)0x200001a0 = 0x20000040;
  *(uint64_t*)0x200001a8 = 0;
  *(uint32_t*)0x200001b0 = 0;
  *(uint32_t*)0x200001b8 = 0;
  syscall(__NR_sendmmsg, r[0], 0x20000180, 1, 0);
}

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