// https://syzkaller.appspot.com/bug?id=ddb673727990990c6ded3e7cc220e39abfc244ab
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.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;
}

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block",
            (uint8_t)a1, (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

long r[50];
void loop()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  memcpy((void*)0x20386ff3,
         "\x2f\x64\x65\x76\x2f\x6e\x65\x74\x2f\x74\x75\x6e\x00", 13);
  r[2] = syz_open_dev(0x20386ff3ul, 0x0ul, 0x801ul);
  *(uint32_t*)0x20b6a000 = (uint32_t)0x3;
  r[4] = syscall(__NR_ioctl, r[2], 0x400454daul, 0x20b6a000ul);
  memcpy((void*)0x20533000,
         "\x02\x00\x00\x00\x04\x00\x00\x00\x00\x04\x00\x80\x00\xe9\xbc"
         "\x22",
         16);
  *(uint32_t*)0x20533010 = (uint32_t)0x10001;
  *(uint32_t*)0x20533014 = (uint32_t)0x0;
  *(uint64_t*)0x20533018 = (uint64_t)0x20012fe8;
  *(uint32_t*)0x20012fe8 = (uint32_t)0x0;
  *(uint32_t*)0x20012fec = (uint32_t)0x0;
  *(uint32_t*)0x20012ff0 = (uint32_t)0x0;
  *(uint32_t*)0x20012ff4 = (uint32_t)0x0;
  *(uint32_t*)0x20012ff8 = (uint32_t)0x0;
  *(uint16_t*)0x20012ffc = (uint16_t)0x5;
  *(uint16_t*)0x20012ffe = (uint16_t)0x0;
  r[16] = syscall(__NR_ioctl, r[2], 0x400454caul, 0x20533000ul);
  *(uint8_t*)0x20f01000 = (uint8_t)0xaa;
  *(uint8_t*)0x20f01001 = (uint8_t)0xaa;
  *(uint8_t*)0x20f01002 = (uint8_t)0xaa;
  *(uint8_t*)0x20f01003 = (uint8_t)0xaa;
  *(uint8_t*)0x20f01004 = (uint8_t)0xaa;
  *(uint8_t*)0x20f01005 = (uint8_t)0x0;
  memcpy((void*)0x20f01006, "\x7c\x02\xaa\x24\xbf\xdb", 6);
  *(uint16_t*)0x20f0100c = (uint16_t)0x8;
  STORE_BY_BITMASK(uint8_t, 0x20f0100e, 0x5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x20f0100e, 0x4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x20f0100f, 0x0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x20f0100f, 0x0, 2, 6);
  *(uint16_t*)0x20f01010 = (uint16_t)0x1c00;
  *(uint16_t*)0x20f01012 = (uint16_t)0x6400;
  *(uint16_t*)0x20f01014 = (uint16_t)0x0;
  *(uint8_t*)0x20f01016 = (uint8_t)0x0;
  *(uint8_t*)0x20f01017 = (uint8_t)0x411;
  *(uint16_t*)0x20f01018 = (uint16_t)0x0;
  *(uint8_t*)0x20f0101a = (uint8_t)0xac;
  *(uint8_t*)0x20f0101b = (uint8_t)0x14;
  *(uint8_t*)0x20f0101c = (uint8_t)0x0;
  *(uint8_t*)0x20f0101d = (uint8_t)0xbb;
  *(uint8_t*)0x20f0101e = (uint8_t)0xac;
  *(uint8_t*)0x20f0101f = (uint8_t)0x14;
  *(uint8_t*)0x20f01020 = (uint8_t)0x0;
  *(uint8_t*)0x20f01021 = (uint8_t)0xaa;
  *(uint16_t*)0x20f01022 = (uint16_t)0x204e;
  *(uint16_t*)0x20f01024 = (uint16_t)0x224e;
  *(uint16_t*)0x20f01026 = (uint16_t)0x800;
  *(uint16_t*)0x20f01028 = (uint16_t)0x0;
  struct csum_inet csum_47;
  csum_inet_init(&csum_47);
  csum_inet_update(&csum_47, (const uint8_t*)0x20f0101a, 4);
  csum_inet_update(&csum_47, (const uint8_t*)0x20f0101e, 4);
  uint16_t csum_47_chunk_2 = 0x1100;
  csum_inet_update(&csum_47, (const uint8_t*)&csum_47_chunk_2, 2);
  uint16_t csum_47_chunk_3 = 0x800;
  csum_inet_update(&csum_47, (const uint8_t*)&csum_47_chunk_3, 2);
  csum_inet_update(&csum_47, (const uint8_t*)0x20f01022, 8);
  *(uint16_t*)0x20f01028 = csum_inet_digest(&csum_47);
  struct csum_inet csum_48;
  csum_inet_init(&csum_48);
  csum_inet_update(&csum_48, (const uint8_t*)0x20f0100e, 20);
  *(uint16_t*)0x20f01018 = csum_inet_digest(&csum_48);
}

int main()
{
  loop();
  return 0;
}