// https://syzkaller.appspot.com/bug?id=6dcd14a729df98f989c7b76d254226ae67084efd
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

#include <stdint.h>
#include <string.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);
  }
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_write
#define __NR_write 4
#endif
#ifndef __NR_read
#define __NR_read 3
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[1];
void loop()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 0x3, 0x32, 0xffffffff, 0x0);
  memcpy((void*)0x20270ff7, "/dev/sg#", 9);
  r[0] = syz_open_dev(0x20270ff7, 0x0, 0x2);
  *(uint8_t*)0x204ce000 = 0x0;
  *(uint8_t*)0x204ce001 = 0x0;
  *(uint16_t*)0x204ce002 = 0x0;
  *(uint16_t*)0x204ce004 = 0x0;
  *(uint16_t*)0x204ce006 = 0x4;
  *(uint16_t*)0x204ce008 = 0x0;
  STORE_BY_BITMASK(uint8_t, 0x204ce00a, 0x0, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x204ce00a, 0x6, 4, 4);
  memcpy((void*)0x204ce00b, "\xc2\x80\x00", 3);
  *(uint16_t*)0x204ce00e = htobe16(0x18);
  *(uint8_t*)0x204ce010 = 0x0;
  *(uint8_t*)0x204ce011 = 0x0;
  *(uint8_t*)0x204ce012 = 0x0;
  *(uint8_t*)0x204ce013 = 0x0;
  *(uint8_t*)0x204ce014 = 0x0;
  *(uint8_t*)0x204ce015 = 0x0;
  *(uint8_t*)0x204ce016 = 0x0;
  *(uint8_t*)0x204ce017 = 0x0;
  *(uint8_t*)0x204ce018 = 0x0;
  *(uint8_t*)0x204ce019 = 0x0;
  *(uint8_t*)0x204ce01a = 0x0;
  *(uint8_t*)0x204ce01b = 0x0;
  *(uint8_t*)0x204ce01c = 0x0;
  *(uint8_t*)0x204ce01d = 0x0;
  *(uint8_t*)0x204ce01e = 0x0;
  *(uint8_t*)0x204ce01f = 0x0;
  *(uint8_t*)0x204ce020 = 0x0;
  *(uint8_t*)0x204ce021 = 0x0;
  *(uint64_t*)0x204ce022 = htobe64(0x0);
  *(uint64_t*)0x204ce02a = htobe64(0x1);
  *(uint8_t*)0x204ce032 = 0x86;
  *(uint8_t*)0x204ce033 = 0x0;
  *(uint16_t*)0x204ce034 = 0x0;
  *(uint16_t*)0x204ce036 = htobe16(0x2);
  *(uint16_t*)0x204ce038 = 0x5;
  *(uint8_t*)0x204ce03a = 0x0;
  *(uint8_t*)0x204ce03b = 0x0;
  *(uint8_t*)0x204ce03c = 0x0;
  *(uint8_t*)0x204ce03d = 0x0;
  *(uint8_t*)0x204ce03e = 0x0;
  *(uint8_t*)0x204ce03f = 0x0;
  *(uint8_t*)0x204ce040 = 0x0;
  *(uint8_t*)0x204ce041 = 0x0;
  *(uint8_t*)0x204ce042 = 0x0;
  *(uint8_t*)0x204ce043 = 0x0;
  *(uint8_t*)0x204ce044 = 0x0;
  *(uint8_t*)0x204ce045 = 0x0;
  *(uint8_t*)0x204ce046 = 0x0;
  *(uint8_t*)0x204ce047 = 0x0;
  *(uint8_t*)0x204ce048 = 0x0;
  *(uint8_t*)0x204ce049 = 0x0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x204ce012, 16);
  csum_inet_update(&csum_1, (const uint8_t*)0x204ce022, 16);
  uint32_t csum_1_chunk_2 = 0x18000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 4);
  uint32_t csum_1_chunk_3 = 0x3a000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x204ce032, 24);
  *(uint16_t*)0x204ce034 = csum_inet_digest(&csum_1);
  syscall(__NR_write, r[0], 0x204ce000, 0x4a);
  syscall(__NR_read, r[0], 0x20db9000, 0x1000);
}

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