// https://syzkaller.appspot.com/bug?id=f9aee1b671ee4c1fbafc98d36a896b996ea9c0bc
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <stdint.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

#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 uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("loop fork failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      test();
      doexit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid)
        break;
      usleep(1000);
      if (current_time_ms() - start > 5 * 1000) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
  }
}

long r[5];
void test()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
  *(uint8_t*)0x2018f000 = -1;
  *(uint8_t*)0x2018f001 = -1;
  *(uint8_t*)0x2018f002 = -1;
  *(uint8_t*)0x2018f003 = -1;
  *(uint8_t*)0x2018f004 = -1;
  *(uint8_t*)0x2018f005 = -1;
  *(uint8_t*)0x2018f006 = 0;
  *(uint8_t*)0x2018f007 = 0;
  *(uint8_t*)0x2018f008 = 0x14;
  *(uint8_t*)0x2018f009 = 0;
  *(uint8_t*)0x2018f00a = 0;
  *(uint8_t*)0x2018f00b = 0;
  *(uint16_t*)0x2018f00c = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x2018f00e, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2018f00e, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x2018f00f, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x2018f00f, 0, 2, 6);
  *(uint16_t*)0x2018f010 = htobe16(0x24);
  *(uint16_t*)0x2018f012 = 0;
  *(uint16_t*)0x2018f014 = htobe16(0);
  *(uint8_t*)0x2018f016 = 0;
  *(uint8_t*)0x2018f017 = 0x11;
  *(uint16_t*)0x2018f018 = 0;
  *(uint8_t*)0x2018f01a = 0xac;
  *(uint8_t*)0x2018f01b = 0x14;
  *(uint8_t*)0x2018f01c = 0;
  *(uint8_t*)0x2018f01d = 0xbb;
  *(uint32_t*)0x2018f01e = htobe32(0xe0000001);
  *(uint16_t*)0x2018f022 = 0;
  *(uint16_t*)0x2018f024 = htobe16(0x4e21);
  *(uint8_t*)0x2018f026 = 4;
  STORE_BY_BITMASK(uint8_t, 0x2018f027, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2018f027, 0, 4, 4);
  *(uint16_t*)0x2018f028 = 0;
  STORE_BY_BITMASK(uint8_t, 0x2018f02a, 0, 0, 1);
  STORE_BY_BITMASK(uint8_t, 0x2018f02a, 0, 1, 4);
  STORE_BY_BITMASK(uint8_t, 0x2018f02a, 0, 5, 3);
  memcpy((void*)0x2018f02b, "\xd7\x3c\xde", 3);
  *(uint8_t*)0x2018f02e = 0;
  memcpy((void*)0x2018f02f, "\xf5\x34\x75", 3);
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x2018f01a, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x2018f01e, 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*)0x2018f022, 16);
  *(uint16_t*)0x2018f028 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x2018f00e, 20);
  *(uint16_t*)0x2018f018 = csum_inet_digest(&csum_2);
  r[0] = syscall(__NR_socket, 2, 2, 0);
  *(uint32_t*)0x20ff6000 = 4;
  syscall(__NR_setsockopt, r[0], 0, 0xa, 0x20ff6000, 4);
  r[1] = syscall(__NR_socket, 0x11, 3, 0x300);
  *(uint16_t*)0x20d6cffc = 0;
  *(uint8_t*)0x20d6cffe = 0;
  *(uint8_t*)0x20d6cfff = 0xfd;
  syscall(__NR_setsockopt, r[1], 0x107, 0x12, 0x20d6cffc, 4);
  *(uint16_t*)0x20fd9ff0 = 2;
  *(uint16_t*)0x20fd9ff2 = htobe16(0x4e20);
  *(uint32_t*)0x20fd9ff4 = htobe32(0);
  *(uint8_t*)0x20fd9ff8 = 0;
  *(uint8_t*)0x20fd9ff9 = 0;
  *(uint8_t*)0x20fd9ffa = 0;
  *(uint8_t*)0x20fd9ffb = 0;
  *(uint8_t*)0x20fd9ffc = 0;
  *(uint8_t*)0x20fd9ffd = 0;
  *(uint8_t*)0x20fd9ffe = 0;
  *(uint8_t*)0x20fd9fff = 0;
  syscall(__NR_sendto, r[0], 0x20865000, 0xffe4, 0, 0x20fd9ff0, 0x10);
  r[2] = syscall(__NR_inotify_init1, 0);
  *(uint32_t*)0x20959000 = 0xc;
  if (syscall(__NR_getsockopt, -1, 1, 0x11, 0x20cc7ff4, 0x20959000) != -1)
    r[3] = *(uint32_t*)0x20cc7ff4;
  syscall(__NR_fcntl, r[2], 8, r[3]);
  if (syscall(__NR_fcntl, r[2], 0x10, 0x20f9cff8) != -1)
    r[4] = *(uint32_t*)0x20f9cffc;
  syscall(__NR_ptrace, 0x4206, r[4], 0, 0x100000);
}

int main()
{
  for (;;) {
    loop();
  }
}