// https://syzkaller.appspot.com/bug?id=de316389db0fa0cd7ced6e564601ea8e56625ebc
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/syscall.h>
#include <unistd.h>

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

static void use_temporary_dir()
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

struct thread_t {
  int created, running, call;
  pthread_t th;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[7] = {0xffffffffffffffff, 0x0,
                 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 0xa, 1, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    syscall(__NR_ioctl, r[0], 0x8912, 0x20000000);
    break;
  case 2:
    *(uint32_t*)0x200000c0 = 0;
    *(uint16_t*)0x200000c8 = 0xa;
    *(uint16_t*)0x200000ca = htobe16(0x4e23);
    *(uint32_t*)0x200000cc = 0xd8;
    *(uint8_t*)0x200000d0 = -1;
    *(uint8_t*)0x200000d1 = 1;
    *(uint8_t*)0x200000d2 = 0;
    *(uint8_t*)0x200000d3 = 0;
    *(uint8_t*)0x200000d4 = 0;
    *(uint8_t*)0x200000d5 = 0;
    *(uint8_t*)0x200000d6 = 0;
    *(uint8_t*)0x200000d7 = 0;
    *(uint8_t*)0x200000d8 = 0;
    *(uint8_t*)0x200000d9 = 0;
    *(uint8_t*)0x200000da = 0;
    *(uint8_t*)0x200000db = 0;
    *(uint8_t*)0x200000dc = 0;
    *(uint8_t*)0x200000dd = 0;
    *(uint8_t*)0x200000de = 0;
    *(uint8_t*)0x200000df = 1;
    *(uint32_t*)0x200000e0 = 0x1f;
    *(uint16_t*)0x20000148 = 7;
    *(uint16_t*)0x2000014a = 0xeb8;
    *(uint32_t*)0x20000000 = 0x90;
    res = syscall(__NR_getsockopt, -1, 0x84, 0x1f, 0x200000c0, 0x20000000);
    if (res != -1)
      r[1] = *(uint32_t*)0x200000c0;
    break;
  case 3:
    memcpy((void*)0x200001c0, "/dev/ppp", 9);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200001c0, 0x60401, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 4:
    syscall(__NR_setsockopt, r[2], 0, 0x60, 0x20000440, 1);
    break;
  case 5:
    *(uint32_t*)0x20000040 = r[1];
    *(uint32_t*)0x20000044 = 7;
    *(uint32_t*)0x20000180 = 8;
    syscall(__NR_getsockopt, -1, 0x84, 0x71, 0x20000040, 0x20000180);
    break;
  case 6:
    *(uint32_t*)0x20000380 = 0x80;
    res = syscall(__NR_accept4, -1, 0x200003c0, 0x20000380, 0);
    if (res != -1)
      r[3] = res;
    break;
  case 7:
    *(uint32_t*)0x20000080 = 0;
    syscall(__NR_accept4, r[3], 0, 0x20000080, 0);
    break;
  case 8:
    memcpy((void*)0x200000c0, "/selinux/status", 16);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200000c0, 0, 0);
    if (res != -1)
      r[4] = res;
    break;
  case 9:
    syscall(__NR_ioctl, r[4], 0x540b, 0);
    break;
  case 10:
    syscall(__NR_mmap, 0x20002000, 0x3000, 0, 0x12, -1, 0);
    break;
  case 11:
    memcpy((void*)0x20000000, "-$", 3);
    *(uint64_t*)0x20664fc0 = 0;
    *(uint64_t*)0x20664fc8 = 1;
    *(uint64_t*)0x20664fd0 = 0;
    *(uint64_t*)0x20664fd8 = 0;
    *(uint64_t*)0x20664fe0 = 0;
    *(uint64_t*)0x20664fe8 = 0;
    *(uint64_t*)0x20664ff0 = 0;
    *(uint64_t*)0x20664ff8 = 0;
    syscall(__NR_mq_open, 0x20000000, 0, 0, 0x20664fc0);
    break;
  case 12:
    *(uint32_t*)0x20000200 = 2;
    syscall(__NR_setsockopt, r[0], 0x29, 1, 0x20000200, 4);
    break;
  case 13:
    syscall(__NR_mmap, 0x20000000, 0xe7e000, 0, 0x8010, -1, 0);
    break;
  case 14:
    syscall(__NR_keyctl, 0x10, 0);
    break;
  case 15:
    res = syscall(__NR_socket, 0xa, 2, 0);
    if (res != -1)
      r[5] = res;
    break;
  case 16:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[6] = res;
    break;
  case 17:
    *(uint16_t*)0x205fafd2 = 0x18;
    *(uint32_t*)0x205fafd4 = 1;
    *(uint32_t*)0x205fafd8 = 0;
    *(uint32_t*)0x205fafdc = r[5];
    *(uint16_t*)0x205fafe0 = 2;
    *(uint16_t*)0x205fafe2 = htobe16(0);
    *(uint32_t*)0x205fafe4 = htobe32(0xe0000002);
    *(uint8_t*)0x205fafe8 = 0;
    *(uint8_t*)0x205fafe9 = 0;
    *(uint8_t*)0x205fafea = 0;
    *(uint8_t*)0x205fafeb = 0;
    *(uint8_t*)0x205fafec = 0;
    *(uint8_t*)0x205fafed = 0;
    *(uint8_t*)0x205fafee = 0;
    *(uint8_t*)0x205fafef = 0;
    *(uint32_t*)0x205faff0 = 4;
    *(uint32_t*)0x205faff4 = 0;
    *(uint32_t*)0x205faff8 = 2;
    *(uint32_t*)0x205faffc = 0;
    syscall(__NR_connect, r[6], 0x205fafd2, 0x2e);
    break;
  case 18:
    syscall(__NR_close, r[5]);
    break;
  case 19:
    syscall(__NR_close, r[6]);
    break;
  }
}

void loop()
{
  execute(20);
}

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