// https://syzkaller.appspot.com/bug?id=4aa4ac47afdabcafecf928c8c6eb43ccddce4e77
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

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 (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void loop(void)
{
  int i, call, thread;
  for (call = 0; call < 10; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (call == 7)
        break;
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 0xaul, 6ul, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20000000 = 0xa;
    *(uint16_t*)0x20000002 = htobe16(0x4e20);
    *(uint32_t*)0x20000004 = htobe32(0);
    memset((void*)0x20000008, 0, 16);
    *(uint32_t*)0x20000018 = 0;
    syscall(__NR_bind, r[0], 0x20000000ul, 0x1cul);
    break;
  case 2:
    res = syscall(__NR_socket, 2ul, 6ul, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    syscall(__NR_listen, r[0], 6);
    break;
  case 4:
    memset((void*)0x201c9fff, 3, 1);
    syscall(__NR_setsockopt, r[1], 0x10d, 0xd, 0x201c9ffful, 1ul);
    break;
  case 5:
    *(uint16_t*)0x200000c0 = 2;
    *(uint16_t*)0x200000c2 = htobe16(0x4e20);
    *(uint32_t*)0x200000c4 = htobe32(0);
    syscall(__NR_connect, r[1], 0x200000c0ul, 0x10ul);
    break;
  case 6:
    res = syscall(__NR_accept, r[0], 0ul, 0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    *(uint64_t*)0x20000400 = 0;
    *(uint32_t*)0x20000408 = 0;
    *(uint64_t*)0x20000410 = 0x20000300;
    *(uint64_t*)0x20000300 = 0x20000200;
    *(uint64_t*)0x20000200 = -1;
    *(uint64_t*)0x20000308 = 3;
    *(uint64_t*)0x20000418 = 1;
    *(uint64_t*)0x20000420 = 0;
    *(uint64_t*)0x20000428 = 0;
    *(uint32_t*)0x20000430 = 0x400c0;
    syscall(__NR_sendmsg, r[2], 0x20000400ul, 0ul);
    {
      int i;
      for (i = 0; i < 64; i++) {
        syscall(__NR_sendmsg, r[2], 0x20000400ul, 0ul);
      }
    }
    break;
  case 8:
    *(uint64_t*)0x20000580 = 0;
    *(uint32_t*)0x20000588 = 0;
    *(uint64_t*)0x20000590 = 0x20000140;
    *(uint64_t*)0x20000140 = 0x20000640;
    memcpy(
        (void*)0x20000640,
        "\x0b\x2a\x68\xc1\xec\x35\x6b\x95\x1c\xc8\x8f\x8a\xfc\xff\x93\xf5\x87"
        "\x0d\x26\xfd\xbe\x8a\xce\xd0\x0d\xb8\x42\xd7\x8e\xbe\x5f\x2c\x63\xee"
        "\xa1\x8d\xd0\x32\x00\xeb\xe8\xb4\x13\x2b\x7d\x2b\x06\xdb\xf7\x89\xd4"
        "\xfe\x48\x0a\xe9\x2d\xdf\x36\xfc\x47\x17\x2e\xa4\xdc\xb9\x5b\x6c\xf5"
        "\xef\x14\x44\xe0\x1c\xc6\xd7\x73\xd9\xd0\x24\x9e\xe8\x90\xcc\x08\xba"
        "\xf1\x20\xa2\x82\x90\x27\x99\xd2\x35\x0b\x25\x2c\xd8\x9c\x1e\x5b\xc8"
        "\xa6\xfd\x91\x37\x84\x7c\x7b\xc5\x78\x9d\xf1\x29\x77\x88\xa0\x96\xa2"
        "\xa5\xb3\x87\xb1\xb0\xe0\xf6\x86\xf2\x16\x00\x77\xfa\x03\x2d\x01\x33"
        "\xaa\x59\x99\xfd\xd5\x61\x96\xf8\x22\x0c\xe0\xd0\x8d\x14\x74\xfa\x99"
        "\x6b\x6a\x00\x7f\xdc\x9d\xa5\x63",
        161);
    *(uint64_t*)0x20000148 = 0xa1;
    *(uint64_t*)0x20000598 = 1;
    *(uint64_t*)0x200005a0 = 0;
    *(uint64_t*)0x200005a8 = 0;
    *(uint32_t*)0x200005b0 = 0;
    *(uint32_t*)0x200005b8 = 0;
    *(uint64_t*)0x200005c0 = 0;
    *(uint32_t*)0x200005c8 = 0;
    *(uint64_t*)0x200005d0 = 0;
    *(uint64_t*)0x200005d8 = 0;
    *(uint64_t*)0x200005e0 = 0;
    *(uint64_t*)0x200005e8 = 0;
    *(uint32_t*)0x200005f0 = 0;
    *(uint32_t*)0x200005f8 = 0;
    syscall(__NR_sendmmsg, r[1], 0x20000580ul, 2ul, 0x804ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_sendmmsg, r[1], 0x20000580ul, 2ul, 0x804ul);
      }
    }
    break;
  case 9:
    syscall(__NR_socket, 0xaul, 1ul, 0);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  loop();
  return 0;
}