// https://syzkaller.appspot.com/bug?id=7ef63c67437650b80e78a4da4bd1d4b3d1fa8bc9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <time.h>
#include <unistd.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 {
  pthread_mutex_t mu;
  pthread_cond_t cv;
  int state;
} event_t;

static void event_init(event_t* ev)
{
  if (pthread_mutex_init(&ev->mu, 0))
    exit(1);
  if (pthread_cond_init(&ev->cv, 0))
    exit(1);
  ev->state = 0;
}

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

static void event_set(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  if (ev->state)
    exit(1);
  ev->state = 1;
  pthread_mutex_unlock(&ev->mu);
  pthread_cond_broadcast(&ev->cv);
}

static void event_wait(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  while (!ev->state)
    pthread_cond_wait(&ev->cv, &ev->mu);
  pthread_mutex_unlock(&ev->mu);
}

static int event_isset(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  pthread_mutex_lock(&ev->mu);
  for (;;) {
    if (ev->state)
      break;
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
    now = current_time_ms();
    if (now - start > timeout)
      break;
  }
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

#define __syscall syscall

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 < 3; 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);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    syscall(SYS_sendmsg, -1, 0ul, 0ul);
    break;
  case 1:
    res = syscall(SYS_socket, 0x18ul, 1ul, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    *(uint64_t*)0x20000380 = 0;
    *(uint32_t*)0x20000388 = 0;
    *(uint64_t*)0x20000390 = 0;
    *(uint64_t*)0x20000398 = 0;
    *(uint64_t*)0x200003a0 = 0x200001c0;
    *(uint64_t*)0x200001c0 = 0xc8;
    *(uint32_t*)0x200001c8 = 0xffff;
    *(uint32_t*)0x200001cc = 0x80000001;
    memcpy(
        (void*)0x200001d0,
        "\x10\x41\x69\x7e\x06\x35\xb3\x42\xed\xdd\x21\x15\xde\xec\x3a\x61\x0d"
        "\x3b\x28\xdb\x7c\x4f\x76\x6e\x1c\x61\x9d\x25\xc6\x92\xdb\x8f\x29\x9b"
        "\x98\x8d\xcb\x4b\x41\x05\x20\x1b\x67\x3f\xe3\x6f\xe5\x67\x37\x86\x9e"
        "\x41\x8c\xe0\xe8\x6a\x61\x56\x81\xae\xb7\x08\x22\x3e\x5f\xb1\xc3\xfe"
        "\x57\xb2\xe9\x3e\x1a\x79\x97\x88\x24\x3d\xf5\x3c\x01\x29\xb0\xea\x69"
        "\x7a\xdc\x25\x16\x28\x15\xe7\x71\x12\x49\x35\x88\xa7\x73\xe0\x30\xb5"
        "\xc0\xbc\xae\xff\x02\x48\xd2\x22\x73\x99\xa0\x5b\xd3\x69\x54\x81\x05"
        "\x2a\xc7\xce\xc2\x27\xbe\x7b\xc9\xab\xf7\xa6\xac\xc5\xcd\xab\x24\x10"
        "\x5b\x3d\x97\x1f\x36\x17\x72\xc1\x02\x1f\xb1\x6f\x33\x02\x80\xf3\x6b"
        "\x94\x90\xe3\xfb\x63\xf4\x41\x9f\xc0\x2c\x6d\xe8\x99\x56\x0b\x5e\xae"
        "\x66\xd9\x1c\x27\x6e\x2f\xca\x2e\x05\x74\x72\x0d\x30",
        183);
    *(uint64_t*)0x200003a8 = 0xc8;
    *(uint32_t*)0x200003b0 = 0;
    syscall(SYS_sendmsg, r[0], 0x20000380ul, 0ul);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul);
  loop();
  return 0;
}