// https://syzkaller.appspot.com/bug?id=4a4aa69289b2e7242400ee260a9e8fef40e12c44
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <sys/types.h>

#include <errno.h>
#include <pthread.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/endian.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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;
}

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 execute_one(void)
{
  int i, call, thread;
  for (call = 0; call < 7; 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 == 2 || call == 3)
        break;
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint64_t*)0x20000400 = 0x20000040;
    *(uint8_t*)0x20000040 = 0x1c;
    *(uint8_t*)0x20000041 = 0x1c;
    *(uint16_t*)0x20000042 = htobe16(0x4e23);
    *(uint32_t*)0x20000044 = 0;
    *(uint8_t*)0x20000048 = 0xfe;
    *(uint8_t*)0x20000049 = 0x80;
    memset((void*)0x2000004a, 0, 12);
    *(uint8_t*)0x20000056 = 0;
    *(uint8_t*)0x20000057 = 0xbb;
    *(uint32_t*)0x20000058 = 0;
    *(uint32_t*)0x20000408 = 0x1c;
    *(uint64_t*)0x20000410 = 0;
    *(uint32_t*)0x20000418 = 0;
    *(uint64_t*)0x20000420 = 0;
    *(uint32_t*)0x20000428 = 0;
    *(uint32_t*)0x2000042c = 0;
    syscall(SYS_sendmsg, r[0], 0x20000400ul, 0ul);
    break;
  case 2:
    *(uint32_t*)0x200002c0 = 0x1410002;
    syscall(SYS_setsockopt, r[0], 0x84, 0x1b, 0x200002c0ul, 4ul);
    break;
  case 3:
    *(uint64_t*)0x20000200 = 0;
    *(uint32_t*)0x20000208 = 0;
    *(uint64_t*)0x20000210 = 0x200000c0;
    *(uint64_t*)0x200000c0 = 0x20000140;
    memcpy(
        (void*)0x20000140,
        "\xa8\x0c\x68\xb7\x35\x1e\x42\x88\x5d\xe0\xc8\x57\x51\xfd\x45\x19\x1f"
        "\xde\x32\xfa\x27\x9a\xe1\x2f\xd0\x3e\x2f\xf0\xc3\x80\x9b\xcd\x22\x42"
        "\x5e\xbf\xd8\xd5\x7c\x0c\xa9\x6a\xf9\xd4\xd6\xe1\xbe\x63\xfe\xc5\xd2"
        "\x07\x5e\x48\x1b\xf9\xfd\x15\x00\xb8\x75\x1f\xc7\xa8\x19\x3d\x39\x58"
        "\xb9\x4f\x45\xc0\xef\x98\xbe\xef\x7f\xe8\xd1\x83\x50\xe9\x8d\xa9\x99"
        "\x78\xb9\xf9\xcf\x98\x18\xce\xd7\x2a\xe3\x8a\x4d\x1a\x13\x73\x74\x28"
        "\x7d\x2e\xef\x56\x75\xb2\xbb\x48\x39\x95\x30\x27\xae\xf9\x7f\x42\x09"
        "\xbb\xd7\xf2\xbb\x7e\xf8\x43\xf2\x5b\x0d\x10\xf9\x84\xc0\x4f\xd2\xc4"
        "\xf8\xfa\x01\xfc\x4c\x21\x8d\x64\xa6\x17",
        146);
    *(uint64_t*)0x200000c8 = 0x92;
    *(uint64_t*)0x200000d0 = 0;
    *(uint64_t*)0x200000d8 = 0;
    *(uint32_t*)0x20000218 = 2;
    *(uint64_t*)0x20000220 = 0;
    *(uint32_t*)0x20000228 = 0x6c;
    *(uint32_t*)0x2000022c = 0;
    syscall(SYS_sendmsg, r[0], 0x20000200ul, 0x84ul);
    break;
  case 4:
    *(uint64_t*)0x200003c0 = 0;
    *(uint32_t*)0x200003c8 = 0;
    *(uint64_t*)0x200003d0 = 0x20000240;
    *(uint64_t*)0x20000240 = 0x20000100;
    memset((void*)0x20000100, 95, 1);
    *(uint64_t*)0x20000248 = 1;
    *(uint32_t*)0x200003d8 = 1;
    *(uint64_t*)0x200003e0 = 0;
    *(uint32_t*)0x200003e8 = 0;
    *(uint32_t*)0x200003ec = 0;
    syscall(SYS_sendmsg, r[0], 0x200003c0ul, 0ul);
    break;
  case 5:
    *(uint16_t*)0x20000000 = 1;
    *(uint16_t*)0x20000002 = 0;
    *(uint32_t*)0x20000004 = 0;
    *(uint32_t*)0x20000008 = 0;
    *(uint32_t*)0x2000000c = 0;
    syscall(SYS_setsockopt, r[0], 0x84, 0x21, 0x20000000ul, 0x10ul);
    break;
  case 6:
    memset((void*)0x20000580, 203, 1);
    syscall(SYS_sendto, r[0], 0x20000580ul, 1ul, 0ul, 0ul, 0ul);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
  loop();
  return 0;
}