// https://syzkaller.appspot.com/bug?id=3871fa3807e9588df440bc83440638d52811160e
// 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;
  for (i = 0; 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;
  int collide = 0;
again:
  for (call = 0; call < 44; 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 (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

#ifndef SYS_semctl
#define SYS_semctl 295
#endif

uint64_t r[8] = {
    0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0, 0x0,
    0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000040, "./file0\000", 8);
    res = syscall(SYS_open, 0x20000040, 0x40000400000002c2, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    memcpy((void*)0x20000100, "\xc3", 1);
    syscall(SYS_pwrite, r[0], 0x20000100, 0xa322c749, 0, 1);
    break;
  case 2:
    *(uint32_t*)0x20000080 = 0;
    *(uint32_t*)0x20000084 = 0;
    *(uint32_t*)0x20000088 = 2;
    *(uint32_t*)0x2000008c = 0;
    memcpy((void*)0x20000090,
           "\xad\x0d\xfa\xf4\xe8\x56\x58\x3a\x05\xfe\xa2\xb7\xbe\x83\x64\xce"
           "\xef\x29\xc3\x7f",
           20);
    *(uint32_t*)0x200000a4 = 0;
    *(uint32_t*)0x200000a8 = 0;
    syscall(SYS_ioctl, -1, 0x802c7415, 0x20000080);
    break;
  case 3:
    memcpy((void*)0x20000040, "./file0\000", 8);
    res = syscall(SYS_open, 0x20000040, 0x70e, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    syscall(SYS_mmap, 0x20000000, 0x13000, 5, 0x10, r[1], 0, 0);
    break;
  case 5:
    syscall(SYS_pwritev, -1, 0, 0, 0, 0);
    break;
  case 6:
    syscall(SYS_pwritev, -1, 0, 0, 0, 0);
    break;
  case 7:
    syscall(SYS_mmap, 0x20000000, 0x13000, 5, 0x10, -1, 0, 0);
    break;
  case 8:
    res = syscall(SYS_open, 0, 0x600, 0x11);
    if (res != -1)
      r[2] = res;
    break;
  case 9:
    syscall(SYS_ioctl, r[2], 0x80044275, 0);
    break;
  case 10:
    syscall(SYS_getpid);
    break;
  case 11:
    res = syscall(SYS_msgget, 0x798e7453, 0x446);
    if (res != -1)
      r[3] = res;
    break;
  case 12:
    res = syscall(SYS_semget, 0, 1, 0x100);
    if (res != -1)
      r[4] = res;
    break;
  case 13:
    syscall(SYS_getsockopt, -1, 0xffff, 0x1022, 0, 0);
    break;
  case 14:
    syscall(SYS_getsockopt, -1, 0xffff, 0x1022, 0, 0);
    break;
  case 15:
    syscall(SYS_semctl, r[4], 0, 1, 0);
    break;
  case 16:
    syscall(SYS_msgctl, r[3], 1, 0);
    break;
  case 17:
    syscall(SYS_getgroups, 0, 0);
    break;
  case 18:
    syscall(SYS_mmap, 0x20000000, 0x13000, 5, 0x10, -1, 0, 0);
    break;
  case 19:
    syscall(SYS_mmap, 0x20000000, 0x13000, 5, 0x10, -1, 0, 0);
    break;
  case 20:
    syscall(SYS_setsockopt, -1, 0, 0x6a, 0, 0);
    break;
  case 21:
    res = syscall(SYS_semget, 0, 1, 0x100);
    if (res != -1)
      r[5] = res;
    break;
  case 22:
    syscall(SYS_getsockopt, -1, 0xffff, 0x1022, 0, 0);
    break;
  case 23:
    syscall(SYS_semop, r[5], 0, 0);
    break;
  case 24:
    syscall(SYS_semctl, r[5], 0, 1, 0);
    break;
  case 25:
    syscall(SYS_getpid);
    break;
  case 26:
    syscall(SYS_getgid);
    break;
  case 27:
    syscall(SYS_pwritev, -1, 0, 0, 0, 0);
    break;
  case 28:
    syscall(SYS_mmap, 0x20000000, 0x13000, 5, 0x10, -1, 0, 0);
    break;
  case 29:
    syscall(SYS_kqueue);
    break;
  case 30:
    res = syscall(SYS_open, 0, 0x70e, 0);
    if (res != -1)
      r[6] = res;
    break;
  case 31:
    syscall(SYS_pwritev, r[6], 0, 0, 0, 0);
    break;
  case 32:
    res = syscall(SYS_open, 0, 0x600, 0x11);
    if (res != -1)
      r[7] = res;
    break;
  case 33:
    syscall(SYS_ioctl, r[7], 0x80085761, 0);
    break;
  case 34:
    syscall(SYS_ioctl, r[7], 0x80044275, 0);
    break;
  case 35:
    syscall(SYS_getsockopt, -1, 0xffff, 0x1022, 0, 0);
    break;
  case 36:
    syscall(SYS_writev, -1, 0, 0);
    break;
  case 37:
    syscall(SYS_semget, 0, 1, 0x100);
    break;
  case 38:
    syscall(SYS_getgid);
    break;
  case 39:
    syscall(SYS_getpid);
    break;
  case 40:
    syscall(SYS_sendmsg, r[1], 0, 2);
    break;
  case 41:
    syscall(SYS_mlock, 0x20003000, 0x400000);
    break;
  case 42:
    syscall(SYS_mmap, 0x20ff9000, 0x4000, 0, 0x810, r[0], 0, 0);
    break;
  case 43:
    syscall(SYS_ftruncate, r[0], 0, 0);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000, 0x1000000, 3, 0x1012, -1, 0, 0);
  loop();
  return 0;
}