// https://syzkaller.appspot.com/bug?id=f82f8fba49a7138ffc83001e6ca9a19d6d9c4955
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.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/resource.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#ifndef SYS_mmap
#define SYS_mmap 197
#endif
#ifndef SYS_openat
#define SYS_openat 468
#endif
#ifndef SYS_write
#define SYS_write 4
#endif

static unsigned long long procid;

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;
}

static void sandbox_common()
{
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
}

static void loop();

static int do_sandbox_none(void)
{
  sandbox_common();
  loop();
  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 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);
      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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    memcpy((void*)0x20000180, "./file0\000", 8);
    syscall(SYS_openat, 0xffffff9c, 0x20000180ul, 0x200ul, 0ul);
    break;
  case 1:
    memcpy((void*)0x20000040, "./file0\000", 8);
    res = syscall(SYS_openat, 0xffffff9c, 0x20000040ul, 0x1c1401ul, 0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    memcpy((void*)0x2000c380, "./file0\000", 8);
    res = syscall(SYS_openat, 0xffffff9c, 0x2000c380ul, 0x8f0801ul, 0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    memcpy((void*)0x20001640, "/proc/self/exe\000", 15);
    res = syscall(SYS_openat, -1, 0x20001640ul, 0ul, 0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 4:
    syscall(SYS_mmap, 0x20000000ul, 0x800000ul, 1ul, 0x10ul, r[2], 0ul, 0ul);
    break;
  case 5:
    memset((void*)0x20004200, 116, 1);
    syscall(SYS_write, r[1], 0x20004200ul, 0x11523ul);
    break;
  case 6:
    memcpy(
        (void*)0x20000200,
        "\x71\x27\x24\x3b\xab\x06\x6f\x38\xbc\xb3\xdf\xcc\x66\x99\x24\xee\x75"
        "\x17\x1b\x21\x7a\x06\xd0\x7b\xf8\x6f\xb2\x5a\x5a\xce\xee\x4e\xdb\x56"
        "\xf0\x06\x84\xcc\x32\x33\x2d\x13\x66\x7a\xeb\xeb\xb3\x25\x68\xe4\x84"
        "\x57\x74\xac\x9d\xa4\x58\x38\xf2\xbb\x65\xed\xbf\x69\x5f\xe9\xd5\x00"
        "\xb4\x6c\x73\x08\xcd\xe1\x1d\xe3\x83\x4b\x1a\x43\xf6\x82\xf9\x40\xd2"
        "\x35\xb5\x7c\xd0\x91\xde\x12\x95\x42\xe6\x91\xd9\x39\x15\x31\x4d\xf0"
        "\xa4\x7a\xe1\x94\xa5\xa1\x07\xf9\x9e\x6a\x96\xa7\x45\x4a\x35\xf5\x89"
        "\x99\x54\x4f\xf9\x40\xac\x22\x53\x1e\xbe\x5d\x02\xe2\xbb\x80\xdc\xe4"
        "\x96\xac\x23\x04\x47\xc3\x05\x1d\x9f\xa9\x52\xd4\xb3\xa8\x9d\x47\x07"
        "\xb5\xb2\x39\x1d\x31\x92\xd3\x26\x95\x07\x04\xe2\x90\x6c\xf4\x50\xca"
        "\xcb\x7c\xe0\xbb\xcd\x8f\x1a\xb5\xba\xcd\x62\xf2\x8a\x1f\x48\x5c\x8b"
        "\x8f\x61\x87\x74\x60\xa4\xb7\x99\x1a\xea\x70\xa7\x67\x6a\x4a\x21\x5d"
        "\xce\xca\xc4\xbd\x67\x9c\x9e\xf9\xbd\x81\x36\x8d\x01\x88\x0c\xdf\x2c"
        "\xcd\x0f\xa8\xa2\x56\x92\x49\x0f\x86\x4f\xb9\xfd\x0d\x41\x2f\xd3\x37"
        "\xc2\x14\x0d\x67\x1f\x80\xa7\x95\x2e\xa6\x1c\x50\xfa\x72\x0f\x31\x66"
        "\x9e\xdc\xf1\x31\xcd\x41\xc3\x4d\xf9\x3f\x41\xf5\xe6\x3c\xb7\x6d\xde"
        "\xbb\x0e\xaf\xc7\x0f\x68\x5e\x57\x68\xd9\xd6\x68\xef\x6a\x33\x8f\x38"
        "\x3c\x11\x55\xbd\xb6\xd7\x39\x7d\xf9\x91\x86\x10\x18\x70\x9a\x05\x88"
        "\x32\x37\x91\x9c\xe4\xea\xad\x4d\xf7\x59\xd9\xc2\x74\xe8\xb7\x99\x56"
        "\x38\x03\x02\x10\xb1\xe0\xeb\x28\x81\xb0\xf2\x74\xdd\x9f\x53\x4b\xbe"
        "\xcc\x62\xc4\x43\xf2\x54\xc7\x27\x23\xd9\xf7\x9e\x1c\xd2\x28\x43\x2b"
        "\xbe\xaf\x1c\xee\x02\xd4\xad\xfa\xef\xed\x4e\xa7\x4a\x06\x6e\x6b\x4b"
        "\x9e\x0b\x57\xde\x7b\xd9\xaf\xa8\xcc\x5f\x88\xb9\xba\x2b\x29\x0f\xe9"
        "\xbb\xdd\x9e\x79\xa0\xd7\x61\xd2\x2b\x41\x12\x1d\x0a\x56\x29\x04\x9e"
        "\x00\xf0\x45\x26\xd9\xc5\x59\x13\xbe\xef\x70\x04\x59\x4b\xa7\xe8\x19"
        "\x81\x24\x62\x61\x49\xcf\xcb\xde\x25\x7e\x9f\x48\x31\x37\x2c\x23\xc6"
        "\xdc\x4c\x1d\x0f\x4c\xb7\x56\xd2\x6a\x47\xfe\xbf\xd8\x39\x5c\x38\x80"
        "\xec\x10\xcc\xce\x8b\x0d\x6a\xdb\xac\x5b\xdd\x9d\x13\x3c\x98\xc2\xaa"
        "\x9e\xf5\x96\x39\x02\x4f\x1a\xa7\x46\xea\x1c\x5d\xed\xf0\xaf\x5f\xcd"
        "\x80\x03\x01\x62\xe8\x03\x64\x60\x9d\xc9\xf4\x15\x2e\x8a\x9d\x18\x93"
        "\x9a\x1c",
        512);
    syscall(SYS_write, r[0], 0x20000200ul, 0x200ul);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}