// https://syzkaller.appspot.com/bug?id=d770685c526dba78a4c4ee5881d05c2042a68868
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.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/event.h>
#include <sys/ioctl.h>
#include <sys/ktrace.h>
#include <sys/mman.h>
#include <sys/msg.h>
#include <sys/resource.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/types.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 use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

static void __attribute__((noinline)) remove_dir(const char* dir)
{
  DIR* dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EACCES) {
      if (rmdir(dir))
        exit(1);
      return;
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    if (unlink(filename)) {
      exit(1);
    }
  }
  closedir(dp);
  while (rmdir(dir)) {
    exit(1);
  }
}

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 CAST

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 < 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 == 4 || call == 5 || call == 6 || call == 7 || call == 8)
        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++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      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;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[2] = {0x0, 0x0};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = -1;
    res = ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(semget))(
        /*key=*/0, /*nsems=*/2, /*flags=*/0x148);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint32_t*)0x20000100 = 0x20;
    *(uint32_t*)0x20000104 = -1;
    *(uint32_t*)0x20000108 = 0;
    *(uint32_t*)0x2000010c = 0;
    *(uint32_t*)0x20000110 = -1;
    *(uint32_t*)0x20000114 = 0x1a2;
    *(uint16_t*)0x20000118 = 1;
    *(uint16_t*)0x2000011a = 0;
    *(uint64_t*)0x20000120 = 0;
    *(uint64_t*)0x20000128 = 0;
    *(uint64_t*)0x20000130 = 0x51e;
    *(uint64_t*)0x20000138 = 9;
    *(uint64_t*)0x20000140 = 0x80000001;
    *(uint64_t*)0x20000148 = 0;
    *(uint64_t*)0x20000150 = 0;
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t))CAST(semctl))(
        /*semid=*/r[0], /*semnum=*/0, /*cmd=*/1, /*arg=*/0x20000100);
    break;
  case 2:
    ((intptr_t(*)())CAST(getpid))();
    break;
  case 3:
    res = -1;
    res =
        ((intptr_t(*)(intptr_t, intptr_t))CAST(msgget))(/*key=*/0, /*flags=*/0);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    sprintf((char*)0x20000100, "0x%016llx", (long long)r[1]);
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t))CAST(msgsnd))(
        /*msqid=*/0, /*msgp=*/0x20000100, /*sz=*/0x401, /*flags=*/0);
    break;
  case 5:
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t))CAST(msgsnd))(
        /*msqid=*/r[1], /*msgp=*/0, /*sz=*/0xb5, /*flags=*/0x800);
    break;
  case 6:
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t, intptr_t))CAST(
        msgrcv))(/*msqid=*/r[1], /*msgp=*/0x20002700, /*sz=*/0x108, /*typ=*/3,
                 /*flags=*/0);
    break;
  case 7:
    memcpy(
        (void*)0x20000980,
        "\x03\x00\x00\x00\x00\x00\x00\x00\x67\xe6\x39\xe4\x0a\xb5\xa0\xf7\xc4"
        "\xdf\x13\x98\x64\x9a\x06\x0b\xce\x0d\xb1\x09\x35\x5a\xb6\x07\x5f\x78"
        "\x9c\x79\xe8\x2c\x39\xc7\x15\xe2\x06\x15\x45\xb6\x32\x25\x71\xe2\xe8"
        "\x94\xe2\xb3\x72\x7b\x7a\x36\xca\x31\x45\xfa\xb9\x98\xcf\xbf\x77\x89"
        "\xab\x14\x8f\xc2\x6e\xa6\x51\x21\x9b\x2f\xc2\x5c\x34\xaf\xcb\x3a\x7a"
        "\xe4\x30\x24\x37\xd3\xfc\x09\xee\x8d\x78\x9b\x4d\x03\x61\x05\x60\xdd"
        "\x6c\x38\x67\x01\xa7\x82\xc2\xce\x0d\x7b\xee\xe2\x40\xa9\xef\x27\x78"
        "\x8a\x69\xbe\xe6\xcf\x80\x4f\x49\x00\xa0\xbd\x5b\xbe\x72\xd0\xd9\xd6"
        "\xcb\x1e\x55\x81\x81\xb1\xaa\x06\xe3\x0a\x5b\xf6\x19\xb5\x80\xda\xb7"
        "\x96\x00\xf8\x63\x71\x47\x11\xab\x56\x6e\x03\x58\x00\x00\x06\x0a\xee"
        "\x8d\xd9\xa3\x9a\x94\x92\xce\x6a\x4b\x69\x62\x6d\x89\x94\x4a\x89\xd1"
        "\x16\xff\x68\x0c\xd3\xb7\x2e\x06\xcf\x13\x5a\x99\xf5\xec\x0a\xbe\x6a"
        "\x66\xfd\x7f\x56\xfc\x69\xde\x7e\x92\xca\x20\xae\x63\xc4\x7b\xa9\x60"
        "\xcc\x37\xd0\xde\x48\x58\xff\x75\x09\x31\xc0\xac\xb3\x1a\x83\x4e\x00"
        "\x17\x1b\x00\x85\x57\xa9\x8c\x12\xc3\x00\x84\xb2\xa1\x2d\x0f\x68\x70"
        "\xba\x27\x90\xcc\x00\xeb\x2a\x06\x00\x00\x00\x4a\x37\xea\xd1\x11\xb8"
        "\x1c\xf3\x07\x2d\x80\xa2",
        278);
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t))CAST(msgsnd))(
        /*msqid=*/r[1], /*msgp=*/0x20000980, /*sz=*/0xee, /*flags=*/0);
    break;
  case 8:
    memcpy(
        (void*)0x20000240,
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xee"
        "\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\xe4\xac\xd9\xb1\x50\x29\x94\x57\x9a\x69\xc4"
        "\x61\x91\x67\xf4\x27\xce\x19\x81\xa2\xb7\x79\x55\xc1\xdd\xab\x8f\x10"
        "\xd6\x87\xd0\x89\xe3\x47\x29\xd0\x27\xf2\xe9\xba\xf7\xd4\x11\x06\x5f"
        "\x3f\x6a\xa9\x8b\x4b\x2a\x36\xbc\x81\x09\xb8\xeb\xde\x20\x59\xea\xe5"
        "\x65\xe3\x0b\x1f\x82\x53\xbf\x11\xe4\xfe\xba\xa7\xb9\x59\xab\x15\x3a"
        "\xaa\x00\xe1\x4c\xa0\x5d\xa1\xc8\x01\x00\x39\x2a\x3e\x4e\x1e\xd2\x5d"
        "\x13\xc1\xf2\xed\xf6\xda\x4e\xcb\x0e\x25\xec\x60\x2b\x39\xd2\x0c\xfe"
        "\x7f\x85\x18\x1d\x36\x70\xc7\xff\x81\x59\x59\x9e\x78\x3e\x56\x42\x61"
        "\x1d\x40\x03\xe4\xfe\xec\x73\x1d\xbd\xd0\xe6\x8a\xa0\xea\xb9\x3d\xf7"
        "\xa3\x16\xf3\x06\x44\x19\xf3\x81\xda\x87\x19\x6f\x6d\x0d\x72\x43\x66"
        "\xca\x4f\x5e\xcf\xd5\x9f\xc8\xfe\x41\x9b\x0c\x42\x34\xa0\x8d\x08\x39"
        "\xe3\xf7\x59\x7b\x18\xc4\x18\x1d\x93\x50\x25\x18\xe9\x0c\x68\x39\x2b"
        "\xda\x21\x18\x6e\x18\x25\x77\x51\x37\x9f\x3d\x8c\xa9\x23\xc5\xe0\x68"
        "\x84\xc2\x3d\xff\x49\xed\xec\xbd\xde\x41\xb5\x7c\x8e\x2a\x7a\x7a\xc6"
        "\x54\x91\x0d\xd6\xae\x53\x72\x09\xec\x89\x98\xda\xa4\xf3\x5c\xe1\x6b"
        "\xe9\xc8\x39\xb7\xd4\x5a\xa7\xd8\x6b\x82\xa7\x0f\xc8\x9d\x61\x00\xee"
        "\x6c\xe1\x3a\xc0\x8b\x90\x93\x31\x82\xeb\x6d\x40\xcb\x80\x38\xcf\xb7"
        "\x8f\x7e\xe2\x7d\xf2\x43\x52\x70\xda\xdb\xd0\x19\xa0\x70\x62\xeb\x5c"
        "\xcd",
        426);
    ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t, intptr_t))CAST(
        msgrcv))(/*msqid=*/r[1], /*msgp=*/0x20000240, /*sz=*/0x7d, /*typ=*/0,
                 /*flags=*/0x1000);
    break;
  case 9:
    ((intptr_t(*)())CAST(getgid))();
    break;
  }
}
int main(void)
{
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t, intptr_t,
                intptr_t))CAST(mmap))(/*addr=*/0x20000000, /*len=*/0x1000000,
                                      /*prot=*/3, /*flags=*/0x1012, /*fd=*/-1,
                                      /*offset=*/0);
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}