// https://syzkaller.appspot.com/bug?id=8aae379cf9a320aa0d7b7d94a5332c886867c623
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <util.h>

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 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 remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  dp = opendir(dir);
  if (dp == NULL)
    exit(1);
  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);
  if (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;
  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

static uintptr_t syz_open_pts(void)
{
  int master, slave;
  if (openpty(&master, &slave, NULL, NULL, NULL) == -1)
    return -1;
  if (dup2(master, master + 100) != -1)
    close(master);
  return slave;
}

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 < 87; 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, 45);
      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;
  for (iter = 0;; 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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[10] = {0xffffffffffffffff,
                  0xffffffffffffffff,
                  0x0,
                  0x0,
                  0x0,
                  0x0,
                  0xffffffffffffffff,
                  0xffffffffffffffff,
                  0xffffffffffffffff,
                  0x0};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000080, "./bus\000", 6);
    syscall(SYS_mknod, 0x20000080, 0x3a0914c44f7b202c, 0x501);
    break;
  case 1:
    memcpy((void*)0x20000040, "./bus\000", 6);
    syscall(SYS_openat, 0xffffff9c, 0x20000040, 0, 0);
    break;
  case 2:
    memcpy((void*)0x20000000, "./bus\000", 6);
    syscall(SYS_unlink, 0x20000000);
    break;
  case 3:
    syscall(SYS_mknod, 0, 0x3a0914c44f7b202c, 0x501);
    break;
  case 4:
    syscall(SYS_ioctl, -1, 0x80104267, 0);
    break;
  case 5:
    syscall(SYS_openat, 0xffffffffffffff9c, 0, 0, 0);
    break;
  case 6:
    syz_open_pts();
    break;
  case 7:
    syscall(SYS_write, -1, 0, 0);
    break;
  case 8:
    res = syz_open_pts();
    if (res != -1)
      r[0] = res;
    break;
  case 9:
    syscall(SYS_close, r[0]);
    break;
  case 10:
    syscall(SYS_ioctl, -1, 0x802c7414, 0);
    break;
  case 11:
    syscall(SYS_write, r[0], 0, 0);
    break;
  case 12:
    syscall(SYS_readv, -1, 0, 0);
    break;
  case 13:
    syscall(SYS_write, -1, 0, 0);
    break;
  case 14:
    syscall(SYS_mknod, 0, 0x2000, 0x1000);
    break;
  case 15:
    res = syscall(SYS_socket, 0x18, 2, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 16:
    syscall(SYS_getsockopt, r[1], 0x29, 0x2b, 0, 0);
    break;
  case 17:
    syscall(SYS_socketpair, 1, 2, 0, 0);
    break;
  case 18:
    syscall(SYS_mprotect, 0x20000000, 0x3000, 0);
    break;
  case 19:
    syscall(SYS_open, 0, 0, 0);
    break;
  case 20:
    syscall(SYS_clock_settime, 2, 0);
    break;
  case 21:
    syscall(SYS_getpgid, 0);
    break;
  case 22:
    syscall(SYS_setitimer, 0, -1, 0);
    break;
  case 23:
    syscall(SYS_ioctl, -1, 0x802c7415, 0);
    break;
  case 24:
    syscall(SYS_mknod, 0, 0x80002005, 0x4300);
    break;
  case 25:
    syscall(SYS_open, 0, 0x381, 0);
    break;
  case 26:
    syscall(SYS_ioctl, -1, 0x80047410, 0);
    break;
  case 27:
    syscall(SYS_kevent, -1, 0, 0, 0, 0, 0);
    break;
  case 28:
    syscall(SYS_kevent, -1, 0, 0x66, 0, 0, 0);
    break;
  case 29:
    syscall(SYS_read, -1, 0, 0);
    break;
  case 30:
    syz_open_pts();
    break;
  case 31:
    break;
  case 32:
    syscall(SYS_ioctl, -1, 0x802c7414, 0);
    break;
  case 33:
    syscall(SYS_getsockopt, 0xffffff9c, 0xffff, 0x1022, 0, 0);
    break;
  case 34:
    syscall(SYS_open, 0, 0, 0);
    break;
  case 35:
    syscall(SYS_select, 0, 0, 0, 0, 0);
    break;
  case 36:
    syscall(SYS_open, 0, 0x60e, 0);
    break;
  case 37:
    syz_open_pts();
    break;
  case 38:
    memcpy((void*)0x20000040, "./file0\000", 8);
    syscall(SYS_open, 0x20000040, 0x611, 0);
    break;
  case 39:
    syscall(SYS_utimes, 0, -1);
    break;
  case 40:
    syscall(SYS_dup, -1);
    break;
  case 41:
    syscall(SYS_readv, -1, 0, 0);
    break;
  case 42:
    syscall(SYS_ioctl, -1, 0x802c7416, 0);
    break;
  case 43:
    *(uint32_t*)0x20000000 = 4;
    *(uint32_t*)0x20000004 = 2;
    syscall(SYS_ioctl, -1, 0x80085754, 0x20000000);
    break;
  case 44:
    *(uint32_t*)0x20000080 = 3;
    *(uint64_t*)0x20000088 = 0x20000000;
    *(uint16_t*)0x20000000 = 0x20;
    *(uint8_t*)0x20000002 = 0;
    *(uint8_t*)0x20000003 = 0;
    *(uint32_t*)0x20000004 = 0;
    *(uint16_t*)0x20000008 = 0;
    *(uint8_t*)0x2000000a = 0;
    *(uint8_t*)0x2000000b = 0;
    *(uint32_t*)0x2000000c = 0;
    *(uint16_t*)0x20000010 = 6;
    *(uint8_t*)0x20000012 = 0;
    *(uint8_t*)0x20000013 = 0;
    *(uint32_t*)0x20000014 = 0;
    syscall(SYS_ioctl, -1, 0x80104267, 0x20000080);
    break;
  case 45:
    *(uint32_t*)0x20000040 = 1;
    *(uint32_t*)0x20000044 = 0;
    syscall(SYS_ioctl, -1, 0x80085762, 0x20000040);
    break;
  case 46:
    syscall(SYS_minherit, 0x2069c000, 0x2000, 2);
    break;
  case 47:
    syscall(SYS_dup, -1);
    break;
  case 48:
    syscall(SYS_socket, 0x18, 1, 0);
    break;
  case 49:
    syscall(SYS_ioctl, -1, 0x802c7416, 0);
    break;
  case 50:
    syscall(SYS_minherit, 0x2069c000, 0x2000, 2);
    break;
  case 51:
    syscall(SYS_flock, -1, 0);
    break;
  case 52:
    syscall(SYS_mprotect, 0x20000000, 0x800000, 5);
    break;
  case 53:
    syscall(SYS_ioctl, -1, 0x80104267, 0);
    break;
  case 54:
    syscall(SYS_clock_gettime, 0, 0);
    break;
  case 55:
    res = syscall(SYS_getuid);
    if (res != -1)
      r[2] = res;
    break;
  case 56:
    syscall(SYS_setuid, r[2]);
    break;
  case 57:
    syscall(SYS_getgid);
    break;
  case 58:
    syscall(SYS_setsockopt, -1, 3, 0xa, 0, 0x37488252adb8a56b);
    break;
  case 59:
    res = syscall(SYS_semget, 0, 6, 0x8c);
    if (res != -1)
      r[3] = res;
    break;
  case 60:
    syscall(SYS_socket, 0x18, 2, 0);
    break;
  case 61:
    res = syscall(SYS_shmget, 0x798dd814 + procid * 4, 0x3000, 0, 0x20ffb000);
    if (res != -1)
      r[4] = res;
    break;
  case 62:
    syscall(SYS_shmctl, r[4], 2, 0x20000500);
    break;
  case 63:
    syscall(SYS_shmget, 0, 0x2000, 0x20, 0x20ffd000);
    break;
  case 64:
    *(uint16_t*)0x200003c0 = 3;
    *(uint16_t*)0x200003c2 = 0;
    *(uint16_t*)0x200003c4 = 0x1000;
    *(uint16_t*)0x200003c6 = 3;
    *(uint16_t*)0x200003c8 = 0x8001;
    *(uint16_t*)0x200003ca = 0;
    *(uint16_t*)0x200003cc = 0;
    *(uint16_t*)0x200003ce = 0x4ca;
    *(uint16_t*)0x200003d0 = 0x1000;
    *(uint16_t*)0x200003d2 = 0;
    *(uint16_t*)0x200003d4 = 2;
    *(uint16_t*)0x200003d6 = 0x1000;
    *(uint16_t*)0x200003d8 = 7;
    *(uint16_t*)0x200003da = 6;
    *(uint16_t*)0x200003dc = 0x1000;
    *(uint16_t*)0x200003de = 0;
    *(uint16_t*)0x200003e0 = 1;
    *(uint16_t*)0x200003e2 = 0x800;
    *(uint16_t*)0x200003e4 = 4;
    *(uint16_t*)0x200003e6 = 2;
    *(uint16_t*)0x200003e8 = 0x1000;
    syscall(SYS_semop, r[3], 0x200003c0, 7);
    break;
  case 65:
    syscall(SYS_clock_gettime, 0, 0);
    break;
  case 66:
    res = syscall(SYS_getgid);
    if (res != -1)
      r[5] = res;
    break;
  case 67:
    syscall(SYS_fchown, -1, 0, r[5]);
    break;
  case 68:
    res = syscall(SYS_openat, 0xffffffffffffff9c, 0, 0x4000002, 0);
    if (res != -1)
      r[6] = res;
    break;
  case 69:
    memcpy(
        (void*)0x200018c0,
        "\xb1\xce\x74\x44\xd8\xb6\xd1\xd6\xa8\x42\xca\xdb\x90\xf0\xff\xe2\xbf"
        "\xfc\xb3\xfc\x16\xf2\x4f\xe6\xe4\xb4\xaf\x01\x4d\xd6\x3f\x1f\xba\xc6"
        "\xc9\x1a\x88\xbf\xae\x81\xf0\x31\xf7\x07\xe8\x42\x7f\xf0\x29\xb7\x5a"
        "\xe1\x67\xe9\x36\x00\x64\xde\x2e\x3e\x9d\xea\xd9\xb2\xd6\x43\xf6\xda"
        "\xe9\x40\x36\xd0\xad\x86\x80\x12\x04\x9d\x83\x5a\xbe\x80\xe4\xb1\x7f"
        "\xea\x7a\xcb\x81\x61\xac\xf7\xd1\x8e\x4f\x47\xf0\x1e\x25\xbb\x23\xdc"
        "\x14\x17\x07\x4c\x92\xd2\x1e\xbb\xc2\x1b\x27\x04\x44\x5a\x7a\xa0\x01"
        "\x83\xea\xba\x76\x85\xd2\xf6\x04\xb8\xac\x31\xd5\xb1\x1c\x11\x71\xdb"
        "\x51\xb9\xa1\x72\x15\xfc\xcf\x2c\x26\x59\x52\x54\x15\x92\x44\x3b\xab"
        "\x67\xfc\xfc\x1e\xc6\x5d\x50\xd4\xee\x3a\xfc\xc0\x6a\x9d\x37\xff\x46"
        "\xbd\x5e\x00\xe2\xb3\x89\x94\xc4\x9a\x0b\xda\x7f\x59\xfb\x82\x87\xf4"
        "\x57\x06\xe9\x51\xed\x2d\x47\x57\xfd\x86\x2e\xe4\x73\xda\x42\xcb\xea"
        "\x8e\x77\x5e\xf6\xca\x29\xe6\x0e\xf7\xf5\x8d\x85\xb9\xe4\x11\x4b\xed"
        "\xe1\x64\x87\xfe\x74\xff\xad\x24\x5d\x23\x27\x86\xcf\x1f\xd0\x35\x74"
        "\x52\xb0\x19\x5f\xf7\x08\x93\xf5\xa2\xaf\xa0\x6e\x05\x16\x5a\x79\x1b"
        "\x0c\x97\x29\x4e\x80\x27\xfe\x1b\xdd\xde\xc7\x9f\x3f\x37\x8f\x6e\xa5"
        "\xd9\x04\xf7\xea\x3f\x82\x73\x7e\x7c\x71\xb6\xed\x9d\xee\x9e\xca\x0a"
        "\x8d\x49\x0c\xb3\xff\x37\xc0\xbb\xa0\xe8\xa7\x77\xef\xa7\xec\x79\x69"
        "\xcd\xef\x6f\x89\x22\x1c\x51\x0c\x8e\x29\xe6\x70\x5c\x86\x28\xa6\x07"
        "\x33\xd2\x6b\x9c\xf8\x28\xea\xd7",
        331);
    syscall(SYS_setsockopt, -1, 0, 0x1000400000000008, 0x200018c0, 0x14b);
    break;
  case 70:
    syscall(SYS_write, -1, 0x200002c0, 0);
    break;
  case 71:
    syscall(SYS_sendmsg, r[6], 0, 0x400);
    break;
  case 72:
    syscall(SYS_fchown, -1, 0, 0);
    break;
  case 73:
    memcpy((void*)0x20000000, "/dev/null\000", 10);
    res = syscall(SYS_openat, 0xffffffffffffff9c, 0x20000000, 0x4000002, 0);
    if (res != -1)
      r[7] = res;
    break;
  case 74:
    syscall(SYS_ioctl, r[7], 0x2000746e, 0);
    break;
  case 75:
    syscall(SYS_semget, 0, 6, 0x8c);
    break;
  case 76:
    syscall(SYS_getsockopt, -1, 0x29, 0x2a, 0, 0);
    break;
  case 77:
    syscall(SYS_shmctl, 0, 2, 0x20000500);
    break;
  case 78:
    syscall(SYS_clock_gettime, 0, 0);
    break;
  case 79:
    syscall(SYS_fcntl, -1, 1, 0);
    break;
  case 80:
    memcpy((void*)0x20000000, "/dev/null\000", 10);
    res = syscall(SYS_openat, 0xffffffffffffff9c, 0x20000000, 0x4000002, 0);
    if (res != -1)
      r[8] = res;
    break;
  case 81:
    syscall(SYS_setsockopt, -1, 3, 0xa, 0, 0x37488252adb8a56b);
    break;
  case 82:
    syscall(SYS_ioctl, r[8], 0x2000746e, 0);
    break;
  case 83:
    res = syscall(SYS_semget, 0, 6, 0x8c);
    if (res != -1)
      r[9] = res;
    break;
  case 84:
    syscall(SYS_getsockopt, -1, 0x29, 0x2a, 0, 0);
    break;
  case 85:
    syscall(SYS_semop, r[9], 0, 0);
    break;
  case 86:
    syscall(SYS_getgid);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000, 0x1000000, 3, 0x1012, -1, 0, 0);
  for (procid = 0; procid < 2; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}