// https://syzkaller.appspot.com/bug?id=94c30c9bde8a1b8b6b582ab2c954507bfd9fa7eb
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

uint64_t current_time_ms()
{
  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()
{
  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;
  int iter = 0;
retry:
  while (umount2(dir, MNT_DETACH) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    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);
    while (umount2(filename, MNT_DETACH) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, MNT_DETACH))
        exit(1);
    }
  }
  closedir(dp);
  int i;
  for (i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, MNT_DETACH))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one();

#define WAIT_FLAGS __WALL

static void loop()
{
  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) {
      setup_test();
      if (chdir(cwdbuf))
        exit(1);
      execute_one();
      reset_test();
      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(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, WAIT_FLAGS) != pid) {
      }
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff};

void execute_one()
{
  long res = 0;
  res = syscall(__NR_socket, 0xf, 3, 2);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x205f5000 = 0xffffff80;
  *(uint32_t*)0x205f5008 = 0;
  *(uint64_t*)0x205f5010 = 0x208feff0;
  *(uint64_t*)0x208feff0 = 0x2080e000;
  *(uint8_t*)0x2080e000 = 2;
  *(uint8_t*)0x2080e001 = 0xe;
  *(uint8_t*)0x2080e002 = 0;
  *(uint8_t*)0x2080e003 = 0;
  *(uint16_t*)0x2080e004 = 0x14;
  *(uint16_t*)0x2080e006 = 0;
  *(uint32_t*)0x2080e008 = 0;
  *(uint32_t*)0x2080e00c = 0;
  *(uint16_t*)0x2080e010 = 5;
  *(uint16_t*)0x2080e012 = 6;
  *(uint8_t*)0x2080e014 = 0;
  *(uint8_t*)0x2080e015 = 0;
  *(uint16_t*)0x2080e016 = 0;
  *(uint16_t*)0x2080e018 = 0xa;
  *(uint16_t*)0x2080e01a = htobe16(0);
  *(uint32_t*)0x2080e01c = 0;
  *(uint8_t*)0x2080e020 = 0;
  *(uint8_t*)0x2080e021 = 0;
  *(uint8_t*)0x2080e022 = 0;
  *(uint8_t*)0x2080e023 = 0;
  *(uint8_t*)0x2080e024 = 0;
  *(uint8_t*)0x2080e025 = 0;
  *(uint8_t*)0x2080e026 = 0;
  *(uint8_t*)0x2080e027 = 0;
  *(uint8_t*)0x2080e028 = 0;
  *(uint8_t*)0x2080e029 = 0;
  *(uint8_t*)0x2080e02a = 0;
  *(uint8_t*)0x2080e02b = 0;
  *(uint8_t*)0x2080e02c = 0;
  *(uint8_t*)0x2080e02d = 0;
  *(uint8_t*)0x2080e02e = 0;
  *(uint8_t*)0x2080e02f = 0;
  *(uint32_t*)0x2080e030 = 0;
  *(uint16_t*)0x2080e038 = 8;
  *(uint16_t*)0x2080e03a = 0x12;
  *(uint16_t*)0x2080e03c = 0;
  *(uint8_t*)0x2080e03e = 2;
  *(uint8_t*)0x2080e03f = 0;
  *(uint32_t*)0x2080e040 = 0;
  *(uint32_t*)0x2080e044 = 0;
  *(uint16_t*)0x2080e048 = 0x1f;
  *(uint16_t*)0x2080e04a = 0;
  *(uint8_t*)0x2080e04c = 0;
  *(uint8_t*)0x2080e04d = 0;
  *(uint16_t*)0x2080e04e = 0;
  *(uint32_t*)0x2080e050 = 0;
  *(uint32_t*)0x2080e054 = 0;
  *(uint8_t*)0x2080e058 = 0xac;
  *(uint8_t*)0x2080e059 = 0x14;
  *(uint8_t*)0x2080e05a = -1;
  *(uint8_t*)0x2080e05b = 0xbb;
  *(uint8_t*)0x2080e068 = 0xac;
  *(uint8_t*)0x2080e069 = 0x14;
  *(uint8_t*)0x2080e06a = 0x14;
  *(uint8_t*)0x2080e06b = 0;
  *(uint16_t*)0x2080e078 = 5;
  *(uint16_t*)0x2080e07a = 5;
  *(uint8_t*)0x2080e07c = 0;
  *(uint8_t*)0x2080e07d = 0;
  *(uint16_t*)0x2080e07e = 0;
  *(uint16_t*)0x2080e080 = 0xa;
  *(uint16_t*)0x2080e082 = htobe16(0);
  *(uint32_t*)0x2080e084 = 0;
  *(uint8_t*)0x2080e088 = 0xfe;
  *(uint8_t*)0x2080e089 = 0x80;
  *(uint8_t*)0x2080e08a = 0;
  *(uint8_t*)0x2080e08b = 0;
  *(uint8_t*)0x2080e08c = 0;
  *(uint8_t*)0x2080e08d = 0;
  *(uint8_t*)0x2080e08e = 0;
  *(uint8_t*)0x2080e08f = 0;
  *(uint8_t*)0x2080e090 = 0;
  *(uint8_t*)0x2080e091 = 0;
  *(uint8_t*)0x2080e092 = 0;
  *(uint8_t*)0x2080e093 = 0;
  *(uint8_t*)0x2080e094 = 0;
  *(uint8_t*)0x2080e095 = 0;
  *(uint8_t*)0x2080e096 = 0;
  *(uint8_t*)0x2080e097 = -1;
  *(uint32_t*)0x2080e098 = 0;
  *(uint64_t*)0x208feff8 = 0xa0;
  *(uint64_t*)0x205f5018 = 1;
  *(uint64_t*)0x205f5020 = 0;
  *(uint64_t*)0x205f5028 = 0;
  *(uint32_t*)0x205f5030 = 0;
  syscall(__NR_sendmsg, r[0], 0x205f5000, 0);
  res = syscall(__NR_inotify_init1, 0);
  if (res != -1)
    r[1] = res;
  syscall(__NR_fcntl, r[1], 8, -1);
  res = syscall(__NR_fcntl, r[1], 0x10, 0x2045fff8);
  if (res != -1)
    r[2] = *(uint32_t*)0x2045fffc;
  syscall(__NR_ptrace, 0x4206, r[2], 0, 0);
  syscall(__NR_ptrace, 0x4207, r[2]);
  syscall(__NR_ptrace, 9, r[2], 0, 0);
  res = syscall(__NR_socket, 0xa, 2, 0x88);
  if (res != -1)
    r[3] = res;
  *(uint16_t*)0x20000100 = 0xa;
  *(uint16_t*)0x20000102 = htobe16(0);
  *(uint32_t*)0x20000104 = 0;
  *(uint8_t*)0x20000108 = 0xfe;
  *(uint8_t*)0x20000109 = 0x80;
  *(uint8_t*)0x2000010a = 0;
  *(uint8_t*)0x2000010b = 0;
  *(uint8_t*)0x2000010c = 0;
  *(uint8_t*)0x2000010d = 0;
  *(uint8_t*)0x2000010e = 0;
  *(uint8_t*)0x2000010f = 0;
  *(uint8_t*)0x20000110 = 0;
  *(uint8_t*)0x20000111 = 0;
  *(uint8_t*)0x20000112 = 0;
  *(uint8_t*)0x20000113 = 0;
  *(uint8_t*)0x20000114 = 0;
  *(uint8_t*)0x20000115 = 0;
  *(uint8_t*)0x20000116 = 0;
  *(uint8_t*)0x20000117 = 0;
  *(uint32_t*)0x20000118 = 4;
  syscall(__NR_connect, r[3], 0x20000100, 0x1c);
}
int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}