// https://syzkaller.appspot.com/bug?id=6625234933e74cf3bcf9bfdd8abfa0160d704cc5
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <errno.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/capability.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <signal.h>
#include <stdarg.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static void exitf(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit(kRetryStatus);
}

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  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)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &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);

#define CLONE_NEWCGROUP 0x02000000

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_NEWCGROUP);
  unshare(CLONE_NEWNET);
  unshare(CLONE_NEWUTS);
  unshare(CLONE_SYSVSEM);
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);

  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    close(fd);
    return false;
  }
  close(fd);
  return true;
}

static int real_uid;
static int real_gid;
__attribute__((aligned(64 << 10))) static char sandbox_stack[1 << 20];

static int namespace_sandbox_proc(void* arg)
{
  sandbox_common();

  write_file("/proc/self/setgroups", "deny");
  if (!write_file("/proc/self/uid_map", "0 %d 1\n", real_uid))
    fail("write of /proc/self/uid_map failed");
  if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid))
    fail("write of /proc/self/gid_map failed");

  if (mkdir("./syz-tmp", 0777))
    fail("mkdir(syz-tmp) failed");
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    fail("mount(tmpfs) failed");
  if (mkdir("./syz-tmp/newroot", 0777))
    fail("mkdir failed");
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    fail("mkdir failed");
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL,
            MS_BIND | MS_REC | MS_PRIVATE, NULL))
    fail("mount(dev) failed");
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    fail("mkdir failed");
  if (mount(NULL, "./syz-tmp/newroot/proc", "proc", 0, NULL))
    fail("mount(proc) failed");
  if (mkdir("./syz-tmp/pivot", 0777))
    fail("mkdir failed");
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      fail("chdir failed");
  } else {
    if (chdir("/"))
      fail("chdir failed");
    if (umount2("./pivot", MNT_DETACH))
      fail("umount failed");
  }
  if (chroot("./newroot"))
    fail("chroot failed");
  if (chdir("/"))
    fail("chdir failed");

  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    fail("capget failed");
  cap_data[0].effective &= ~(1 << CAP_SYS_PTRACE);
  cap_data[0].permitted &= ~(1 << CAP_SYS_PTRACE);
  cap_data[0].inheritable &= ~(1 << CAP_SYS_PTRACE);
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    fail("capset failed");

  loop();
  doexit(1);
}

static int do_sandbox_namespace(int executor_pid, bool enable_tun)
{
  int pid;

  real_uid = getuid();
  real_gid = getgid();
  mprotect(sandbox_stack, 4096, PROT_NONE);
  pid = clone(namespace_sandbox_proc,
              &sandbox_stack[sizeof(sandbox_stack) - 64],
              CLONE_NEWUSER | CLONE_NEWPID, NULL);
  if (pid < 0)
    fail("sandbox clone failed");
  return pid;
}

static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exitf("opendir(%s) failed due to NOFILE, exiting");
    }
    exitf("opendir(%s) failed", dir);
  }
  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))
      exitf("lstat(%s) failed", filename);
    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)
        exitf("unlink(%s) failed", filename);
      if (umount2(filename, MNT_DETACH))
        exitf("umount(%s) failed", filename);
    }
  }
  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))
          exitf("umount(%s) failed", dir);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exitf("rmdir(%s) failed", dir);
  }
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    char cwdbuf[256];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      fail("failed to mkdir");
    int pid = fork();
    if (pid < 0)
      fail("loop fork failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      if (chdir(cwdbuf))
        fail("failed to chdir");
      test();
      doexit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid)
        break;
      usleep(1000);
      if (current_time_ms() - start > 5 * 1000) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
    remove_dir(cwdbuf);
  }
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_socketpair
#define __NR_socketpair 360
#endif
#ifndef __NR_socket
#define __NR_socket 359
#endif
#ifndef __NR_setsockopt
#define __NR_setsockopt 366
#endif
#ifndef __NR_sendto
#define __NR_sendto 369
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[7];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0x3000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    r[1] = syscall(__NR_socketpair, 0x2ul, 0x5ul, 0x84ul, 0x20001ff8ul);
    break;
  case 2:
    r[2] = syscall(__NR_socket, 0x2ul, 0x2ul, 0x0ul);
    break;
  case 3:
    memcpy((void*)0x20000000,
           "\x06\x00\x00\x00\xee\x2c\xc1\xed\xde\x9e\xe7\xb9\x1f\x3a"
           "\xd4\xe6\x90\xb0\x1c\x00\x80\x00\x56\x9c\xa3\x3a\x5c\x00"
           "\x00\x00\x00\x80\x00\x00\x01\x41\x05\x1a\x91\x81\x57\x69"
           "\xd7\x46\x7c\x3b\x19\x43\x96\x5c\xb5\xf7\x75\x22\x8d\xa1"
           "\x08\xfe\xb3\x85\x00\x1e\x0b\x5d\x03\xc3\xa5\xb3",
           68);
    r[4] = syscall(__NR_setsockopt, r[2], 0x0ul, 0x489ul, 0x20000000ul,
                   0x44ul);
    break;
  case 4:
    memcpy(
        (void*)0x20000000,
        "\x1a\x51\xe6\x08\x6a\x20\xb0\x96\x05\x18\xdf\xd9\x9d\xd0\xa4"
        "\xc3\x9b\xb8\x4b\x4b\x31\x5c\x26\xf1\x08\x49\x9e\x1e\xa1\xdc"
        "\x07\xf7\x0d\x3a\x2f\x7a\x90\xd0\xda\x4d\x55\xa8\xd3\x6c\xb7"
        "\xa9\x23\x05\x74\xfd\x35\x42\xfd\x48\x28\xb6\xb9\x98\xb2\x42"
        "\x5a\x15\x09\x53\x03\xde\x1f\xc0\x35\x5d\xf8\xd8\xba\xfc\xc8"
        "\xe2\xa0\x91\x92\x44\xdf\x55\x6e\x64\x8c\xc9\xce\xc1\x30\x4c"
        "\x24\xf3\x36\x5b\x34\xe9\xa8\x1b\x5a\x12\xb0\x52\x49\x40\x77"
        "\x28\x81\x65\x1f\x2c\xdc\x59\x93\xd1\x02\x6d\xf5\xb7\xa7\x9a"
        "\x6e\x18\x0d\x1a\x3e\x6f\x98\xd4\x69\x5d\xd4\xc6\x95\xb5\xf1"
        "\x86\x5b\xd1\xea\xde\x5f\x74\xe0\x02\x33\x51\x85\x08\xe3\x61"
        "\x5e\xe6\x80\xb9\x02\x9e\xe1\xbf\x6e\x23\x6e\x2a\xcd\x5f\xac"
        "\x88\xb2\x2a\x32\x77\x14\xc8\x52\xef\x08\xb5\x18\x88\xe0\x37"
        "\x6a\xd1\x93\x36\xb1\x63\x9c\x37\xb5\xbd\x6f\x40\xa6\xec\xf5"
        "\xd3\xd1\xce\x1e\x80\x86\x43\xa5\x9d\x1c\x97\xc5\x1f\x90\xb9"
        "\x85\x57\x1d\xb0\x52\xa8\x27\xa6\xef\x79\x19\x1f\xc8\x91\xe9"
        "\x07\x4d\x8d\x47\xf0\xa8\x3d\xe8\xa7\x9f\x21\x66\x37\xad\xe3"
        "\x0e\x70\x45\x08\x19\x54\x43\x86\xc3\x33\xac\x4d\xff\xc4\xeb"
        "\xbd\x78\xee\xd4\x9d\x9e\x81\xf5\xd1\x18\x6a\xc2\x65\x06\xbd"
        "\xb8\xab\xed\x17\xf5\x09\x48\xc6\xc5\x98\xd4\x62\x17\x72\xd8"
        "\xa1\x0a\x9b\x60\x9d\x7b\x0a\x5e\xc2\xc7\xf9\xfd\xe0\x32\xe0"
        "\x49\x10\xd0\x49\xb3\xaa\x1d\x32\x5e\x2b\xeb\xcc\x69\x24\x8e"
        "\x80\xc6\x76\x0c\xe9\xd9\x6f\xea\x43\x41\x66\xdf\x34\xd8\xad"
        "\x24\x25\xbb\x99\x49\xde\x37\x8a\x25\x71\xe0\x0d\xef\x0a\xd5"
        "\xc0\xf7\x36\x0d\x01\x18\x99\x41\xa2\x56\x13\x6a\x50\xdc\x8f"
        "\x27\x8b\x81\xef\x7e\xb7\x5f\x10\x39\xe5\x48\x7f\x9b\x72\xe6"
        "\x20\x08\x28\xab\xb7\x4f\x4f\xb0\x26\x6a\x78\x6b\x6b\x53\x8c"
        "\x9b\x87\x7f\xf3\xa4\x3d\xbe\x1b\xb0\x6c\xd5\x0f\x08\xc1\x86"
        "\x85\x7e\x89\x4e\xea\xa6\x0e\xad\xad\xe5\x62\x7d\x8f\x0d\x27"
        "\x5a\xba\x68\x44\x1d\x1a\xa1\x96\xe4\xa9\xb7\x22\x10\xbf\x23"
        "\xa6\xe9\xdd\x9a\xf9\xbd\x9d\xeb\x0e\x72\x4e\x76\xec\x16\x40"
        "\xda\xe3\x30\xd8\xf4\xd1\xec\x29\x6c\x45\xc3\x5f\x4f\x31\xca"
        "\xd7\x46\x1e\x02\xae\x7c\x61\x2c\x67\x23\x87\xf5\x89\xd9\x97"
        "\x0e\xc4\x58\x0f\x2b\xb9\xb7\x9b\xe2\xa1\x88\x00\x81\xb8\x25"
        "\x3c\x08\xc9\x19\x47\x45\x03\x80\xbf\x1c\xc6\x35\x6f\xff\x16"
        "\x30\x86\xd0\xd4\x3c\x5a\xa5\x47\x02\x08\xc2\x21\xd1\xe0\xb0"
        "\x0a\xad\x20\x96\x33\x67\x0b\xb3\xec\x0b\x73\x5a\x2a\x3a\xcc"
        "\x8f\xfa\x69\x35\x73\x99\x28\xfe\xd5\x49\x65\xea\xe3\xb1\x3e"
        "\xd9\xe2\xf9\x6b\xc2\x5b\x9d\xc3\xcd\x78\x59\x14\xd5\x1b\x67"
        "\xf5\x58\x83\x7d\xfb\xa6\xdb\xd3\x65\x90\xf3\x01\xf3\x09\x6b"
        "\xd2\x58\x1a\xa7\x9f\x98\xcb\xf1\x5a\xa2\x0b\x8a\xc1\xab\x97"
        "\xc8\x77\xf5\xd0\x94\xbf\xc4\x63\x2f\x1e\x93\x90\x91\x91\xa4"
        "\xf4\x22\xb4\x99\x95\x06\xb2\xc4\xb4\x52\x8d\xed\x87\x70\x90"
        "\x41\xe5\xd9\xc5\xaa\x22\xcb\x85\xaf\x6c\x4b\x69\x5f\xd8\x50"
        "\x75\xbf\x3c\xc8\xdb\x94\x63\x60\x72\x55\x25\x24\x9f\xba\x68"
        "\xb4\x7c\x43\x54\x1f\x31\x35\xff\x53\xc7\x6f\xb3\x4b\xf5\xcf"
        "\x3e\x1e\x7e\x5d\x38\x86\x17\xcd\x47\x9f\x40\xf1\xc5\xb7\xec"
        "\xf3\x99\xf0\x29\x7c\x98\x91\x41\x0e\xd8\xf2\x19\x93\x60\x3d"
        "\x6b\xd2\xd4\xf8\x33\x1e\x12\x22\x3f\x03\x0b\x3a\x4f\xa8\x0a"
        "\xbe\x19\xae\xcf\x9a\xd8\x73\x62\xea\xfa\x44\xaa\xb4\x5c\x34"
        "\xb8\x8e\x9f\x9e\xdb\xd3\xf4\x34\xd8\x32\x16\x45\x82\xfc\xd5"
        "\x8b\x0d\xe9\x94\xcc\x3b\x71\x8a\x9f\x38\x55\xe4\x40\x6a\xbf"
        "\xf0\xdc\x93\x66\xd6\x29\xc6\xcf\xf8\x2e\xb2\x36\x30\x8e\x87"
        "\x5f\x08\xcb\x48\x0e\xb0\x0b\xa6\x2b\x39\x7e\xb3\x6b\x5f\x58"
        "\x86\x9d\x20\x4b\x53\x0d\x8b\x07\x38\xd9\xd1\x6d\x92\xb6\x00"
        "\xc7\x56\x63\x54\x19\xfa\xee\xf8\xf0\x45\xae\x28\xf1\x8d\x90"
        "\xd2\x2b\x57\xf9\xaa\x8b\x55\xc9\xa8\x2b\x0a\xbe\x21\x96\xfc"
        "\x7d\xbb\x89\x5c\x90\x31\x60\x09\x17\x20\xdc\x7f\xe4\x37\x88"
        "\xb7\x3c\x17\x20\x57\xde\x93\x5c\x10\xb9\xc5\xf8\x41\x8d\x80"
        "\x92\xc3\x02\x8a\xdd\xfc\x8d\x4d\x6b\xb1\x7b\x25\x28\xdb\x57"
        "\x56\x2a\x78\x57\x3a\x27\x71\x36\x10\x4d\x24\x52\xce\x98\x4b"
        "\x49\x37\x8a\x3f\xc5\x0c\xa6\xf4\x32\x9b\xcf\x62\x17\x68\x9b"
        "\xbe\x03\x3b\x42\x29\x60\x56\x5c\x5a\xd9\x6d\x5b\x2e\x94\x0e"
        "\xe2\xfb\xce\x94\xb0\x1b\x01\x44\x57\xf1\x98\x9c\xa6\xa7\x3e"
        "\x71\x67\xb0\x4b\x0e\x89\x33\xf8\x7e\x4d\xda\x48\xb7\xda\x33"
        "\x67\x0d\xff\x5d\xe9\xcc\xb8\xa3\x24\x12\x30\x8c\x8f\x51\x2a"
        "\xcd\x45\x86\xea\x6d\x46\xde\x53\x26\x3a\xce\xf6\x52\x5a\xeb"
        "\x75\x12\x82\x29\x84\x02\x5b\x35\x5f\xf3\x55\x8e\x38\x02\xc5"
        "\x65\xc8\x0a\xc7\x97\x60\x24\x60\x51\x7d\x83\xc3\xd9\x25\xf3"
        "\x2f\xe1\x37\x09\x9c\xf6\xbc\x27\xf6\xd9\xcf\xbc\x52\xf7\x7a"
        "\x25\x13\x77\x13\xec\x53\x89\x7d\x12\xa3\x69\xf1\xec\x50\x22"
        "\x3f\x01\xd6\xd6\xf4\xe1\x89\xe8\x94\x3c\x7e\x1f\x0a\x6a\xdd"
        "\xd8\xa5\x1b\xe6\xec\x51\x16\x2a\x53\xaa\x0a\xe7\x56\x32\x99"
        "\xf9\xd9\x87\xbc\xe0\x3d\xec\x28\xbf\x46\x08\x1c\xff\x66\xc4"
        "\xd3\x2f\x19\xd3\xad\x10\x1e\xe6\x94\x1e\xe3\xf0\x71\x0e\x3e"
        "\xe0\xb3\xc2\xb2\x2b\x89\x72\xc0\xb7\x31\xde\x53\x7a\x82\xc6"
        "\xe7\x3f\x4b\xd8\x0e\xf8\xd1\x62\x8c\xb4\xf3\x43\x21\xd0\xab"
        "\x2d\x98\xf3\xed\xee\x3c\x57\x6c\xf6\xf6\x82\xde\x4a\xa3\x23"
        "\xfe\x24\xbd\x40\x0d\x2a\x95\x14\x09\x6b\xa2\xd2\xa8\xc2\x15"
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        "\xc3\x10\x59\x1e\x85\x15\x28\x83\x37\x1e\x43\x1c\x21\xae\xde"
        "\xf9\x01\xfa\x6d\x4d\xae\x67\x88\xb0\x91\x44\x9d\x23\x3b\x63"
        "\xce\x4e\xde\x09\x9a\x8e\x06\x6b\x9b\xfb\x49\x4d\x35\xb8\x07"
        "\xfa\xd0\xac\x0a\x0f\x9b\xb7\x45\xdc\x1f\x31\xe9\x45\x1e\xcd"
        "\x1b\x44\x7f\xd4\xbe\xa7\xba\x21\x7c\xc1\x4f\x55\x2b\xa1\x5f"
        "\x90\xaa\xcd\x84\xd0\xc0\x89\xf9\x77\x1b\x6b\x1d\x1c\xcc\xcb"
        "\x69\xd6\xe3\xc0\xd5\x07\x63\x94\x7d\x79\xc2\x24\xc4\xe9\xd2"
        "\xaa\x20\x10\x50\x52\x30\x48\x1f\x73\x9c\xb9\xb1\xc6\x74\xe8"
        "\xa8\x20\x3f\x97\x3b\xaa\xa5\x75\xbc\x28\xc5\x84\xb1\x1b\xbc"
        "\x84\x9b\xce\x2c\xac\xe3\xc0\x0d\x5a\x62\xc6\xad\xeb\xb1\xd3"
        "\x1b\xd7\xbc\xd5\x1a\x0e\x79\x39\xa6\x88\x40\x25\x31\xb3\x0c"
        "\x51\xac\x5a\xf7\x12\xae\xa9\x13\xc4\x2d\x0e\x55\x5c\xab\xf1"
        "\xe7\x0d\x81\xd6\x0e\x19\x3f\xa8\x6b\xf7\xf6\xea\xa0\xf4\x30"
        "\x12\x02\xb3\xff\x14\xbf\x8f\xf3\xff\xe3\x6d\x2c\x37\x9b\xa0"
        "\x26\xf6\xa6\xcc\xe7\x71\x5e\x33\x26\x1b\x4e\x91\xa7\x3e\x0d"
        "\xba\xef\x72\x76\x78\x31\x5d\x06\x34\x8c\xc3\xe0\xdf\x48\x3f"
        "\xcf\x4c\xfc\x9e\x3f\xdb\x2b\xf7\x68\x56\x48\xf6\xc1\x28\xb4"
        "\x70\xbd\x7f\x60\xe6\x06\xe9\x07\x6f\x38\x35\xe5\x24\x79\x2c"
        "\x31\x93\x07\x9b\x3e\x1c\x3e\x30\x71\x06\x5e\x77\xa4\xb5\x85"
        "\xa4\x1e\x43\xa6\x6b\x1c\x31\x79\x08\xd8\xb3\x5a\x2c\x29\xa4"
        "\xe3\xd1\x64\xa6\x80\x5a\x11\xa1\x8e\x68\xe3\xad\xbf\x59\x96"
        "\x40\x83\x55\x97\x2c\xca\x8a\xee\x9a\x0d\xb1\x08\x50\xe6\x85"
        "\x66\x6d\xd6\x2d\x12\xfc\x51\xe6\xd2\x95\x3b\x76\xef\x8d\xd9"
        "\x32\x3b\xb5\x76\x7d\x25\x01\x22\x76\xd3\x8e\x47\x6c\xa1\x99"
        "\xa5\xa5\xc4\x0f\x00\x54\x17\xe5\x90\x2c\x8f\xf7\xd2\x8e\x48"
        "\x2b\xe1\x52\xca\x9a\x40\xe8\xdd\x7f\xd6\x84\xae\xd5\xa0\xfe"
        "\xe0\x0a\xf4\xa5\xf1\xef\x98\xd7\xa4\xbc\xb9\x5c\x66\x65\x54"
        "\xf0\x99\xb7\x7b\xdf\xfe\xf4\x06\x2f\xf2\xc2\xde\x13\x79\x5c"
        "\x8c\x44\x3b\xb2\x54\xbd\xd5\x49\xe8\x49\xbc\x96\x08\x79\x27"
        "\xc2\x28\xd6\xe7\x5b\xf8\xff\x0d\x10\xf9\x51\x72\x48\xf8\xad"
        "\x8e\x6f\xa5\xa1\xf9\x17\x5a\x4d\xcf\xcb\x01\xf0\xa2\xb9\x80"
        "\x46\x24\x08\xeb\xea\xb8\xc5\x0b\x2c\x5f\xdd\xf2\x49\x34\xbd"
        "\x01\x39\x4d\x22\xd5\xa0\x50\xb4\x12\x59\xab\xcd\x7f\x02\xc4"
        "\x48\x4e\x0d\x6d\x75\xb4\x37\x5f\xa4\xc9\x92\x69\x08\x49\xd7"
        "\xa1\x72\x1a\x53\x7c\xd6\x84\x80\xae\xde\x0e\xf4\xe5\xe0\xc8"
        "\x41\x9c\xe3\x14\x2f\x65\x25\xe4\xc7\x73\x40\xef\x4d\x47\xe3"
        "\x0c\x06\x14\xb0\xec\x64\xe3\x51\x31\xad\xea\x2c\x90\x8c\x10"
        "\xbc\xa2\x59\x95\xa9\x2e\x92\xf7\x47\x71\xd8\x63\xea\xad\x98"
        "\x8e\x6a\xde\x75\xf5\x5c\xb0\xe1\x3f\xe9\x78\x7a\x57\xd9\xea"
        "\x68\xc9\x7b\x0b\xe5\x76\x71\xe7\x09\xa5\xf3\x06\x73\x32\x0c"
        "\x9a\xaa\xa1\xb6\x47\x83\x0d\xd5\x0d\xaa\x04\x58\xab\x64\xf9"
        "\x27\xac\x1c\x4e\x5c\x63\x55\x76\x27\xfc\x90\xc4\x82\xf5\xd0"
        "\x1d\x32\xde\x42\xc9\x00\x72\xcf\xa2\xf5\xee\x2b\xbb\x96\x62"
        "\x6d\x89\x92\x79\x16\x0a\xd2\x95\x10\x95\xe8\x8e\x72\x3b\xf3"
        "\xb1",
        4096);
    r[6] = syscall(__NR_sendto, r[2], 0x20000000ul, 0x1000ul, 0x4ul,
                   0x20000000ul, 0x0ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[10];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 5; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  use_temporary_dir();
  int pid = do_sandbox_namespace(0, false);
  int status = 0;
  while (waitpid(pid, &status, __WALL) != pid) {
  }
  return 0;
}