// https://syzkaller.appspot.com/bug?id=632e462853f2cf2644dea8c3f5ce98185f33da66
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <errno.h>
#include <errno.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/prctl.h>
#include <sys/prctl.h>
#include <sys/resource.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 <stdint.h>
#include <string.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 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 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);

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_IO);
}

static int do_sandbox_none(int executor_pid, bool enable_tun)
{
  int pid = fork();
  if (pid)
    return pid;

  sandbox_common();

  loop();
  doexit(1);
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      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;
      }
    }
  }
}

long r[30];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0x218000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    r[1] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul);
    break;
  case 2:
    *(uint16_t*)0x20000000 = (uint16_t)0x26;
    memcpy((void*)0x20000002,
           "\x73\x6b\x63\x69\x70\x68\x65\x72\x00\x00\x00\x00\x00\x00",
           14);
    *(uint32_t*)0x20000010 = (uint32_t)0x0;
    *(uint32_t*)0x20000014 = (uint32_t)0x0;
    memcpy((void*)0x20000018,
           "\x63\x68\x61\x63\x68\x61\x32\x30\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",
           64);
    r[7] = syscall(__NR_bind, r[1], 0x20000000ul, 0x58ul);
    break;
  case 3:
    r[8] = syscall(__NR_accept, r[1], 0x0ul, 0x0ul);
    break;
  case 4:
    memcpy((void*)0x2007ff6f, "\x9f\xa0\x29\x1e\x41\x79\x7c\x3d\x71\x85"
                              "\x4a\x9f\xe2\xcd\x85\x86\x74\xc8\x29\x88"
                              "\x34\x8b\x5c\xa3\xa6\x10\x3d\x5c\xa1\xcb"
                              "\x9e\xef",
           32);
    r[10] = syscall(__NR_setsockopt, r[1], 0x117ul, 0x1ul, 0x2007ff6ful,
                    0x20ul);
    break;
  case 5:
    r[11] = syscall(__NR_close, 0xfffffffffffffffful);
    break;
  case 6:
    *(uint64_t*)0x2008dfc8 = (uint64_t)0x200eafe4;
    *(uint32_t*)0x2008dfd0 = (uint32_t)0x1c;
    *(uint64_t*)0x2008dfd8 = (uint64_t)0x20216000;
    *(uint64_t*)0x2008dfe0 = (uint64_t)0x5;
    *(uint64_t*)0x2008dfe8 = (uint64_t)0x20216000;
    *(uint64_t*)0x2008dff0 = (uint64_t)0x0;
    *(uint32_t*)0x2008dff8 = (uint32_t)0x3;
    *(uint64_t*)0x20216000 = (uint64_t)0x20216000;
    *(uint64_t*)0x20216008 = (uint64_t)0x0;
    *(uint64_t*)0x20216010 = (uint64_t)0x20216000;
    *(uint64_t*)0x20216018 = (uint64_t)0x0;
    *(uint64_t*)0x20216020 = (uint64_t)0x20123f7b;
    *(uint64_t*)0x20216028 = (uint64_t)0x0;
    *(uint64_t*)0x20216030 = (uint64_t)0x20176000;
    *(uint64_t*)0x20216038 = (uint64_t)0x0;
    *(uint64_t*)0x20216040 = (uint64_t)0x20216f27;
    *(uint64_t*)0x20216048 = (uint64_t)0xd9;
    r[29] = syscall(__NR_recvmsg, r[8], 0x2008dfc8ul, 0x40010101ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[14];

  memset(r, -1, sizeof(r));
  srand(getpid());
  for (i = 0; i < 7; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  for (i = 0; i < 7; i++) {
    pthread_create(&th[7 + i], 0, thr, (void*)i);
    if (rand() % 2)
      usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      int pid = do_sandbox_none(i, false);
      int status = 0;
      while (waitpid(pid, &status, __WALL) != pid) {
      }
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}