// https://syzkaller.appspot.com/bug?id=bff61d87129afb198021fa0a2d4d09706a14ada8
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>

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

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

__attribute__((noreturn)) static void fail(const char* msg, ...)
{
  int e = errno;
  fflush(stdout);
  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 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);

  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()
{
  while (1) {
    test();
  }
}

long r[26];
void test()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  memcpy((void*)0x20598e10, "\x2f\x64\x65\x76\x2f\x6b\x76\x6d\x00", 9);
  r[2] = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20598e10ul, 0x0ul,
                 0x0ul);
  r[3] = syscall(__NR_ioctl, r[2], 0xae01ul, 0x0ul);
  *(uint64_t*)0x20067fe0 = (uint64_t)0x20;
  *(uint64_t*)0x20067fe8 = (uint64_t)0x7;
  *(uint64_t*)0x20067ff0 = (uint64_t)0x1;
  *(uint64_t*)0x20067ff8 = (uint64_t)0xfffffffffffeffff;
  r[8] = syscall(__NR_rt_sigaction, 0x11ul, 0x20067fe0ul, 0x205cefe0ul,
                 0x8ul, 0x20ade000ul);
  *(uint32_t*)0x20afa000 = (uint32_t)0xd2;
  *(uint32_t*)0x20afa004 = (uint32_t)0x0;
  *(uint32_t*)0x20afa008 = (uint32_t)0x0;
  *(uint32_t*)0x20afa00c = (uint32_t)0x0;
  *(uint32_t*)0x20afa010 = (uint32_t)0x0;
  *(uint32_t*)0x20afa014 = (uint32_t)0x0;
  *(uint32_t*)0x20afa018 = (uint32_t)0x0;
  *(uint32_t*)0x20afa01c = (uint32_t)0x0;
  *(uint32_t*)0x20afa020 = (uint32_t)0x0;
  *(uint32_t*)0x20afa024 = (uint32_t)0x0;
  *(uint32_t*)0x20afa028 = (uint32_t)0x0;
  *(uint32_t*)0x20afa02c = (uint32_t)0x0;
  *(uint32_t*)0x20afa030 = (uint32_t)0x0;
  *(uint32_t*)0x20afa034 = (uint32_t)0x0;
  *(uint32_t*)0x20afa038 = (uint32_t)0x0;
  *(uint32_t*)0x20afa03c = (uint32_t)0x0;
  r[25] = syscall(__NR_ioctl, r[3], 0x4040ae77ul, 0x20afa000ul);
}

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