// https://syzkaller.appspot.com/bug?id=a5b80da4b4e7ebf2467ad2c3c4eb83d86f7163e9
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.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>

__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>

static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t a1)
{

  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == (uintptr_t)-1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0,
             (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

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);
}

#ifndef __NR_preadv
#define __NR_preadv 333
#endif
#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_timer_create
#define __NR_timer_create 259
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[19];
void loop()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  *(uint32_t*)0x20a06fa0 = (uint32_t)0x0;
  *(uint32_t*)0x20a06fa4 = (uint32_t)0x1c;
  *(uint32_t*)0x20a06fa8 = (uint32_t)0x100000;
  *(uint32_t*)0x20a06fac = (uint32_t)0x0;
  *(uint64_t*)0x20a06fb8 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fc0 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fc8 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fd0 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fd8 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fe0 = (uint64_t)0x0;
  *(uint64_t*)0x20a06fe8 = (uint64_t)0x0;
  *(uint64_t*)0x20a06ff0 = (uint64_t)0x0;
  r[13] = syscall(__NR_timer_create, 0x7ul, 0x20a06fa0ul, 0x20dd2ffcul);
  memcpy((void*)0x20337ff2, "\x74\x69\x6d\x65\x72\x73\x00", 7);
  r[15] = syz_open_procfs(0x0ul, 0x20337ff2ul);
  *(uint32_t*)0x205e2ff0 = (uint32_t)0x20fa6000;
  *(uint32_t*)0x205e2ff4 = (uint32_t)0x64;
  r[18] = syscall(__NR_preadv, r[15], 0x205e2ff0ul, 0x1ul, 0x0ul);
}

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