// https://syzkaller.appspot.com/bug?id=81a8305cd101438de3770cd5fb625389bc9a4df9
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_socket
#define __NR_socket 359
#endif
#ifndef __NR_fcntl
#define __NR_fcntl 55
#endif
#ifndef __NR_ioctl
#define __NR_ioctl 54
#endif
#ifndef __NR_read
#define __NR_read 3
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[3];
void loop()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20001000, 0xffe000, 3, 0x32, -1, 0);
  r[0] = syscall(__NR_socket, 2, 1, 0);
  memcpy((void*)0x2051fff3, "/dev/net/tun", 13);
  r[1] = syz_open_dev(0x2051fff3, 0, 0);
  r[2] = syscall(__NR_fcntl, r[1], 0, r[1]);
  memcpy((void*)0x20a84000,
         "\x67\x72\x65\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         16);
  memcpy((void*)0x20a84010,
         "\xca\x4f\x73\x4f\x7f\x35\x52\x6c\xe9\x0e\x00\x00\xff\xff\xee\x00",
         16);
  syscall(__NR_ioctl, r[2], 0x400454ca, 0x20a84000);
  memcpy((void*)0x2062ffe0,
         "\x67\x72\x65\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         16);
  *(uint16_t*)0x2062fff0 = 0x301;
  syscall(__NR_ioctl, r[0], 0x8914, 0x2062ffe0);
  syscall(__NR_read, r[1], 0x20838000, 0xe);
}

int main()
{
  loop();
  return 0;
}