// https://syzkaller.appspot.com/bug?id=174e7821fdf5c3f30bf8c3f911c2003d08c9feb2
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

static long syz_open_procfs(volatile long a0, volatile long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -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;
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_sendfile
#define __NR_sendfile 187
#endif
#ifndef __NR_socket
#define __NR_socket 359
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x1ffff000, 0x1000, 0, 0x32, -1, 0);
  syscall(__NR_mmap, 0x20000000, 0x1000000, 7, 0x32, -1, 0);
  syscall(__NR_mmap, 0x21000000, 0x1000, 0, 0x32, -1, 0);
  intptr_t res = 0;
  memcpy((void*)0x20000040, "net/ptype\000", 10);
  res = -1;
  res = syz_open_procfs(0, 0x20000040);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10, 0x80803, 0);
  if (res != -1)
    r[1] = res;
  syscall(__NR_sendfile, (intptr_t)r[1], (intptr_t)r[0], 0, 0x9af);
  return 0;
}