// https://syzkaller.appspot.com/bug?id=2a8ea4797595393d3e237d9e8d49ead18997953a
// 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_accept4
#define __NR_accept4 364
#endif
#ifndef __NR_bind
#define __NR_bind 361
#endif
#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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 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;
  res = syscall(__NR_socket, 0x26, 5, 0);
  if (res != -1)
    r[0] = res;
  *(uint16_t*)0x20001840 = 0x26;
  memcpy((void*)0x20001842, "hash\000\000\000\000\000\000\000\000\000\000", 14);
  *(uint32_t*)0x20001850 = 0;
  *(uint32_t*)0x20001854 = 0;
  memcpy((void*)0x20001858, "crc32\000\000\000\000\000\000\000\000\000\000\000"
                            "\000\000\000\000\000\000\000\000\000\000\000\000"
                            "\000\000\000\000\000\000\000\000\000\000\000\000"
                            "\000\000\000\000\000\000\000\000\000\000\000\000"
                            "\000\000\000\000\000\000\000\000\000\000\000\000",
         64);
  syscall(__NR_bind, (intptr_t)r[0], 0x20001840, 0x58);
  res = syscall(__NR_accept4, (intptr_t)r[0], 0, 0, 0);
  if (res != -1)
    r[1] = res;
  res = syscall(__NR_accept4, (intptr_t)r[1], 0, 0, 0);
  if (res != -1)
    r[2] = res;
  memcpy((void*)0x20000100, "net/dev\000", 8);
  res = -1;
  res = syz_open_procfs(0, 0x20000100);
  if (res != -1)
    r[3] = res;
  syscall(__NR_sendfile, (intptr_t)r[2], (intptr_t)r[3], 0, 0x900);
  return 0;
}