syzkaller-repros/linux/9b0d1b176be765385ff290f833f1a86c40101dbe.c

// KASAN: slab-out-of-bounds Read in _autofs_dev_ioctl
// https://syzkaller.appspot.com/bug?id=9b0d1b176be765385ff290f833f1a86c40101dbe
// status:fixed
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

uint64_t r[1] = {0xffffffffffffffff};

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  long res = 0;
  syscall(__NR_socket, 0xa, 0x1000000000002, 0);
  memcpy((void*)0x200013c0, "./file0", 8);
  syscall(__NR_mkdir, 0x200013c0, 0);
  memcpy((void*)0x20000080, "./file0", 8);
  memcpy((void*)0x20026ff8, "./file0", 8);
  memcpy((void*)0x2000c000, "ramfs", 6);
  syscall(__NR_mount, 0x20000080, 0x20026ff8, 0x2000c000, 0, 0x2000a000);
  memcpy((void*)0x20000000, "./file0", 8);
  syscall(__NR_chdir, 0x20000000);
  memcpy((void*)0x20000100, "./bus", 6);
  syscall(__NR_creat, 0x20000100, 0);
  memcpy((void*)0x20000040, "/dev/autofs", 12);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000040, 0, 0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000180, "\x01\x00\x00\x00\x00\x00\x00\x00\x18\x01\x00\x00"
                            "\x04\x00\x00\x00\xfc\x23\x2f\xf4\x1c\xd8\x49\x83"
                            "\x2f",
         25);
  syscall(__NR_ioctl, r[0], 0x800000000000937e, 0x20000180);
  return 0;
}