大小为8的读取无效，大小为8的写入无效，C

我有一个valgrind错误，我不知道如何消除它们：

==5685== Invalid read of size 8
==5685==    at 0x4008A1: main (in /home/mazix/Desktop/tests/filenames)
==5685==  Address 0x5207670 is 608 bytes inside a block of size 609 alloc'd
==5685==    at 0x4C2CD7B: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5685==    by 0x40075E: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685== 
==5685== Invalid read of size 8
==5685==    at 0x4008BB: main (in /home/mazix/Desktop/tests/filenames)
==5685==  Address 0x5207670 is 608 bytes inside a block of size 609 alloc'd
==5685==    at 0x4C2CD7B: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5685==    by 0x40075E: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685== 
==5685== 
==5685== FILE DESCRIPTORS: 3 open at exit.
==5685== Open file descriptor 2: /dev/pts/1
==5685==    <inherited from parent>
==5685== 
==5685== Open file descriptor 1: /dev/pts/1
==5685==    <inherited from parent>
==5685== 
==5685== Open file descriptor 0: /dev/pts/1
==5685==    <inherited from parent>
==5685== 
==5685== 
==5685== HEAP SUMMARY:
==5685==     in use at exit: 0 bytes in 0 blocks
==5685==   total heap usage: 231 allocs, 231 frees, 43,693 bytes allocated
==5685== 
==5685== All heap blocks were freed -- no leaks are possible
==5685== 
==5685== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 2 from 2)
==5685== 
==5685== 1 errors in context 1 of 3:
==5685== Invalid read of size 8
==5685==    at 0x4008BB: main (in /home/mazix/Desktop/tests/filenames)
==5685==  Address 0x5207670 is 608 bytes inside a block of size 609 alloc'd
==5685==    at 0x4C2CD7B: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5685==    by 0x40075E: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685== 
==5685== 
==5685== 1 errors in context 2 of 3:
==5685== Invalid read of size 8
==5685==    at 0x4008A1: main (in /home/mazix/Desktop/tests/filenames)
==5685==  Address 0x5207670 is 608 bytes inside a block of size 609 alloc'd
==5685==    at 0x4C2CD7B: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5685==    by 0x40075E: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685== 
==5685== 
==5685== 1 errors in context 3 of 3:
==5685== Invalid write of size 8
==5685==    at 0x400806: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685==  Address 0x5207670 is 608 bytes inside a block of size 609 alloc'd
==5685==    at 0x4C2CD7B: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5685==    by 0x40075E: getFilenames (in /home/mazix/Desktop/tests/filenames)
==5685==    by 0x40083C: main (in /home/mazix/Desktop/tests/filenames)
==5685== 
--5685-- 
--5685-- used_suppression:      2 dl-hack3-cond-1
==5685== 
==5685== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 2 from 2)

==5685==大小为8的无效读取
==5685==at 0x4008A1:main（在/home/mazix/Desktop/tests/filename中）
==5685==地址0x5207670是大小为609 alloc'd的块中的608字节
==5685==at 0x4C2CD7B:malloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）
==5685==by 0x40075E:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685== 
==5685==大小为8的无效读取
==5685==at 0x4008BB:main（在/home/mazix/Desktop/tests/filename中）
==5685==地址0x5207670是大小为609 alloc'd的块中的608字节
==5685==at 0x4C2CD7B:malloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）
==5685==by 0x40075E:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685== 
==5685== 
==5685==文件描述符：3在退出时打开。
==5685==打开文件描述符2:/dev/pts/1
==5685==    
==5685== 
==5685==打开文件描述符1:/dev/pts/1
==5685==    
==5685== 
==5685==打开文件描述符0:/dev/pts/1
==5685==    
==5685== 
==5685== 
==5685==堆摘要：
==5685==在出口处使用：0块中的0字节
==5685==总堆使用率：231个alloc，231个free，43693个字节分配
==5685== 
==5685==所有堆块都已释放--不可能存在泄漏
==5685== 
==5685==错误摘要：3个上下文中的3个错误（已抑制：2个上下文中的2个）
==5685== 
==5685==3个上下文中的1个错误：
==5685==大小为8的无效读取
==5685==at 0x4008BB:main（在/home/mazix/Desktop/tests/filename中）
==5685==地址0x5207670是大小为609 alloc'd的块中的608字节
==5685==at 0x4C2CD7B:malloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）
==5685==by 0x40075E:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685== 
==5685== 
==5685==3中的第2个上下文中的1个错误：
==5685==大小为8的无效读取
==5685==at 0x4008A1:main（在/home/mazix/Desktop/tests/filename中）
==5685==地址0x5207670是大小为609 alloc'd的块中的608字节
==5685==at 0x4C2CD7B:malloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）
==5685==by 0x40075E:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685== 
==5685== 
==5685==3个上下文中的1个错误，共3个：
==5685==大小为8的无效写入
==5685==at 0x400806:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685==地址0x5207670是大小为609 alloc'd的块中的608字节
==5685==at 0x4C2CD7B:malloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）
==5685==by 0x40075E:getfilename（在/home/mazix/Desktop/tests/filename中）
==5685==by 0x40083C:main（在/home/mazix/Desktop/tests/filename中）
==5685== 
--5685-- 
--5685--使用的\u抑制：2 dl-hack 3-cond-1
==5685== 
==5685==错误摘要：3个上下文中的3个错误（已抑制：2个上下文中的2个）

我的代码是：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glob.h>

char **getFilenames()
{
    char **filenames = NULL;
    glob_t data;
    unsigned int i;

    switch( glob("./*.*", 0, NULL, &data ) )
    {
    case 0:
        break;
    case GLOB_NOSPACE:
        printf( "Out of memory\n" );
        break;
    case GLOB_ABORTED:
        printf( "Reading error\n" );
        break;
    case GLOB_NOMATCH:
        printf( "No files found\n" );
        break;
    default:
        break;
    }

    filenames = malloc(sizeof(char*)*(data.gl_pathc)+1);
    for(i=0; i<data.gl_pathc; i++)
    {
        int len = strlen(data.gl_pathv[i]);
        filenames[i] = malloc(sizeof(char*)*len);
        strcpy(filenames[i], data.gl_pathv[i]);
    }
    filenames[i] = NULL;
    globfree( &data );
    return filenames;
}

int main( int argc, char *argv[] )
{
    char **filenames = getFilenames();
    unsigned int i = 0;
    for(i=0; filenames[i] != NULL; i++)
    {
        printf("%s\n", filenames[i]);
        free(filenames[i]);
    }

    free(filenames[i]);
    free(filenames);

    return 0;
}

#包括
#包括
#包括
#包括
char**getFilenames（）
{
char**filenames=NULL；
全球数据；
无符号整数i；
开关（全局（“./*.*”、0、NULL和数据））
{
案例0：
打破
案例GLOB_NOSPACE：
printf（“内存不足\n”）；
打破
案例GLOB_中止：
printf（“读取错误\n”）；
打破
案例全局匹配：
printf（“未找到文件”）；
打破
违约：
打破
}
filenames=malloc（sizeof（char*）*（data.gl_pathc）+1）；
对于（i=0；i您正在为
data.gl\u pathc
指针+1字节分配空间，然后您正在使用
data.gl\u pathc+1
指针（最后一个指针由
文件名[i]=NULL；

换句话说，你的分配

filenames = malloc(sizeof(char*) * (data.gl_pathc) + 1);

可能应该分配
data.gl_pathc+1
指针

filenames = malloc(sizeof(char*) * (data.gl_pathc + 1));

您正在为
data.gl\u pathc
指针+1字节分配空间，然后使用
data.gl\u pathc+1
指针（最后一个指针由
filenames[i]=NULL设置；

换句话说，你的分配

filenames = malloc(sizeof(char*) * (data.gl_pathc) + 1);

可能应该分配
data.gl_pathc+1
指针

filenames = malloc(sizeof(char*) * (data.gl_pathc + 1));

对，就是这样：）谢谢！对，就是这样：）谢谢！