错误:dynamic-stack-buffer-overflow
地址擦除器错误:dynamic-stack-buffer-overflow
此示例显示由于缓冲区访问超出堆栈分配对象的边界而导致的错误。
示例 - alloca
溢出(右侧)
// example1.cpp
// dynamic-stack-buffer-overflow error
#include <malloc.h>
__declspec(noinline)
void foo(int index, int len) {
volatile char *str = (volatile char *)_alloca(len);
// reinterpret_cast<long>(str) & 31L;
str[index] = '1'; // Boom !
}
int main(int argc, char **argv) {
foo(33, 10);
return 0;
}
若要生成并测试此示例,请在 Visual Studio 2019 版本 16.9 或更高版本的开发人员命令提示符中运行以下命令:
cl example1.cpp /fsanitize=address /Zi
devenv /debugexe example1.exe
生成的错误
示例 - alloca
溢出(左侧)
// example2.cpp
// dynamic-stack-buffer-overflow error
#include <malloc.h>
__declspec(noinline)
void foo(int index, int len) {
volatile char *str = (volatile char *)_alloca(len);
str[index] = '1'; // Boom!
}
int main(int argc, char **argv) {
foo(-1, 10);
return 0;
}
若要生成并测试此示例,请在 Visual Studio 2019 版本 16.9 或更高版本的开发人员命令提示符中运行以下命令:
cl example2.cpp /fsanitize=address /Zi
devenv /debugexe example2.exe
生成错误 - alloca
溢出(左侧)
示例 - 对 alloca
的多次调用
// example3.cpp
// dynamic-stack-buffer-overflow error
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define SIZE 7
extern void nothing();
int x=13,*aa,*bb,y=0;
int fail = 0;
int tmp;
int main()
{
int* cc;
int i;
int k = 17;
__try {
tmp = k;
aa = (int*)_alloca(SIZE * sizeof(int));
if (((int)aa) & 0x3)
fail = 1;
for (i = 0; i < SIZE; i++) {
aa[i] = x + 1 + i;
}
bb = (int*)_alloca(x * sizeof(int));
if (((int)bb) & 0x3)
fail = 1;
for (i = 0; i < x; i++) {
bb[i] = 7;
bb[i] = bb[i] + i;
}
{
int s = 112728283;
int ar[8];
for (i = 0; i < 8; i++)
ar[i] = s * 17 * i;
}
cc = (int*)_alloca(x);
if (((int)cc) & 0x3)
fail = 1;
cc[0] = 0;
cc[1] = 1;
cc[2] = 2;
cc[3] = 3; // <--- Boom!
for (i = 0; i < x; i++)
if (bb[i] != (7 + i))
fail = 1;
if (tmp != k)
fail = 1;
if (fail) {
printf("fail\n");
exit(7);
}
printf("%d\n", (*cc) / y);
printf("fail\n");
exit(7);
}
__except (1)
{
for (i = 0; i < SIZE; i++)
if (aa[i] != (x + i + 1))
fail = 1;
if (fail) {
printf("fail\n");
exit(7);
}
printf("pass\n");
exit(0);
}
}
若要生成并测试此示例,请在 Visual Studio 2019 版本 16.9 或更高版本的开发人员命令提示符中运行以下命令:
cl example3.cpp /fsanitize=address /Zi
devenv /debugexe example3.exe
产生的错误 - 对 alloca 的多次调用
另请参阅
AddressSanitizer 概述
AddressSanitizer 已知问题
AddressSanitizer 生成和语言参考
AddressSanitizer 运行时参考
AddressSanitizer 阴影字节
AddressSanitizer 云或分布式测试
AddressSanitizer 调试程序集成
AddressSanitizer 错误示例