并面临警告:1.c:34:2: warning: 'memset' will always overflow; destination buffer has size 8, but size argument is 16 [-Wfortify-source] memset(&(((struct sockaddr_in6 *)&a)->sin6_addr.s6_addr), 0, 16); Run Code Online (Sandbox Code Playgroud) ...
'__builtin___memset_chk' will always overflow destination buffer 我试图在功能中复制这种行为,但似乎无法弄清楚它是如何完成的。我一直在搜寻字符串。我的问题是:如何在预处理器阶段中检查字符串的长度以将其与给定值进行比较? 注意:此行为仅在Mac OS上。在Linux上,它将很乐意编译,并且由此产生的二进制文件...
好多人已经知道利用strncpy替代strcpy来防止缓冲区越界。 但是如果还要考虑运行效率的话,也许strlcpy是一个更好的方式。 1. strcpy 我们知道,strcpy 是依据 作为结束判断的,如果 to 的空间不够,则会引起 buffer overflow。 strcpy 常规的实现代码如下(来自 OpenBSD 3.9): char * strcpy(char *to, const char *fro...
() that will return 0 when the buffer is zero or the buffer length - 1 character when an overflow occurs. Switching the unsafe uses ofsnprintf()to that made them safe. The result is that all complaints by this check aboutsprintf()on the codebase are noise. It would not be so bad ...
The reason will be displayed to describe this comment to others. Learn more. Hide comment @KungFuJesus, thank you for the clarification. I've verified that from cannot be ahead of safe since safe represents the end of the window and from is always within the bounds of the allocated win...