c - 为什么这段代码可以在我的本地机器上运行，但不能在 Leetcode 上运行？

Question

我正在解决 Leetcode 上的 Defanging an IP Address Question，当我在本地运行它时它工作正常：

char * defangIPaddr(char * address){
    char *defangedAddress;
    defangedAddress = malloc(sizeof(address) + 10);
    int j = 0;
    
    int length = strlen(address);
    for (int i = 0; i < length; i++)
    {
        if(address[i] == '.')
        {
            defangedAddress[j] = '[';
            defangedAddress[j+1] = '.';
            defangedAddress[j+2] = ']';
            j = j+3;
        }
        else
        {
            defangedAddress[j] = address[i];
            j++;
        }
    }
    return defangedAddress;
}

但是当我尝试在 leetcode 上运行时出现此错误：

=================================================================
==33==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000022 at pc 0x000000402033 bp 0x7ffdcaf4f350 sp 0x7ffdcaf4f340
READ of size 1 at 0x603000000022 thread T0
    #3 0x7f741cc6b82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
0x603000000022 is located 0 bytes to the right of 18-byte region [0x603000000010,0x603000000022)
allocated by thread T0 here:
    #0 0x7f741dc86f88 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0x10bf88)
    #3 0x7f741cc6b82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
Shadow bytes around the buggy address:
  0x0c067fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c067fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c067fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c067fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c067fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c067fff8000: fa fa 00 00[02]fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
  Shadow gap:              cc
==33==ABORTING

我尝试在本地安装 GDB 进行调试，但是，我得到了 GDB 错误：

(No debugging symbols found in ./defanging-an-ip-address)

而且我见过 Valgrind，但没有太多经验，所以我完全不知道如何调试和解决这个问题。

我知道我可以用另一种语言解决它（我在 JS、PHP、Python 方面有一些经验），但我想确定 C 语言，因此试图找出我哪里出了问题以及我需要做些什么来解决它，不会气馁和失去希望。

谢谢！

标签： cmemory-leaksgdbvalgrind