C语言字符串访问越界

力扣 https://leetcode.cn/problems/greatest-common-divisor-of-strings/

在做这道题目时，一直报内存访问越界。调试后找到问题所在，对于可能越界的地方，都需要先加上限制条件后再进行访问。

// str1 can be diveded by s or not
int canDivide(char *s, char *str1){
    int lens,len1;
    lens=strlen(s);
    len1=strlen(str1);
    
    if(lens==0)return 0;
    if(lens>len1 || (lens==len1 && strcmp(s,str1)!=0) || len1%lens!=0)return 0;
    else{
        char *sCom;
        sCom=(char *)malloc((len1+1)*sizeof(char));
        memset(sCom,0,(len1+1)*sizeof(char));
        for(int i=0;ilen2 ?len2:len1;
    
    char *res;
    res=(char *)malloc((minlen+1)*sizeof(char));
    memset(res,0,(minlen+1)*sizeof(char));
    
    char *temp;
    temp=(char *)malloc((minlen+1)*sizeof(char));
    memset(temp,0,(minlen+1)*sizeof(char));

    int i,j;
    if(len1<=len2){
        for(i=0;i