Stack smashing in file io in c

Question

void issueBook(){
    printf("Hii!\n");
    
    //printf("Enter your student ID: ");
    //int stdID;
    //scanf("%d", &stdID);
    
    printf("Enter the book ID\n");
    int bookID;
    scanf("%d", &bookID);
    
    FILE *in_file = fopen("recordLib.txt", "r");
    FILE *fp = fopen("temp.txt", "w");
    struct stat sb;
    stat("recordLib.txt", &sb);

    char *file_contents = malloc(1024);
    int mark = 0;
    char ID[] = "";
    while (fscanf(in_file, "%[^\n] ", file_contents) != EOF) {
    
        int size = strlen(file_contents);
        int countCom = 0;
        char ID[] = "";
        //printf("%d\n", size);
        
        if(mark == 0){
            for(int i=0; i<size; i++){
                //printf("asdfsd\n");
                //printf("%c", file_contents[i]);            
                if(countCom == 0 && (file_contents[i] != ',')){
                    strncat(ID, &file_contents[i], 1);
                    //printf("%c\n", file_contents[i]);
                }
                
                else if(atoi(ID) != bookID){
                    break;
                }
                
                else if((file_contents[i] == ',') && (countCom < 3) && (atoi(ID) == bookID)){
                    //printf("%c\n", file_contents[i]);
                    //printf("%s\n", ID);
                    countCom++;
                }
                
                else{
                    //printf("%c\n", file_contents[i]);
                    if(file_contents[i] == '1'){
                        printf("Sorry!! someone has already issued the book");
                        mark = 2;
                        break;
                    }
                    else if(file_contents[i] == '0'){
                        file_contents[i] = '1';
                        mark = 1;
                        break;
                    }
                }
            }
        }        
        fwrite(file_contents, 1, size, fp);
        fwrite("\n", 1, 1, fp);
    }  
    
    fclose(fp);
    fclose(in_file);
    remove("recordLib.txt");
    rename("temp.txt", "recordLib.txt");
    //printf("%d\n", s);
    //if(mark == 1){
      //  updateStu();
    //}
    free(file_contents);   
    
    
}

I have made this function which takes the bookID from the user and then searches for it in the file: Searching: It reads line by line and as we already know till first comma ',' it would be book ID so it will store in another string and then convert it to int. Now it will compare it with entered ID if it matches then it will update the 0 at the end to 1, else move to next line.

Error: I always getting stack smashing error when the function again returns to the main function. I am unable to find the thing that is causing the error. Also that when I run in VS code, it runs successfully but in Linux this problem occurs! Please help. Thanks in advance.