Chained list prints beyond what is inserted

Question

I have that function

verticeobj* loadverticeObj(char *fname,verticeobj *vo){
    FILE *fp;
    int read;
    float x, y, z;

    char ch;
    fp=fopen(fname,"r");
    if (!fp)
    {
        printf("can't open file %s\n", fname);
        exit(1);
    }
        while(!(feof(fp)))
        {
            read=fscanf(fp,"%c",&ch);

            if(read==1&&ch=='v')
            {
                read=fscanf(fp,"%f %f %f",&x,&y,&z);

                vo =inserevertice(vo,x,y,z);
            }
            else
            {
                if(ch=='f')
                {
                    read=fscanf(fp,"%d %d %d %d",&x,&y,&z,&ch);
                }
            }
        }
    fclose(fp);

    return vo;
}

Which takes the chained list of type verticeobj and returns the filled list. Within the function, when the condition is met, an insertion function is called by rerunning the list to enter the data into the list. The insertion function is:

verticeobj* inserevertice(verticeobj *lv, float x, float y, float z){
    verticeobj* novo = (verticeobj*)malloc(sizeof(verticeobj));
    novo->x = x;
    novo->y = y;
    novo->z = z;
    novo->prox = lv;
    lv = novo;

    return lv;
}

The point is that in the main when I call a function to print the list, it prints the desired elements by putting two more lines of junk that I don’t know for sure what it is.Within the insertion function I put a printf to test and it prints all elements correctly. From now on, thank you

Answer 1

I solved the problem was that I was not initiating the lists chained with NULL