Segfault and uninitialized data when generating a random array in C

#include "stdafx.h"
#include <stdlib.h>
#include <time.h>
#define len 10

int *randomArray(void);

int main()
{
    srand(time(NULL));
    int *rArray = (int *)malloc(sizeof(int) * len);
    rArray = randomArray();
    for (int i = 0; i < len; i++) {
        printf("%d ", *(rArray+i));
    }
    puts("");
    free(rArray);
}

int *randomArray(void)
{
    int array[len] = { 0 };
    for (int i = 0; i < len; i++) {
        array[i] = rand() % len;
    }
    return array;
}

Task is to create an array of ints and have a function fill that array with random numbers. The function randomArray() works just fine, but for some reason the assignment rArray = randomArray() doesn't work correctly, although some elements of rArray are valid numbers not gibberish. Also, the last main line free(rArray); crashes the program which is just mind numbing for me, it doesn't make any sense. If I remove the line the program doesn't crash but we all know you need to free() a malloc()-ed array.