Segmentation fault upon reading from an array

I wrote a small program to illustrate a problem I'm running into. This program should copy the contents of "buff[200]" into the first position of the array "output". After performing the copy, I read the value out several times to see when it vanishes as I get a segmentation fault as soon as I try to access the data outside of the scope of driverFunc. I'm aware that I'm creating an array with 6 positions in it but only adding data to the first position, this will eventually be inside a loop that populates the rest of the output array. I also have the requirement for my use case that I need to be able to expand the size of this array.

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define BUFFER_SIZE 1035
int driverFunc(char ** output, int * sizeOfOutput) {
  int rows = 5;
  char buff[200] = "hello world";

  output = malloc(rows * sizeof(char *));  //malloc row space
  //malloc column space
  for (int i = 0; i < rows; i ++) {
    output[i] = malloc(BUFFER_SIZE * sizeof(char));
  }

  //copy contents of buff into first position of output
  strncpy(output[0], buff, BUFFER_SIZE-1);
  printf("Output 1: %s\n", output[0]); //verify that it's there

  //resize the array
  output = realloc(output, (rows+1) * sizeof(char *));
  //allocate space for the new entry
  output[rows] = malloc(BUFFER_SIZE * sizeof(char));
  *sizeOfOutput = rows;

  //verify that it's still there
  printf("Output 2: %s\n", output[0]);
  return 0;
}
int main() {
  char ** outputs;
  int sizeOfOutput;
  driverFunc(outputs, &sizeOfOutput);
  //verify that we can do useful things with our output
  printf("Reported size: %d\n", sizeOfOutput);
  printf("Captured output: %s\n", outputs[0]);  //segfault
}

expected output:

Output 1: hello world
Output 2: hello world
Reported size: 5
Captured output: hello world

received output:

Output 1: hello world
Output 2: hello world
Reported size: 5
Segmentation fault (core dumped)