C: What's wrong with this code?

gistfile1.txt

static char* webfp_logfile_path = NULL;

static char*
get_logfile_path()
{
  if (!webfp_logfile_path) {
    char *home_path = getenv("HOME");
    char* logfile_path = "/FingerprintSecureDrop/logging/tor_cell_seq.log";
    int x = strlen(home_path) + strlen(logfile_path) + 1;
    char abs_logfile_path[x];
    strcpy(abs_logfile_path, home_path);
    strcat(abs_logfile_path, logfile_path);
    webfp_logfile_path = abs_logfile_path;
  }
  return webfp_logfile_path;
}