output: #fixed code
                                  @Override
      public long getSwapUsed() {
          PdhFmtCounterValue phPagefileCounterValue = new PdhFmtCounterValue();
          int ret = Pdh.INSTANCE.PdhGetFormattedCounterValue(pPagefile.getValue(), Pdh.PDH_FMT_LARGE | Pdh.PDH_FMT_1000,
                  null, phPagefileCounterValue);
          if (ret != 0) {
              LOG.warn("Failed to get Pagefile % Usage counter. Error code: {}", String.format("0x%08X", ret));
              return 0L;
          }
          // Returns results in 1000's of percent, e.g. 5% is 5000
          // Multiply by page file size and Divide by 100 * 1000
          // Putting division at end avoids need to cast division to double
          return getSwapTotal() * phPagefileCounterValue.value.largeValue / 100000;
      }
input: #vulnerable code 
                                  @Override
      public long getSwapUsed() {
          long total;
          long available;
          
          if (!Kernel32.INSTANCE.GlobalMemoryStatusEx(this._memory)) {
              LOG.error("Failed to Initialize MemoryStatusEx. Error code: {}", Kernel32.INSTANCE.GetLastError());
              this._memory = null;
              return 0L;
          }
  
          total = this.getSwapTotal();
          available = this._memory.ullAvailPageFile.longValue() - this._memory.ullAvailPhys.longValue();
          
          return total - available;
      } 
                              #location 12 
                              #vulnerability type NULL_DEREFERENCE