m_pColorSpace can not be NULL for image object with DCTDecode filter

core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fxge/fx_ge.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_render.h"
@@ skipping 486 matching lines @@
     }
     ValidateDictParam();
     m_pCompData = GetDecodeAndMaskArray(m_bDefaultDecode, m_bColorKey);
     if (m_pCompData == NULL) {
         return FALSE;
     }
     return TRUE;
 }
 DIB_COMP_DATA* CPDF_DIBSource::GetDecodeAndMaskArray(FX_BOOL& bDefaultDecode, FX_BOOL& bColorKey)
 {
+    if (m_pColorSpace == NULL) {
+        return NULL;
+    }
     DIB_COMP_DATA* pCompData = FX_Alloc(DIB_COMP_DATA, m_nComponents);
     if (pCompData == NULL) {
         return NULL;
     }
     int max_data = (1 << m_bpc) - 1;
     CPDF_Array* pDecode = m_pDict->GetArray(FX_BSTRC("Decode"));
     if (pDecode) {
         for (FX_DWORD i = 0; i < m_nComponents; i ++) {
             pCompData[i].m_DecodeMin = pDecode->GetNumber(i * 2);
             FX_FLOAT max = pDecode->GetNumber(i * 2 + 1);
@@ skipping 1047 matching lines @@
     if (!m_bCached) {
         if (m_pBitmap) {
             delete m_pBitmap;
             m_pBitmap = NULL;
         }
         if (m_pMask) {
             delete m_pMask;
         }
     }
 }