Check m_nComponents when using JBIG2Decode

core/src/fpdfapi/fpdf_render/render_int.h

 // 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
 
 #ifndef _FPDF_PAGEOBJ_H_
 #include "../../../include/fpdfapi/fpdf_pageobj.h"
 #endif
 class CPDF_QuickStretcher;
@@ skipping 401 matching lines @@
     FX_BOOL                             m_bHasMask;
 protected:
     FX_BOOL                             LoadColorInfo(CPDF_Dictionary* pFormResources, CPDF_Dictionary* pPageResources);
     CPDF_DIBSource*             LoadMask(FX_DWORD& MatteColor);
     CPDF_DIBSource*             LoadMaskDIB(CPDF_Stream* pMask);
     void                                LoadJpxBitmap();
     void                                LoadJbig2Bitmap();
     void                                LoadPalette();
     FX_BOOL                             CreateDecoder();
     void                                TranslateScanline24bpp(FX_LPBYTE dest_scan, FX_LPCBYTE src_scan) const;
-    void                ValidateBpc();
+    void                ValidateDictParam();
     CPDF_Document*              m_pDocument;
     const CPDF_Stream*  m_pStream;
     CPDF_StreamAcc*             m_pStreamAcc;
     const CPDF_Dictionary*      m_pDict;
     CPDF_ColorSpace*    m_pColorSpace;
     FX_DWORD                    m_Family, m_bpc, m_bpc_orig, m_nComponents, m_GroupFamily;
     FX_BOOL                             m_bLoadMask;
     FX_BOOL                             m_bDefaultDecode, m_bImageMask, m_bColorKey;
     DIB_COMP_DATA*              m_pCompData;
     FX_LPBYTE                   m_pLineBuf;
@@ skipping 19 matching lines @@
     virtual void                        TranslateDownSamples(FX_LPBYTE dest_buf, FX_LPCBYTE src_buf, int pixels, int Bpp) const;
     FX_LPCBYTE                          m_RampR;
     FX_LPCBYTE                          m_RampG;
     FX_LPCBYTE                          m_RampB;
 };
 struct _CPDF_UniqueKeyGen {
     void                Generate(int count, ...);
     FX_CHAR             m_Key[128];
     int                 m_KeyLen;
 };