shithub: jbig2

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Bug 693284: Detect missing glyphs and fail.

--- a/jbig2_symbol_dict.c

+++ b/jbig2_symbol_dict.c

@@ -607,6 +607,13 @@

 		      rparams.reference = (ID < ninsyms) ?

 					params->SDINSYMS->glyphs[ID] :

 					SDNEWSYMS->glyphs[ID-ninsyms];

+		      /* SumatraPDF: fail on missing glyphs */

+		      if (rparams.reference == NULL) {

+		          code = jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number,

+		              "missing glyph %d/%d!", ID, ninsyms);

+		          jbig2_image_release(ctx, image);

+		          goto cleanup4;

+		      }

 		      rparams.DX = RDX;

 		      rparams.DY = RDY;

 		      rparams.TPGRON = 0;

--- a/jbig2_text.c

+++ b/jbig2_text.c

@@ -302,6 +302,12 @@

 		while (id >= dicts[index]->n_symbols)

 		    id -= dicts[index++]->n_symbols;

 		IB = jbig2_image_clone(ctx, dicts[index]->glyphs[id]);

+		/* SumatraPDF: fail on missing glyphs */

+		if (!IB) {

+		    code = jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number,

+		        "missing glyph %d/%d!", index, id);

+		    goto cleanup2;

+		}

 	    }

 	    if (params->SBREFINE) {

 	      if (params->SBHUFF) {