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home:dirkmueller:acdc:as_python3_module
ImageMagick.16417
ImageMagick-memory-corruption-in-MVG-paths.patch
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File ImageMagick-memory-corruption-in-MVG-paths.patch of Package ImageMagick.16417
diff --git a/MagickCore/draw.c b/MagickCore/draw.c index a44d4ff38..cdd5efb1a 100644 --- a/MagickCore/draw.c +++ b/MagickCore/draw.c @@ -2583,6 +2583,13 @@ MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info, case 'c': case 'C': { + if (LocaleCompare("class",keyword) == 0) + { + /* + Class primitive. + */ + break; + } if (LocaleCompare("clip-path",keyword) == 0) { char @@ -3036,6 +3043,8 @@ MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info, if (LocaleCompare("pop",keyword) == 0) { GetNextToken(q,&q,extent,token); + if (LocaleCompare("class",token) == 0) + break; if (LocaleCompare("clip-path",token) == 0) break; if (LocaleCompare("defs",token) == 0) @@ -3084,6 +3093,13 @@ MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info, if (LocaleCompare("push",keyword) == 0) { GetNextToken(q,&q,extent,token); + if (LocaleCompare("class",token) == 0) + { + /* + Class context. + */ + break; + } if (LocaleCompare("clip-path",token) == 0) { char @@ -3403,8 +3419,8 @@ MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info, if (LocaleCompare("stroke-antialias",keyword) == 0) { GetNextToken(q,&q,extent,token); - graphic_context[n]->stroke_antialias= - StringToLong(token) != 0 ? MagickTrue : MagickFalse; + graphic_context[n]->stroke_antialias=StringToLong(token) != 0 ? + MagickTrue : MagickFalse; break; } if (LocaleCompare("stroke-dasharray",keyword) == 0) @@ -6104,9 +6120,6 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, break; last_attribute=attribute; attribute=(int) (*p++); - if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && - (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) - q=(*mvg_info->primitive_info)+mvg_info->offset; switch (attribute) { case 'a': @@ -6232,6 +6245,9 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, if (token == next_token) ThrowPointExpectedException(token,exception); point.x=(double) (attribute == (int) 'H' ? x: point.x+x); + if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && + (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) + q=(*mvg_info->primitive_info)+mvg_info->offset; TracePoint(q,point); mvg_info->offset+=q->coordinates; q+=q->coordinates; @@ -6264,6 +6280,9 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, ThrowPointExpectedException(token,exception); point.x=(double) (attribute == (int) 'L' ? x : point.x+x); point.y=(double) (attribute == (int) 'L' ? y : point.y+y); + if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && + (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) + q=(*mvg_info->primitive_info)+mvg_info->offset; TracePoint(q,point); mvg_info->offset+=q->coordinates; q+=q->coordinates; @@ -6280,11 +6299,13 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, /* Move to. */ - if (q != primitive_info) + if (mvg_info->offset != subpath_offset) { + primitive_info=(*mvg_info->primitive_info)+subpath_offset; primitive_info->coordinates=(size_t) (q-primitive_info); number_coordinates+=primitive_info->coordinates; primitive_info=q; + subpath_offset=mvg_info->offset; } i=0; do @@ -6306,6 +6327,9 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, if (i == 0) start=point; i++; + if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && + (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) + q=(*mvg_info->primitive_info)+mvg_info->offset; TracePoint(q,point); mvg_info->offset+=q->coordinates; q+=q->coordinates; @@ -6476,6 +6500,9 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, if (token == next_token) ThrowPointExpectedException(token,exception); point.y=(double) (attribute == (int) 'V' ? y : point.y+y); + if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && + (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) + q=(*mvg_info->primitive_info)+mvg_info->offset; TracePoint(q,point); mvg_info->offset+=q->coordinates; q+=q->coordinates; @@ -6493,6 +6520,9 @@ static size_t TracePath(MVGInfo *mvg_info,const char *path, Close path. */ point=start; + if (((size_t) (mvg_info->offset+4096) > *mvg_info->extent) && + (CheckPrimitiveExtent(mvg_info,4096) != MagickFalse)) + q=(*mvg_info->primitive_info)+mvg_info->offset; TracePoint(q,point); mvg_info->offset+=q->coordinates; q+=q->coordinates; diff --git a/coders/svg.c b/coders/svg.c index 8ef0cdb9b..538823793 100644 --- a/coders/svg.c +++ b/coders/svg.c @@ -1139,11 +1139,8 @@ static void SVGStartElement(void *context,const xmlChar *name, case 'S': case 's': { - if (LocaleCompare((const char *) name,"symbol") == 0) - { - (void) FormatLocaleFile(svg_info->file,"push symbol\n"); - break; - } + if (LocaleCompare((char *) name,"style") == 0) + break; if (LocaleCompare((const char *) name,"svg") == 0) { svg_info->svgDepth++; @@ -1157,6 +1154,11 @@ static void SVGStartElement(void *context,const xmlChar *name, (void) FormatLocaleFile(svg_info->file,"fill-rule nonzero\n"); break; } + if (LocaleCompare((const char *) name,"symbol") == 0) + { + (void) FormatLocaleFile(svg_info->file,"push symbol\n"); + break; + } break; } case 'T': @@ -2552,9 +2554,11 @@ static void SVGEndElement(void *context,const xmlChar *name) svg_info->stop_color,svg_info->offset); break; } - if (LocaleCompare((const char *) name,"symbol") == 0) + if (LocaleCompare((char *) name,"style") == 0) { - (void) FormatLocaleFile(svg_info->file,"pop symbol\n"); + /* + Find style definitions in svg_info->text. + */ break; } if (LocaleCompare((const char *) name,"svg") == 0) @@ -2563,6 +2567,11 @@ static void SVGEndElement(void *context,const xmlChar *name) svg_info->svgDepth--; break; } + if (LocaleCompare((const char *) name,"symbol") == 0) + { + (void) FormatLocaleFile(svg_info->file,"pop symbol\n"); + break; + } break; } case 'T':
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