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[libpng15] Added palette-index checking.

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Glenn Randers-Pehrson
2012-03-04 22:16:54 -06:00
parent caae038b69
commit 454e05a63a
15 changed files with 242 additions and 43 deletions
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7
pngread.c
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@@ -801,6 +801,13 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
/* Report invalid palette index; added at libng-1.5.10 */
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
png_ptr->num_palette_max > png_ptr->num_palette)
png_warning(png_ptr, "Read palette index exceeding num_palette");
#endif
do
{
png_uint_32 length = png_read_chunk_header(png_ptr);