static int exif_process_IFD_in_MAKERNOTE(image_info_type *ImageInfo, char * value_ptr, int value_len, char *offset_base, size_t IFDlength, size_t displacement TSRMLS_DC)
{
	int de, i=0, section_index = SECTION_MAKERNOTE;
	int NumDirEntries, old_motorola_intel, offset_diff;
	const maker_note_type *maker_note;
	char *dir_start;

	for (i=0; i<=sizeof(maker_note_array)/sizeof(maker_note_type); i++) {
		if (i==sizeof(maker_note_array)/sizeof(maker_note_type))
			return FALSE;
		maker_note = maker_note_array+i;

		/*exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "check (%s,%s)", maker_note->make?maker_note->make:"", maker_note->model?maker_note->model:"");*/
		if (maker_note->make && (!ImageInfo->make || strcmp(maker_note->make, ImageInfo->make)))
			continue;
		if (maker_note->model && (!ImageInfo->model || strcmp(maker_note->model, ImageInfo->model)))
			continue;
		if (maker_note->id_string && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
			continue;
		break;
	}

	dir_start = value_ptr + maker_note->offset;

#ifdef EXIF_DEBUG
	exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process %s @x%04X + 0x%04X=%d: %s", exif_get_sectionname(section_index), (int)dir_start-(int)offset_base+maker_note->offset+displacement, value_len, value_len, exif_char_dump(value_ptr, value_len, (int)dir_start-(int)offset_base+maker_note->offset+displacement));
#endif

	ImageInfo->sections_found |= FOUND_MAKERNOTE;

	old_motorola_intel = ImageInfo->motorola_intel;
	switch (maker_note->byte_order) {
		case MN_ORDER_INTEL:
			ImageInfo->motorola_intel = 0;
			break;
		case MN_ORDER_MOTOROLA:
			ImageInfo->motorola_intel = 1;
			break;
		default:
		case MN_ORDER_NORMAL:
			break;
	}

	NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);

	switch (maker_note->offset_mode) {
		case MN_OFFSET_MAKER:
			offset_base = value_ptr;
			break;
		case MN_OFFSET_GUESS:
			offset_diff = 2 + NumDirEntries*12 + 4 - php_ifd_get32u(dir_start+10, ImageInfo->motorola_intel);
#ifdef EXIF_DEBUG
			exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Using automatic offset correction: 0x%04X", ((int)dir_start-(int)offset_base+maker_note->offset+displacement) + offset_diff);
#endif
			offset_base = value_ptr + offset_diff;
			break;
		default:
		case MN_OFFSET_NORMAL:
			break;
	}

	if ((2+NumDirEntries*12) > value_len) {
		exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 2 + x%04X*12 = x%04X > x%04X", NumDirEntries, 2+NumDirEntries*12, value_len);
		return FALSE;
	}

	for (de=0;de<NumDirEntries;de++) {
		if (!exif_process_IFD_TAG(ImageInfo, dir_start + 2 + 12 * de,
								  offset_base, IFDlength, displacement, section_index, 0, maker_note->tag_table TSRMLS_CC)) {
			return FALSE;
		}
	}
	ImageInfo->motorola_intel = old_motorola_intel;
/*	NextDirOffset (must be NULL) = php_ifd_get32u(dir_start+2+12*de, ImageInfo->motorola_intel);*/
#ifdef EXIF_DEBUG
	exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Subsection %s done", exif_get_sectionname(SECTION_MAKERNOTE));
#endif
	return TRUE;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.