@@ -955,7 +955,7 @@ static void pdf_parseobj(struct pdf_struct *pdf, struct pdf_obj *obj)

 	    pdfobj_flag(pdf, obj, LINEARIZED_PDF);

 	    objstate = STATE_NONE;

 	    trailer_end = pdf_readint(q, dict_length, "/H");

-	    if (trailer_end > 0) {

+	    if (trailer_end > 0 && trailer_end < pdf->size) {

 		trailer = trailer_end - 1024;

 		if (trailer < 0) trailer = 0;

 		q2 = pdf->map + trailer;