@@ -955,13 +955,15 @@ 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");

-	    trailer = trailer_end - 1024;

-	    if (trailer < 0) trailer = 0;

-	    q2 = pdf->map + trailer;

-	    cli_dbgmsg("cli_pdf: looking for trailer in linearized pdf: %ld - %ld\n", trailer, trailer_end);

-	    pdf->fileID = pdf_readstring(q2, trailer_end - trailer, "/ID", &pdf->fileIDlen);

-	    if (pdf->fileID)

-		cli_dbgmsg("found fileID\n");

+	    if (trailer_end > 0) {

+		trailer = trailer_end - 1024;

+		if (trailer < 0) trailer = 0;

+		q2 = pdf->map + trailer;

+		cli_dbgmsg("cli_pdf: looking for trailer in linearized pdf: %ld - %ld\n", trailer, trailer_end);

+		pdf->fileID = pdf_readstring(q2, trailer_end - trailer, "/ID", &pdf->fileIDlen);

+		if (pdf->fileID)

+		    cli_dbgmsg("found fileID\n");

+	    }

 	}

 	if (objstate == STATE_LAUNCHACTION)

 	    pdfobj_flag(pdf, obj, HAS_LAUNCHACTION);

@@ -1054,6 +1056,10 @@ static const char *pdf_getdict(const char *q0, int* len, const char *key)

 {

     const char *q;

+    if (*len <= 0) {

+	cli_dbgmsg("cli_pdf: bad length %d\n", *len);

+	return NULL;

+    }

     q = cli_memstr(q0, *len, key, strlen(key));

     if (!q) {

 	cli_dbgmsg("cli_pdf: %s not found in dict\n", key);