--- zzzz-none-000/linux-3.10.107/drivers/char/lp.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/char/lp.c	2021-02-04 17:41:59.000000000 +0000
@@ -587,6 +587,8 @@
 		return -ENODEV;
 	switch ( cmd ) {
 		case LPTIME:
+			if (arg > UINT_MAX / HZ)
+				return -EINVAL;
 			LP_TIME(minor) = arg * HZ/100;
 			break;
 		case LPCHAR:
@@ -857,11 +859,7 @@
 	} else if (!strcmp(str, "auto")) {
 		parport_nr[0] = LP_PARPORT_AUTO;
 	} else if (!strcmp(str, "none")) {
-		if (parport_ptr < LP_NO)
-			parport_nr[parport_ptr++] = LP_PARPORT_NONE;
-		else
-			printk(KERN_INFO "lp: too many ports, %s ignored.\n",
-			       str);
+		parport_nr[parport_ptr++] = LP_PARPORT_NONE;
 	} else if (!strcmp(str, "reset")) {
 		reset = 1;
 	}