char: lp: fix possible integer overflow in lp_setup()

[pandora-kernel.git] / drivers / char / lp.c

diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index 97c3edb..bb8e370 100644 (file)
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -858,7 +858,11 @@ static int __init lp_setup (char *str)
        } else if (!strcmp(str, "auto")) {
                parport_nr[0] = LP_PARPORT_AUTO;
        } else if (!strcmp(str, "none")) {
-               parport_nr[parport_ptr++] = LP_PARPORT_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);
        } else if (!strcmp(str, "reset")) {
                reset = 1;
        }