netdev - [PATCH] pcnet32: Read buffer overflow

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Message-ID: <4A7C2B0B.9030508@gmail.com>
Date:	Fri, 07 Aug 2009 15:24:27 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	Don Fry <pcnet32@...izon.net>, netdev@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH] pcnet32: Read buffer overflow

An `options[cards_found]' that equals `sizeof(options_mapping)' is already beyond
the array.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index 2836815..7f834a3 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -1835,7 +1835,7 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
 	lp->chip_version = chip_version;
 	lp->msg_enable = pcnet32_debug;
 	if ((cards_found >= MAX_UNITS)
-	    || (options[cards_found] > sizeof(options_mapping)))
+	    || (options[cards_found] >= sizeof(options_mapping)))
 		lp->options = PCNET32_PORT_ASEL;
 	else
 		lp->options = options_mapping[options[cards_found]];
--
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