netdev - [PATCH] tokenring: Read buffer overflow

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Message-ID: <4A6B8969.1080903@gmail.com>
Date:	Sun, 26 Jul 2009 00:38:33 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] tokenring: Read buffer overflow

io[i] is read before the bounds check on i, order should be reversed

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/drivers/net/tokenring/ibmtr.c b/drivers/net/tokenring/ibmtr.c
index 9d89611..08a6c41 100644
--- a/drivers/net/tokenring/ibmtr.c
+++ b/drivers/net/tokenring/ibmtr.c
@@ -1912,7 +1912,7 @@ static int __init ibmtr_init(void)
 
 	find_turbo_adapters(io);
 
-	for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
+	for (i = 0; i < IBMTR_MAX_ADAPTERS && io[i]; i++) {
 		struct net_device *dev;
 		irq[i] = 0;
 		mem[i] = 0;
--
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