netdev - [PATCH] 3c515: Write outside array bounds

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Message-ID: <4A6B88B1.9000907@gmail.com>
Date:	Sun, 26 Jul 2009 00:35:29 +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] 3c515: Write outside array bounds

if dev_alloc_skb() fails on the first iteration, a write to
cp->rx_ring[-1] occurs.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
Please review: can we error return like this?

diff --git a/drivers/net/3c515.c b/drivers/net/3c515.c
index 3e00fa8..c84815a 100644
--- a/drivers/net/3c515.c
+++ b/drivers/net/3c515.c
@@ -827,7 +827,7 @@ static int corkscrew_open(struct net_device *dev)
 			skb = dev_alloc_skb(PKT_BUF_SZ);
 			vp->rx_skbuff[i] = skb;
 			if (skb == NULL)
-				break;	/* Bad news!  */
+				return -ENOMEM;	/* Bad news!  */
 			skb->dev = dev;	/* Mark as being used by this device. */
 			skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
 			vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
--
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