netdev - [PATCH] lmc: Read outside array bounds

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Date:	Sun, 26 Jul 2009 00:18:17 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	khc@...waw.pl, netdev <netdev@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] lmc: Read outside array bounds

if dev_alloc_skb() fails on the first iteration of the allocation loop, and we
break out of the loop, then we end up writing before the start of the array.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index 45b1822..ac8d5b2 100644
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -1865,7 +1865,7 @@ static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
             if(skb == NULL){
                 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again
", sc->name);
                 sc->failed_ring = 1;
-                break;
+                return;
             }
             else{
                 sc->lmc_rxq[i] = skb;
--
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