netdev - [PATCH 1/2 net] 6lowpan: add missing pskb_may

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Message-Id: <4fabc166.9208cc0a.4de8.ffff9211@mx.google.com>
Date:	Thu, 10 May 2012 17:22:42 +0400
From:	alex.bluesman.smirnov@...il.com
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org,
	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
Subject: [PATCH 1/2 net] 6lowpan: add missing pskb_may_pull() check

From: Alexander Smirnov <alex.bluesman.smirnov@...il.com>

Add pskb_may_pull() call when fetching u8 from skb.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
---
 net/ieee802154/6lowpan.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 32eb417..0ab3efe 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -295,6 +295,8 @@ static u8 lowpan_fetch_skb_u8(struct sk_buff *skb)
 {
 	u8 ret;
 
+	BUG_ON(!pskb_may_pull(skb, 1));
+
 	ret = skb->data[0];
 	skb_pull(skb, 1);
 
-- 
1.7.2.3

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