netdev - [PATCH 2/3] nl802154: fix Oops in ieee802154_nl_get

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Message-Id: <1246287735-2692-3-git-send-email-dbaryshkov@gmail.com>
Date:	Mon, 29 Jun 2009 19:02:14 +0400
From:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	slapin@...fans.org
Subject: [PATCH 2/3] nl802154: fix Oops in ieee802154_nl_get_dev

ieee802154_nl_get_dev() lacks check for the existance of the device
that was returned by dev_get_XXX, thus resulting in Oops for non-existing
devices. Fix it.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
---
 net/ieee802154/netlink.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 105ad10..332b947 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -276,6 +276,9 @@ static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
 	else
 		return NULL;
 
+	if (!dev)
+		return NULL;
+
 	if (dev->type != ARPHRD_IEEE802154) {
 		dev_put(dev);
 		return NULL;
-- 
1.6.3.1

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