From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Date: Fri, 19 Jun 2009 13:00:08 +0000 (+0400)
Subject: nl802154: fix Oops in ieee802154_nl_get_dev
X-Git-Tag: v2.6.31-rc2~26^2~24^2~1
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=932c1329acebc03ef5efa3647c9c3a967b59d0c4;p=~shefty%2Frdma-dev.git

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@gmail.com>
---

diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 105ad10876a..332b947ae81 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;