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 105ad10..332b947 100644 (file)
--- 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;