Staging: hv: netvsc: Fix a dereferencing issue

net_dev is being de-referenced without proper checking; fix it.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/rndis_filter.c b/drivers/staging/hv/rndis_filter.c
index ef43f2e..bafccb3 100644 (file)
--- a/drivers/staging/hv/rndis_filter.c
+++ b/drivers/staging/hv/rndis_filter.c
@@ -368,11 +368,11 @@ int rndis_filter_receive(struct hv_device *dev,
        struct rndis_message *rndis_hdr;
        struct net_device *ndev;
 
-       ndev = net_dev->ndev;
-
        if (!net_dev)
                return -EINVAL;
 
+       ndev = net_dev->ndev;
+
        /* Make sure the rndis device state is initialized */
        if (!net_dev->extension) {
                netdev_err(ndev, "got rndis message but no rndis device - "