net: fix potential null pointer dereference

Add null check to avoid a potential null pointer dereference.

Addresses-Coverity-ID: 1408831
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 4fea1b3dfbb4457247c4bc98dc9378591c36ecd3..7b652bb7ebe407b35c054009b521b173fd9fa361 100644 (file)
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -873,7 +873,7 @@ static struct gtp_dev *gtp_find_dev(struct net *src_net, struct nlattr *nla[])
 
        /* Check if there's an existing gtpX device to configure */
        dev = dev_get_by_index_rcu(net, nla_get_u32(nla[GTPA_LINK]));
-       if (dev->netdev_ops == &gtp_netdev_ops)
+       if (dev && dev->netdev_ops == &gtp_netdev_ops)
                gtp = netdev_priv(dev);
 
        put_net(net);