From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Tue, 23 May 2017 23:18:37 +0000 (-0500)
Subject: net: fix potential null pointer dereference
X-Git-Tag: MMI-PSA29.97-13-9~5530^2~11
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=65d786c21bf8140dac83563306f46fe0b13a9aaa;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

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 4fea1b3dfbb4..7b652bb7ebe4 100644
--- 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);