net: Fix oops in dev_ifsioc()
A command like this: "brctl addif br1 eth1" issued as a user gave me
an oops when bridge module wasn't loaded. It's caused by using a dev
pointer before checking for NULL.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 048cf11..daca72e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3745,11 +3745,13 @@
{
int err;
struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
- const struct net_device_ops *ops = dev->netdev_ops;
+ const struct net_device_ops *ops;
if (!dev)
return -ENODEV;
+ ops = dev->netdev_ops;
+
switch (cmd) {
case SIOCSIFFLAGS: /* Set interface flags */
return dev_change_flags(dev, ifr->ifr_flags);